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    <link:label id="lab_us-gaap_DebtDisclosureAbstract_9FB1E7FB8463C82E1FAC76EB4C9AC9BA_label_en-US" xlink:label="lab_us-gaap_DebtDisclosureAbstract_9FB1E7FB8463C82E1FAC76EB4C9AC9BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Disclosure [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="loc_us-gaap_DebtDisclosureAbstract_9FB1E7FB8463C82E1FAC76EB4C9AC9BA" xlink:type="locator" />
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    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88_terseLabel_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Senior Notes 5.967%</link:label>
    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88_label_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ten Year Unsecured Senior Notes Five Point Nine Six Seven Percent [Member]</link:label>
    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88_documentation_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ten Year Unsecured Senior Notes Five Point Nine Six Seven Percent [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember" xlink:label="loc_bxp_TenYearUnsecuredSeniorNotesFivePointNineSixSevenPercentMember_67898958A5C1B57DCC5B76EB4C9A4E88" xlink:type="locator" />
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    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419_terseLabel_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Senior Notes 5.708%</link:label>
    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419_label_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ten Year Unsecured Senior Notes Five Point Seven Zero Eight Percent [Member]</link:label>
    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419_documentation_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ten Year Unsecured Senior Notes Five Point Seven Zero Eight Percent [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember" xlink:label="loc_bxp_TenYearUnsecuredSeniorNotesFivePointSevenZeroEightPercentMember_E4B754A2DAFC25AC852276EB4C9AC419" xlink:type="locator" />
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    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22_terseLabel_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Senior Notes 4.289%</link:label>
    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22_label_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Ten Year Unsecured Senior Notes Four Point Two Eight Nine Percent [Member]</link:label>
    <link:label id="lab_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22_documentation_en-US" xlink:label="lab_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Ten Year Unsecured Senior Notes Four Point Two Eight Nine Percent [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember" xlink:label="loc_bxp_TenYearUnsecuredSeniorNotesFourPointTwoEightNinePercentMember_1226AF319E37976C71EF76EB4C9AFB22" xlink:type="locator" />
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    <link:label id="lab_bxp_SevenYearUnsecuredSeniorNotesThreePointEightFiveThreePercentMember_B3874BE580362B4EC3C376EB4C9A1D68_terseLabel_en-US" xlink:label="lab_bxp_SevenYearUnsecuredSeniorNotesThreePointEightFiveThreePercentMember_B3874BE580362B4EC3C376EB4C9A1D68" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Senior Notes 3.853%</link:label>
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    <link:label id="lab_bxp_SevenYearUnsecuredSeniorNotesThreePointEightFiveThreePercentMember_B3874BE580362B4EC3C376EB4C9A1D68_documentation_en-US" xlink:label="lab_bxp_SevenYearUnsecuredSeniorNotesThreePointEightFiveThreePercentMember_B3874BE580362B4EC3C376EB4C9A1D68" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Seven Year Unsecured Senior Notes Three Point Eight Five Three Percent [Member]</link:label>
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    <link:label id="lab_bxp_ElevenYearUnsecuredSeniorNotesThreePointNineFiveFourPercentMember_34DCE273B09717CB91D176EB4C9AA885_terseLabel_en-US" xlink:label="lab_bxp_ElevenYearUnsecuredSeniorNotesThreePointNineFiveFourPercentMember_34DCE273B09717CB91D176EB4C9AA885" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unsecured Senior Notes 3.954%</link:label>
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    <link:label id="lab_bxp_ElevenYearUnsecuredSeniorNotesThreePointNineFiveFourPercentMember_34DCE273B09717CB91D176EB4C9AA885_documentation_en-US" xlink:label="lab_bxp_ElevenYearUnsecuredSeniorNotesThreePointNineFiveFourPercentMember_34DCE273B09717CB91D176EB4C9AA885" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Eleven Year Unsecured Senior Notes Three Point Nine Five Four Percent [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_ElevenYearUnsecuredSeniorNotesThreePointNineFiveFourPercentMember" xlink:label="loc_bxp_ElevenYearUnsecuredSeniorNotesThreePointNineFiveFourPercentMember_34DCE273B09717CB91D176EB4C9AA885" xlink:type="locator" />
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    <link:label id="lab_bxp_Bankruptcyclaimamountfiledbygeneralcreditor_B9A2312B687054726ED276EB4C4CAD8C_terseLabel_en-US" xlink:label="lab_bxp_Bankruptcyclaimamountfiledbygeneralcreditor_B9A2312B687054726ED276EB4C4CAD8C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Bankruptcy claim, amount filed by general creditor</link:label>
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    <link:label id="lab_bxp_InsurancePolicyLimit_A4CFB343F1A3D0019A3876EB4C4C409F_verboseLabel_en-US" xlink:label="lab_bxp_InsurancePolicyLimit_A4CFB343F1A3D0019A3876EB4C4C409F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Property insurance program per occurrence limits</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_InsurancePolicyLimit" xlink:label="loc_bxp_InsurancePolicyLimit_A4CFB343F1A3D0019A3876EB4C4C409F" xlink:type="locator" />
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    <link:label id="lab_bxp_CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp_2F0ECF069C8BE669F27A76EB4C4C608B_terseLabel_en-US" xlink:label="lab_bxp_CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp_2F0ECF069C8BE669F27A76EB4C4C608B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP</link:label>
    <link:label id="lab_bxp_CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp_2F0ECF069C8BE669F27A76EB4C4C608B_label_en-US" xlink:label="lab_bxp_CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp_2F0ECF069C8BE669F27A76EB4C4C608B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Coverage For Acts Of Terrorism Under TRIA Covered in Excess of Amount Covered by IXP</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp_2F0ECF069C8BE669F27A76EB4C4C608B" xlink:to="lab_bxp_CoverageForActsOfTerrorismUnderTriaCoveredInExcessOfAmountCoveredByIxp_2F0ECF069C8BE669F27A76EB4C4C608B" xlink:type="arc" />
    <link:label id="lab_bxp_CoverageForActsOfTerrorismUnderTria_F9E7406273B89B72BF7476EB4C4CB76D_terseLabel_en-US" xlink:label="lab_bxp_CoverageForActsOfTerrorismUnderTria_F9E7406273B89B72BF7476EB4C4CB76D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Coverage for acts of Terrorism certified under TRIA in excess of amount provided by NYXP, LLC, as a direct insurer</link:label>
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    <link:label id="lab_bxp_CoverageForActsOfTerrorismCertifiedUnderTriaProvidedByNyxpLlcAsDirectInsurer_657FEDFB6540B97C3BF276EB4C4CC949_label_en-US" xlink:label="lab_bxp_CoverageForActsOfTerrorismCertifiedUnderTriaProvidedByNyxpLlcAsDirectInsurer_657FEDFB6540B97C3BF276EB4C4CC949" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Coverage for acts of Terrorism certified under TRIA provided by NYXP, LLC, as a direct insurer</link:label>
    <link:label id="lab_bxp_CoverageForActsOfTerrorismCertifiedUnderTriaProvidedByNyxpLlcAsDirectInsurer_657FEDFB6540B97C3BF276EB4C4CC949_documentation_en-US" xlink:label="lab_bxp_CoverageForActsOfTerrorismCertifiedUnderTriaProvidedByNyxpLlcAsDirectInsurer_657FEDFB6540B97C3BF276EB4C4CC949" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The property insurance program per occurrence limits for 767 Fifth Avenue are $1.625 billion, including coverage for acts of terrorism certified under TRIA, with $1.375 billion of coverage for losses in excess of $250 million being provided by NYXP, LLC, as a direct insurer.</link:label>
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    <link:label id="lab_bxp_PerOccurrenceLimitForNbcrCoverage_FED579BBB2DE2FBAB24576EB4C4C9B71_terseLabel_en-US" xlink:label="lab_bxp_PerOccurrenceLimitForNbcrCoverage_FED579BBB2DE2FBAB24576EB4C4C9B71" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Per occurrence limit for NBCR Coverage</link:label>
    <link:label id="lab_bxp_PerOccurrenceLimitForNbcrCoverage_FED579BBB2DE2FBAB24576EB4C4C9B71_label_en-US" xlink:label="lab_bxp_PerOccurrenceLimitForNbcrCoverage_FED579BBB2DE2FBAB24576EB4C4C9B71" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Per occurrence limit for NBCR Coverage</link:label>
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    <link:label id="lab_bxp_ProgramTriggerValue_12D29BC6B64F7E75BC1276EB4C4C91A7_terseLabel_en-US" xlink:label="lab_bxp_ProgramTriggerValue_12D29BC6B64F7E75BC1276EB4C4C91A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Value of program trigger</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_ProgramTriggerValue" xlink:label="loc_bxp_ProgramTriggerValue_12D29BC6B64F7E75BC1276EB4C4C91A7" xlink:type="locator" />
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    <link:label id="lab_bxp_ProgramTriggerCoinsurance_81C2044C5AB6DE5A74AF76EB4C4CD0C1_label_en-US" xlink:label="lab_bxp_ProgramTriggerCoinsurance_81C2044C5AB6DE5A74AF76EB4C4CD0C1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Program Trigger Coinsurance</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_ProgramTriggerCoinsurance" xlink:label="loc_bxp_ProgramTriggerCoinsurance_81C2044C5AB6DE5A74AF76EB4C4CD0C1" xlink:type="locator" />
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    <link:label id="lab_bxp_EarthquakeDeductibleInsurancePercentageOfValueOfAffectedPropertySanFrancisco_9182BB2A7EE263D2D61D76EB4C4C2A32_terseLabel_en-US" xlink:label="lab_bxp_EarthquakeDeductibleInsurancePercentageOfValueOfAffectedPropertySanFrancisco_9182BB2A7EE263D2D61D76EB4C4C2A32" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deductible in insurance as a percentage of the value of the affected property, San Francisco</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_EarthquakeDeductibleInsurancePercentageOfValueOfAffectedPropertySanFrancisco" xlink:label="loc_bxp_EarthquakeDeductibleInsurancePercentageOfValueOfAffectedPropertySanFrancisco_9182BB2A7EE263D2D61D76EB4C4C2A32" xlink:type="locator" />
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_PerOccurrenceLimitOfEarthQuakeInsuranceSanFrancisco" xlink:label="loc_bxp_PerOccurrenceLimitOfEarthQuakeInsuranceSanFrancisco_2189B17BA57DBF28A35076EB4C4C0283" xlink:type="locator" />
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    <link:label id="lab_bxp_AnnualAggregateLimitOfEarthQuakeInsuranceSanFrancisco_C4266D273B392BB7CB7776EB4C4C55E1_verboseLabel_en-US" xlink:label="lab_bxp_AnnualAggregateLimitOfEarthQuakeInsuranceSanFrancisco_C4266D273B392BB7CB7776EB4C4C55E1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Annual aggregate limit of the earthquake insurance which covers San Francisco region</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_AnnualAggregateLimitOfEarthQuakeInsuranceSanFrancisco" xlink:label="loc_bxp_AnnualAggregateLimitOfEarthQuakeInsuranceSanFrancisco_C4266D273B392BB7CB7776EB4C4C55E1" xlink:type="locator" />
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    <link:label id="lab_bxp_AmountOfEarthquakeInsuranceProvidedByIxpLlcAsDirectInsurerSanFrancisco_71EAB48563637D85E47F76EB4C4CFF78_terseLabel_en-US" xlink:label="lab_bxp_AmountOfEarthquakeInsuranceProvidedByIxpLlcAsDirectInsurerSanFrancisco_71EAB48563637D85E47F76EB4C4CFF78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amount of earthquake insurance provided by IXP, LLC as direct insurer San Francisco</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_AmountOfEarthquakeInsuranceProvidedByIxpLlcAsDirectInsurerSanFrancisco" xlink:label="loc_bxp_AmountOfEarthquakeInsuranceProvidedByIxpLlcAsDirectInsurerSanFrancisco_71EAB48563637D85E47F76EB4C4CFF78" xlink:type="locator" />
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    <link:label id="lab_bxp_EarthquakeCoverageIncludedInBuildersRiskPolicyFor680Folsom_F9E476EE7C8F303A98CB76EB4C4CF4D1_terseLabel_en-US" xlink:label="lab_bxp_EarthquakeCoverageIncludedInBuildersRiskPolicyFor680Folsom_F9E476EE7C8F303A98CB76EB4C4CF4D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Earthquake Coverage Included in Builders Risk Policy for 680 Folsom</link:label>
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    <link:label id="lab_bxp_OperatingPartnershipGuaranteeToCoverLiabilitiesOfSubsidiary_03FD6606915DDC614D3F76EB4C4C8755_terseLabel_en-US" xlink:label="lab_bxp_OperatingPartnershipGuaranteeToCoverLiabilitiesOfSubsidiary_03FD6606915DDC614D3F76EB4C4C8755" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating partnership guarantee to cover liabilities of IXP</link:label>
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    <link:label id="lab_us-gaap_NoncontrollingInterestMember_A61F6F584ED4C4138284822E75932F78_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestMember_A61F6F584ED4C4138284822E75932F78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling Interests [Member]</link:label>
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    <link:label id="lab_bxp_MYLTIPTwothousandfourteenMember_08B6B3A138DCCF1339E3822E7593E60C_documentation_en-US" xlink:label="lab_bxp_MYLTIPTwothousandfourteenMember_08B6B3A138DCCF1339E3822E7593E60C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MYLTIP Two thousand fourteen [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_MYLTIPTwothousandfourteenMember" xlink:label="loc_bxp_MYLTIPTwothousandfourteenMember_08B6B3A138DCCF1339E3822E7593E60C" xlink:type="locator" />
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    <link:label id="lab_bxp_MYLTIPtwothousandfifteenMember_0E4B1367D5E190A85D42822E7593EC7F_terseLabel_en-US" xlink:label="lab_bxp_MYLTIPtwothousandfifteenMember_0E4B1367D5E190A85D42822E7593EC7F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2015 MYLTIP [Member]</link:label>
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    <link:label id="lab_bxp_MYLTIPTwothousandsixteenMember_BDF6392AB8EC86111519822E75935FF6_documentation_en-US" xlink:label="lab_bxp_MYLTIPTwothousandsixteenMember_BDF6392AB8EC86111519822E75935FF6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MYLTIP 2016 [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_MYLTIPTwothousandsixteenMember" xlink:label="loc_bxp_MYLTIPTwothousandsixteenMember_BDF6392AB8EC86111519822E75935FF6" xlink:type="locator" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_OutperformanceAwardsLongTermIncentivePlanUnitsDistributionAsPercentageOfOpUnitDistributionPriorToMeasurementDate_5F386D7DE36749D60003822E7593819D" xlink:to="lab_bxp_OutperformanceAwardsLongTermIncentivePlanUnitsDistributionAsPercentageOfOpUnitDistributionPriorToMeasurementDate_5F386D7DE36749D60003822E7593819D" xlink:type="arc" />
    <link:label id="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947_verboseLabel_en-US" xlink:label="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restriction on redemption of OP Unit to Common Stock (in years)</link:label>
    <link:label id="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947_label_en-US" xlink:label="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restriction On Redemption</link:label>
    <link:label id="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947_documentation_en-US" xlink:label="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Restriction on redemption of OP unit to Common Stock</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RestrictionOnRedemption" xlink:label="loc_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947" xlink:to="lab_bxp_RestrictionOnRedemption_F3636FF3C691FBAAD648822E75937947" xlink:type="arc" />
    <link:label id="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B_verboseLabel_en-US" xlink:label="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Redemption of OP Unit equivalence to Common Stock (in shares)</link:label>
    <link:label id="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B_label_en-US" xlink:label="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OP Unit Equivalence To Common Stock</link:label>
    <link:label id="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B_documentation_en-US" xlink:label="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">One OP Unit is equivalent to one common stock (share).</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_OpUnitEquivalenceToCommonStock" xlink:label="loc_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B" xlink:to="lab_bxp_OpUnitEquivalenceToCommonStock_1A9761F4B00F7BD671F3822E7593110B" xlink:type="arc" />
    <link:label id="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1_verboseLabel_en-US" xlink:label="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Common units of operating partnership if converted value</link:label>
    <link:label id="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1_label_en-US" xlink:label="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Units Of Operating Partnership If Converted Value</link:label>
    <link:label id="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1_documentation_en-US" xlink:label="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Units Of Operating Partnership If Converted Value</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue" xlink:label="loc_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1" xlink:to="lab_bxp_CommonUnitsOfOperatingPartnershipIfConvertedValue_03F23D36D5B172D5FEBA822E75930EF1" xlink:type="arc" />
    <link:label id="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20_terseLabel_en-US" xlink:label="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Closing price of common stock (in dollars per share)</link:label>
    <link:label id="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20_label_en-US" xlink:label="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Closing price of common stock per share</link:label>
    <link:label id="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20_documentation_en-US" xlink:label="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Stock Marketable Quoted Value Per Share</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_ClosingPriceOfCommonStockPerShare" xlink:label="loc_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20" xlink:to="lab_bxp_ClosingPriceOfCommonStockPerShare_00A201D9DE14BEC554BA822E75937E20" xlink:type="arc" />
    <link:label id="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8_terseLabel_en-US" xlink:label="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2013 MYLTIP (in units)</link:label>
    <link:label id="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8_label_en-US" xlink:label="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">2013 MYLTIP</link:label>
    <link:label id="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8_documentation_en-US" xlink:label="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2013 MYLTIP</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_A2013Myltip" xlink:label="loc_bxp_A2013Myltip_D14C59258404E957A658822E759384B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_A2013Myltip_D14C59258404E957A658822E759384B8" xlink:to="lab_bxp_A2013Myltip_D14C59258404E957A658822E759384B8" xlink:type="arc" />
    <link:label id="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503_terseLabel_en-US" xlink:label="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2014 MYLTIP (in units)</link:label>
    <link:label id="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503_label_en-US" xlink:label="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two thousand fourteen MYLTIP</link:label>
    <link:label id="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503_documentation_en-US" xlink:label="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2014 MYLTIP</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TwothousandfourteenMYLTIP" xlink:label="loc_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503" xlink:to="lab_bxp_TwothousandfourteenMYLTIP_94EC6AFA8BCD70E60E0F822E75932503" xlink:type="arc" />
    <link:label id="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E_terseLabel_en-US" xlink:label="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2015 MYLTIPS (in units)</link:label>
    <link:label id="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E_label_en-US" xlink:label="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two thousand fifteen MYLTIPS</link:label>
    <link:label id="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E_documentation_en-US" xlink:label="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2015 MYLTIPS</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TwothousandfifteenMYLTIPS" xlink:label="loc_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E" xlink:to="lab_bxp_TwothousandfifteenMYLTIPS_CB690F5515CFD9531E00822E7593216E" xlink:type="arc" />
    <link:label id="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D_terseLabel_en-US" xlink:label="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2016 MYLTIPs (in units)</link:label>
    <link:label id="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D_label_en-US" xlink:label="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two thousand sixteen MYLTIP</link:label>
    <link:label id="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D_documentation_en-US" xlink:label="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2016 MYLTIP</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TwothousandsixteenMYLTIP" xlink:label="loc_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D" xlink:to="lab_bxp_TwothousandsixteenMYLTIP_D1C18B9E1A7EF0A5CCB1822E7593040D" xlink:type="arc" />
    <link:label id="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01_terseLabel_en-US" xlink:label="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outperformance awards earned</link:label>
    <link:label id="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01_label_en-US" xlink:label="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outperformance awards earned</link:label>
    <link:label id="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01_documentation_en-US" xlink:label="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Outperformance awards earned</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_Outperformanceawardsearned" xlink:label="loc_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01" xlink:to="lab_bxp_Outperformanceawardsearned_F709FB776D8F8B92A63A822E75932D01" xlink:type="arc" />
    <link:label id="lab_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF_terseLabel_en-US" xlink:label="lab_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Potential maximum amount of Outperformance Awards earned (percent)</link:label>
    <link:label id="lab_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF_label_en-US" xlink:label="lab_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Potential maximum amount of Outperformance Awards earned (percent)</link:label>
    <link:label id="lab_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF_documentation_en-US" xlink:label="lab_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Potential maximum amount of Outperformance Awards earned (percent)</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent" xlink:label="loc_bxp_PotentialmaximumamountofOutperformanceAwardsearnedpercent_49A96411C075ADA33185822E759356CF" xlink:type="locator" />
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    <link:label id="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772_terseLabel_en-US" xlink:label="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Potential Awards Earned</link:label>
    <link:label id="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772_label_en-US" xlink:label="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Potential Awards Earned</link:label>
    <link:label id="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772_documentation_en-US" xlink:label="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Potential Awards Earned</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_PotentialAwardsEarned" xlink:label="loc_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772" xlink:to="lab_bxp_PotentialAwardsEarned_90E96D55359CE9A8A861822E7593D772" xlink:type="arc" />
    <link:label id="lab_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1_terseLabel_en-US" xlink:label="lab_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2012 OPP Units Forfeited</link:label>
    <link:label id="lab_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1_label_en-US" xlink:label="lab_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">TwoThousandTwelveOPPUnitsForfeited</link:label>
    <link:label id="lab_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1_documentation_en-US" xlink:label="lab_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">2012 OPP Unit forfeited</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TwoThousandTwelveOPPUnitsForfeited" xlink:label="loc_bxp_TwoThousandTwelveOPPUnitsForfeited_FE9B155E85092F16E4AB822FA95ABBD1" xlink:type="locator" />
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_StockholdersEquityPartnersCapitalAbstract" xlink:label="loc_bxp_StockholdersEquityPartnersCapitalAbstract_4EFBD877F28AC0DBA8E276EB4B72D6E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_StockholdersEquityPartnersCapitalAbstract_4EFBD877F28AC0DBA8E276EB4B72D6E1" xlink:to="lab_bxp_StockholdersEquityPartnersCapitalAbstract_4EFBD877F28AC0DBA8E276EB4B72D6E1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsDeclaredTableTextBlock_3DD129BFE31FDF48B26E76EB4B729097_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsDeclaredTableTextBlock_3DD129BFE31FDF48B26E76EB4B729097" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends Declared [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DividendsDeclaredTableTextBlock" xlink:label="loc_us-gaap_DividendsDeclaredTableTextBlock_3DD129BFE31FDF48B26E76EB4B729097" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsDeclaredTableTextBlock_3DD129BFE31FDF48B26E76EB4B729097" xlink:to="lab_us-gaap_DividendsDeclaredTableTextBlock_3DD129BFE31FDF48B26E76EB4B729097" xlink:type="arc" />
    <link:label id="lab_us-gaap_StatementOfFinancialPositionAbstract_50CE5167EA184E1ADA6B80F896DD5B0D_label_en-US" xlink:label="lab_us-gaap_StatementOfFinancialPositionAbstract_50CE5167EA184E1ADA6B80F896DD5B0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Statement of Financial Position [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_50CE5167EA184E1ADA6B80F896DD5B0D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4_label_en-US" xlink:label="lab_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4" xlink:to="lab_us-gaap_AssetsAbstract_2F1966AA46056712666F80F896DD87A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62_terseLabel_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Real estate, at cost (amounts includes variable interest entities (&#8220;VIEs&#8221;) at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62_label_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Investment Property, at Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAtCost" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62" xlink:to="lab_us-gaap_RealEstateInvestmentPropertyAtCost_615EF1DF638A0A66819E80F896DD7B62" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Construction in progress (amounts related to VIEs of $486,025 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525_label_en-US" xlink:label="lab_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Construction in Progress, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="loc_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525" xlink:to="lab_us-gaap_ConstructionInProgressGross_E95D23E51A0A91F2DBE680F896DD4525" xlink:type="arc" />
    <link:label id="lab_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B_terseLabel_en-US" xlink:label="lab_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Land held for future development</link:label>
    <link:label id="lab_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B_label_en-US" xlink:label="lab_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land Available for Development</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LandAvailableForDevelopment" xlink:label="loc_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B" xlink:to="lab_us-gaap_LandAvailableForDevelopment_A9285883557138F291A180F896DD3D8B" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: accumulated depreciation (includes amounts related to VIEs at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3_label_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Investment Property, Accumulated Depreciation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3" xlink:to="lab_us-gaap_RealEstateInvestmentPropertyAccumulatedDepreciation_8B1D0C018BF3D18D91DF80F896DD0BC3" xlink:type="arc" />
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3_totalLabel_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total real estate</link:label>
    <link:label id="lab_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3_label_en-US" xlink:label="lab_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Real Estate Investment Property, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RealEstateInvestmentPropertyNet" xlink:label="loc_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3" xlink:to="lab_us-gaap_RealEstateInvestmentPropertyNet_9E5A4FB1262866ED583180F896DD26C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents (amounts related to VIEs of $227,255 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3" xlink:to="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_846CA1D2B9C697363E8C80F896DDBEF3" xlink:type="arc" />
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash held in escrows (amounts related to VIEs of $3,671 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809_label_en-US" xlink:label="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash and Cash Equivalents, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809" xlink:to="lab_us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_F1589A5EED554F66DBC880F896DD6809" xlink:type="arc" />
    <link:label id="lab_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326_terseLabel_en-US" xlink:label="lab_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investments in securities</link:label>
    <link:label id="lab_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326_label_en-US" xlink:label="lab_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marketable Securities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_MarketableSecurities" xlink:label="loc_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326" xlink:to="lab_us-gaap_MarketableSecurities_FE23D707D0A3E21AEC0380F896DDF326" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Tenant and other receivables (amounts related to VIEs of $24,403 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:label="loc_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4" xlink:to="lab_us-gaap_AccountsReceivableNet_337932C48DA9E491441580F896DDC8C4" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14_verboseLabel_en-US" xlink:label="lab_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accrued rental income (amounts related to VIEs of $217,148 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14_label_en-US" xlink:label="lab_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Rent Receivables, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredRentReceivablesNet" xlink:label="loc_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14" xlink:to="lab_us-gaap_DeferredRentReceivablesNet_B6EF42011EE9A0E4E2EF80F896DD9A14" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred charges, net (amounts related to VIEs of $323,493 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548_label_en-US" xlink:label="lab_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Costs, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DeferredCosts" xlink:label="loc_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548" xlink:to="lab_us-gaap_DeferredCosts_AD7D5111E41F996C074580F896DD3548" xlink:type="arc" />
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8_terseLabel_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses and other assets (amounts related to VIEs of $77,995 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8_label_en-US" xlink:label="lab_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prepaid Expense and Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssets" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8" xlink:to="lab_us-gaap_PrepaidExpenseAndOtherAssets_0113892C360930D2B48780F896DD50F8" xlink:type="arc" />
    <link:label id="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2_verboseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Investments in unconsolidated joint ventures</link:label>
    <link:label id="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2_label_en-US" xlink:label="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures" xlink:label="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2" xlink:to="lab_us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures_86A9F8CFB6DEC0480EAB80F896DD1ED2" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491_label_en-US" xlink:label="lab_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491" xlink:to="lab_us-gaap_Assets_4461551DC6488A1487ED80F896DDB491" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES AND EQUITY / CAPITAL</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E2EAD3EB36A24E0C0F9E80F896DD4209" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LiabilitiesAbstract" xlink:label="loc_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9" xlink:to="lab_us-gaap_LiabilitiesAbstract_966C274493C6ABE6EBCE80F896DD57D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_SecuredDebt_42ED4E9409315BDF791A80F896DD125F_netLabel_en-US" xlink:label="lab_us-gaap_SecuredDebt_42ED4E9409315BDF791A80F896DD125F" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Mortgage notes payable, net (amounts related to VIEs of $2,060,838 at March 31, 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SecuredDebt" xlink:label="loc_us-gaap_SecuredDebt_42ED4E9409315BDF791A80F896DD125F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SecuredDebt_42ED4E9409315BDF791A80F896DD125F" xlink:to="lab_us-gaap_SecuredDebt_42ED4E9409315BDF791A80F896DD125F" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Unsecured line of credit</link:label>
    <link:label id="lab_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1_label_en-US" xlink:label="lab_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Line of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LineOfCredit" xlink:label="loc_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1" xlink:to="lab_us-gaap_LineOfCredit_CC1F1E230DFAEECF022680F896DDD1F1" xlink:type="arc" />
    <link:label id="lab_us-gaap_SubordinatedDebt_4BA1B399AE8DDE15E22A80F896DD5A11_terseLabel_en-US" xlink:label="lab_us-gaap_SubordinatedDebt_4BA1B399AE8DDE15E22A80F896DD5A11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Mezzanine notes payable (amounts related to VIEs of $308,142 at March 31, 2016)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SubordinatedDebt" xlink:label="loc_us-gaap_SubordinatedDebt_4BA1B399AE8DDE15E22A80F896DD5A11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SubordinatedDebt_4BA1B399AE8DDE15E22A80F896DD5A11" xlink:to="lab_us-gaap_SubordinatedDebt_4BA1B399AE8DDE15E22A80F896DD5A11" xlink:type="arc" />
    <link:label id="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE_terseLabel_en-US" xlink:label="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outside members' notes payable (amounts related to VIEs of $180,000 at March 31, 2016)</link:label>
    <link:label id="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE_label_en-US" xlink:label="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Outside member's notes payable</link:label>
    <link:label id="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE_documentation_en-US" xlink:label="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The amount for notes payable (written promise to pay), payable to outside member's, which are due after one year (or one business cycle).</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_Outsidemembersnotespayable" xlink:label="loc_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE" xlink:to="lab_bxp_Outsidemembersnotespayable_F5C276686953E9F9404480F896DDF0EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9_verboseLabel_en-US" xlink:label="lab_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Outside members' notes payable</link:label>
    <link:label id="lab_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9_label_en-US" xlink:label="lab_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Notes Payable, Related Parties, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NotesPayableRelatedPartiesNoncurrent" xlink:label="loc_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9" xlink:to="lab_us-gaap_NotesPayableRelatedPartiesNoncurrent_C85AD9C099AA8DAAA4F280F896DD71E9" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC_verboseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and accrued expenses (amounts related to VIEs of $82,270 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable and Accrued Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC" xlink:to="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_1E8E0F34FD663873CD5880F896DD66CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E_terseLabel_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Dividends and distributions payable</link:label>
    <link:label id="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E_label_en-US" xlink:label="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Dividends Payable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E" xlink:to="lab_us-gaap_DividendsPayableCurrentAndNoncurrent_65249F9E2B86C1752AFE80F896DD5B4E" xlink:type="arc" />
    <link:label id="lab_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7_verboseLabel_en-US" xlink:label="lab_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Accrued interest payable (amounts related to VIEs of $136,165 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7_label_en-US" xlink:label="lab_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Payable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="loc_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7" xlink:to="lab_us-gaap_InterestPayableCurrentAndNoncurrent_724B13796934F793A93B80F896DD30C7" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities (amounts related to VIEs of $205,007 at March 31, 2016)</link:label>
    <link:label id="lab_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4_label_en-US" xlink:label="lab_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_OtherLiabilities" xlink:label="loc_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4" xlink:to="lab_us-gaap_OtherLiabilities_6C2567A3F6004A9109C880F896DD38B4" xlink:type="arc" />
    <link:label id="lab_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A_totalLabel_en-US" xlink:label="lab_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total liabilities</link:label>
    <link:label id="lab_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A_label_en-US" xlink:label="lab_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A" xlink:to="lab_us-gaap_Liabilities_37AE3C4A101D5AAB130880F896DDF76A" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Commitments and contingencies</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A" xlink:to="lab_us-gaap_CommitmentsAndContingencies_F89F466F0FD23E404E3B80F896DDFB6A" xlink:type="arc" />
    <link:label id="lab_us-gaap_TemporaryEquityAbstract_5575B83C2ABD897D678980F896DD541D_terseLabel_en-US" xlink:label="lab_us-gaap_TemporaryEquityAbstract_5575B83C2ABD897D678980F896DD541D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling interest:</link:label>
    <link:label id="lab_us-gaap_TemporaryEquityAbstract_5575B83C2ABD897D678980F896DD541D_label_en-US" xlink:label="lab_us-gaap_TemporaryEquityAbstract_5575B83C2ABD897D678980F896DD541D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Temporary Equity [Abstract]</link:label>
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    <link:label id="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3_terseLabel_en-US" xlink:label="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">NonControlling Interest Redeemable Partnership Series Four Units Preferred Units Value</link:label>
    <link:label id="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3_label_en-US" xlink:label="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NonControlling Interest Redeemable Partnership Series Four Units Preferred Units Value</link:label>
    <link:label id="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3_documentation_en-US" xlink:label="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">NonControlling Interest Redeemable Partnership Series Four Units Preferred Units Value</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue" xlink:label="loc_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3" xlink:to="lab_bxp_NoncontrollingInterestRedeemablePartnershipSeriesFourUnitsPreferredUnitsValue_9EC7E09D35299FA6A7F380F896DD5AB3" xlink:type="arc" />
    <link:label id="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137_terseLabel_en-US" xlink:label="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redeemable partnership units&#8212;16,092,449 and 16,097,473 common units and 2,065,185 and 1,831,714 long term incentive units outstanding at redemption value at March 31, 2016 and December 31, 2015, respectively</link:label>
    <link:label id="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137_label_en-US" xlink:label="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">NonControlling Interest Redeemable Partnership Units Common Units Value</link:label>
    <link:label id="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137_documentation_en-US" xlink:label="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Amount of Noncontrolling interest redeemable partnership common units.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue" xlink:label="loc_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137" xlink:to="lab_bxp_NoncontrollingInterestRedeemablePartnershipUnitsCommonUnitsValue_2B59225372B99003A4C480F896EDF137" xlink:type="arc" />
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7F5B578FAA5A3902CA3480F896EDA4C8_terseLabel_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7F5B578FAA5A3902CA3480F896EDA4C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redeemable preferred units of the Operating Partnership</link:label>
    <link:label id="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7F5B578FAA5A3902CA3480F896EDA4C8_label_en-US" xlink:label="lab_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_7F5B578FAA5A3902CA3480F896EDA4C8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Redeemable Noncontrolling Interest, Equity, Carrying Amount</link:label>
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    <link:label id="lab_bxp_TemporaryEquityCarryingAmountRedeemableInterestInPropertyPartnerships_8EA650670D2AFBB1658980F896ED68C8_terseLabel_en-US" xlink:label="lab_bxp_TemporaryEquityCarryingAmountRedeemableInterestInPropertyPartnerships_8EA650670D2AFBB1658980F896ED68C8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Redeemable interest in property partnership</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TemporaryEquityCarryingAmountRedeemableInterestInPropertyPartnerships" xlink:label="loc_bxp_TemporaryEquityCarryingAmountRedeemableInterestInPropertyPartnerships_8EA650670D2AFBB1658980F896ED68C8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_TemporaryEquityCarryingAmountRedeemableInterestInPropertyPartnerships_8EA650670D2AFBB1658980F896ED68C8" xlink:to="lab_bxp_TemporaryEquityCarryingAmountRedeemableInterestInPropertyPartnerships_8EA650670D2AFBB1658980F896ED68C8" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Equity / Capital</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948" xlink:to="lab_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_96609AF965AC6BA77C8D80F896EDC948" xlink:type="arc" />
    <link:label id="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397_terseLabel_en-US" xlink:label="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Excess stock, $0.01 par value, 150,000,000 shares authorized, none issued or outstanding</link:label>
    <link:label id="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397_label_en-US" xlink:label="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Excess Stock Value</link:label>
    <link:label id="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397_documentation_en-US" xlink:label="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Excess Stock Value</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_ExcessStockValue" xlink:label="loc_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397" xlink:to="lab_bxp_ExcessStockValue_A0F99EBF127DA00564AF80F896ED5397" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock, $.01 par value, 50,000,000 shares authorized</link:label>
    <link:label id="lab_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E_label_en-US" xlink:label="lab_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract" xlink:label="loc_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E" xlink:to="lab_us-gaap_PreferredStockNumberOfSharesParValueAndOtherDisclosuresAbstract_CC4B7E7723870E88942D80F896ED074E" xlink:type="arc" />
    <link:label id="lab_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">5.25% Series B cumulative redeemable preferred stock / unit liquidation preference $2,500 per share / unit, 92,000 shares / units authorized, 80,000 shares / units issued and outstanding at March 31, 2016 and December 31, 2015</link:label>
    <link:label id="lab_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B_label_en-US" xlink:label="lab_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B" xlink:to="lab_us-gaap_PreferredStockValue_988D10E2691F121CFB5380F896ED5D9B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CommonStockValue_D85C1AA65FD2B77012D080F896EDE317_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_D85C1AA65FD2B77012D080F896EDE317" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Common stock, $0.01 par value, 250,000,000 shares authorized, 153,683,866 and 153,658,866 issued and 153,604,966 and 153,579,966 outstanding at March 31, 2016 and December 31, 2015, respectively</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_D85C1AA65FD2B77012D080F896EDE317" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CommonStockValue_D85C1AA65FD2B77012D080F896EDE317" xlink:to="lab_us-gaap_CommonStockValue_D85C1AA65FD2B77012D080F896EDE317" xlink:type="arc" />
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    <link:label id="lab_us-gaap_AdditionalPaidInCapital_FA5DEC492FA7736AE21380F896ED454B_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapital_FA5DEC492FA7736AE21380F896ED454B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_FA5DEC492FA7736AE21380F896ED454B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_073356C21F9888D8634E80F896EDF002_verboseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_073356C21F9888D8634E80F896EDF002" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Dividends in excess of earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_073356C21F9888D8634E80F896EDF002_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_073356C21F9888D8634E80F896EDF002" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_073356C21F9888D8634E80F896EDF002" xlink:type="locator" />
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    <link:label id="lab_us-gaap_TreasuryStockValue_C5C74A2D99D59CC1E56680F896EDDDFE_negatedLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_C5C74A2D99D59CC1E56680F896EDDDFE" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Treasury common stock at cost, 78,900 shares at March 31, 2016 and December 31, 2015</link:label>
    <link:label id="lab_us-gaap_TreasuryStockValue_C5C74A2D99D59CC1E56680F896EDDDFE_label_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_C5C74A2D99D59CC1E56680F896EDDDFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury Stock, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_C5C74A2D99D59CC1E56680F896EDDDFE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_StockholdersEquity_B57DD8542C559AAA19F380F896ED57CE_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_B57DD8542C559AAA19F380F896ED57CE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total stockholders&#8217; equity attributable to Boston Properties, Inc.</link:label>
    <link:label id="lab_us-gaap_StockholdersEquity_B57DD8542C559AAA19F380F896ED57CE_label_en-US" xlink:label="lab_us-gaap_StockholdersEquity_B57DD8542C559AAA19F380F896ED57CE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_B57DD8542C559AAA19F380F896ED57CE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NoncontrollingInterestItemsAbstract_DCD0A72BB38155B7BD3E80F896ED6952_terseLabel_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestItemsAbstract_DCD0A72BB38155B7BD3E80F896ED6952" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Noncontrolling interests:</link:label>
    <link:label id="lab_us-gaap_NoncontrollingInterestItemsAbstract_DCD0A72BB38155B7BD3E80F896ED6952_label_en-US" xlink:label="lab_us-gaap_NoncontrollingInterestItemsAbstract_DCD0A72BB38155B7BD3E80F896ED6952" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Noncontrolling Interest Items [Abstract]</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_EFA92F9944934BC7BC958628EE96BBDF_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_EFA92F9944934BC7BC958628EE96BBDF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Change in assets and liabilities:</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInRestrictedCashForOperatingActivities_DD6AD2BF1F0307E9EB4E8628EE96E435_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInRestrictedCashForOperatingActivities_DD6AD2BF1F0307E9EB4E8628EE96E435" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Cash held in escrows</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherOperatingLiabilities_55563AE846349A2384618628EE963670" xlink:type="arc" />
    <link:label id="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A_terseLabel_en-US" xlink:label="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Tenant leasing costs</link:label>
    <link:label id="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A_label_en-US" xlink:label="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Tenant leasing costs</link:label>
    <link:label id="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A_documentation_en-US" xlink:label="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Tenant leasing costs</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TenantLeasingCosts" xlink:label="loc_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A" xlink:to="lab_bxp_TenantLeasingCosts_679EDC4BDEB3CA2A829F8628EE96078A" xlink:type="arc" />
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124_totalLabel_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total adjustments</link:label>
    <link:label id="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124_label_en-US" xlink:label="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124" xlink:to="lab_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities_33B50C6DA8549530D3118628EE96A124" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_3425C5267E9FD98EC1D88628EE96FD24" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash flows from investing activities:</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_76797A9EFCB949C33E278628EE96275D" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Construction in progress</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire and Develop Real Estate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:label="loc_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7" xlink:to="lab_us-gaap_PaymentsToAcquireAndDevelopRealEstate_6A0F179F5904078626C88628EE96A2F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Building and other capital improvements</link:label>
    <link:label id="lab_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6_label_en-US" xlink:label="lab_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Capital Improvements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsForCapitalImprovements" xlink:label="loc_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6" xlink:to="lab_us-gaap_PaymentsForCapitalImprovements_18011C300E3756EA9E388628EE969EC6" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Tenant improvements</link:label>
    <link:label id="lab_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE_label_en-US" xlink:label="lab_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for Tenant Improvements</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsForTenantImprovements" xlink:label="loc_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE" xlink:to="lab_us-gaap_PaymentsForTenantImprovements_5AF6B076FF7989FA0DBA8628EE9621EE" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseInRestrictedCash_DF91D286003BF07BDFE58628EE96916B_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseInRestrictedCash_DF91D286003BF07BDFE58628EE96916B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of real estate placed in escrow</link:label>
    <link:label id="lab_us-gaap_IncreaseInRestrictedCash_DF91D286003BF07BDFE58628EE96916B_label_en-US" xlink:label="lab_us-gaap_IncreaseInRestrictedCash_DF91D286003BF07BDFE58628EE96916B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase in Restricted Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_IncreaseInRestrictedCash" xlink:label="loc_us-gaap_IncreaseInRestrictedCash_DF91D286003BF07BDFE58628EE96916B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DecreaseInRestrictedCash_C83A6DE66E18A87132A98628EE96263E_terseLabel_en-US" xlink:label="lab_us-gaap_DecreaseInRestrictedCash_C83A6DE66E18A87132A98628EE96263E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sales of real estate released from escrow</link:label>
    <link:label id="lab_us-gaap_DecreaseInRestrictedCash_C83A6DE66E18A87132A98628EE96263E_label_en-US" xlink:label="lab_us-gaap_DecreaseInRestrictedCash_C83A6DE66E18A87132A98628EE96263E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Decrease in Restricted Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DecreaseInRestrictedCash" xlink:label="loc_us-gaap_DecreaseInRestrictedCash_C83A6DE66E18A87132A98628EE96263E" xlink:type="locator" />
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    <link:label id="lab_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108_terseLabel_en-US" xlink:label="lab_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash released from scrow for land sale contracts</link:label>
    <link:label id="lab_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108_label_en-US" xlink:label="lab_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash released from scrow for land sale contracts</link:label>
    <link:label id="lab_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108_documentation_en-US" xlink:label="lab_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash released from scrow for land sale contracts</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_Cashreleasedfromscrowforlandsalecontracts" xlink:label="loc_bxp_Cashreleasedfromscrowforlandsalecontracts_072D7D419AE19208258B8628EE962108" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_38F6458499328EBB56EC8628EE96908E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_38F6458499328EBB56EC8628EE96908E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deposit on real estate</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_38F6458499328EBB56EC8628EE96908E_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_38F6458499328EBB56EC8628EE96908E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Deposits on Real Estate Acquisitions</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions" xlink:label="loc_us-gaap_PaymentsForProceedsFromDepositsOnRealEstateAcquisitions_38F6458499328EBB56EC8628EE96908E" xlink:type="locator" />
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    <link:label id="lab_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76_negatedTerseLabel_en-US" xlink:label="lab_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Cash placed in escrow for land sale contracts</link:label>
    <link:label id="lab_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76_label_en-US" xlink:label="lab_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash placed in escrow for land sale contracts</link:label>
    <link:label id="lab_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76_documentation_en-US" xlink:label="lab_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Cash placed in escrow for land sale contracts</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_Cashplacedinescrowforlandsalecontracts" xlink:label="loc_bxp_Cashplacedinescrowforlandsalecontracts_CBCDE5CD5A370E8672998628EE963B76" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAcquiredFromAcquisition_4374550E04B0713C7F6F8628EE96C373_terseLabel_en-US" xlink:label="lab_us-gaap_CashAcquiredFromAcquisition_4374550E04B0713C7F6F8628EE96C373" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash recorded upon consolidation</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaap_CashAcquiredFromAcquisition_4374550E04B0713C7F6F8628EE96C373" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquireNotesReceivable_A0CD648F7F08682C86BA8628EE964FBB_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireNotesReceivable_A0CD648F7F08682C86BA8628EE964FBB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayments of notes receivable, net</link:label>
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_A370225A35B227610AD78628EE9665D1_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_A370225A35B227610AD78628EE9665D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
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    <link:label id="lab_us-gaap_InterestCostsCapitalized_E16B8DDB7F90DA8F43C08628EE962EB9_label_en-US" xlink:label="lab_us-gaap_InterestCostsCapitalized_E16B8DDB7F90DA8F43C08628EE962EB9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Costs Capitalized</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_0E5331D53006B21B96818134DC45550D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StatementGeographicalAxis_0E5331D53006B21B96818134DC45550D" xlink:to="lab_us-gaap_StatementGeographicalAxis_0E5331D53006B21B96818134DC45550D" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:label id="lab_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492_label_en-US" xlink:label="lab_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Geographical [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492" xlink:to="lab_us-gaap_SegmentGeographicalDomain_59120B2DC771148D195B8134DC455492" xlink:type="arc" />
    <link:label id="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D_terseLabel_en-US" xlink:label="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Boston [Member]</link:label>
    <link:label id="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D_label_en-US" xlink:label="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Boston [Member]</link:label>
    <link:label id="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D_documentation_en-US" xlink:label="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Boston [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_BostonMember" xlink:label="loc_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D" xlink:to="lab_bxp_BostonMember_7ACA4FC7378D9759D2898134DC451D0D" xlink:type="arc" />
    <link:label id="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF_terseLabel_en-US" xlink:label="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New York [Member]</link:label>
    <link:label id="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF_label_en-US" xlink:label="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">New York [Member]</link:label>
    <link:label id="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF_documentation_en-US" xlink:label="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">New York [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_NewYorkMember" xlink:label="loc_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF" xlink:to="lab_bxp_NewYorkMember_9CC6D0E7C23B4E3C8AE18134DC45F8AF" xlink:type="arc" />
    <link:label id="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69_terseLabel_en-US" xlink:label="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">San Francisco [Member]</link:label>
    <link:label id="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69_label_en-US" xlink:label="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">San Francisco [Member]</link:label>
    <link:label id="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69_documentation_en-US" xlink:label="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">San Francisco [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_SanFranciscoMember" xlink:label="loc_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69" xlink:to="lab_bxp_SanFranciscoMember_06438476A64BCCA099FF8134DC45CC69" xlink:type="arc" />
    <link:label id="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572_terseLabel_en-US" xlink:label="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Washington, DC [Member]</link:label>
    <link:label id="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572_label_en-US" xlink:label="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Washington D C [Member]</link:label>
    <link:label id="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572_documentation_en-US" xlink:label="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Washington D C [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_WashingtonDCMember" xlink:label="loc_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572" xlink:to="lab_bxp_WashingtonDCMember_1FD5CCB0869E7C09BEBE8134DC451572" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:label id="lab_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444_label_en-US" xlink:label="lab_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Segment Reporting Information [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444" xlink:to="lab_us-gaap_SegmentReportingInformationLineItems_A06A6C7B9E83F29E1C188134DC452444" xlink:type="arc" />
    <link:label id="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82_terseLabel_en-US" xlink:label="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rental Revenue: Office</link:label>
    <link:label id="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82_label_en-US" xlink:label="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rental Revenue Class A Office</link:label>
    <link:label id="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82_documentation_en-US" xlink:label="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rental Revenue Class A Office</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RentalRevenueClassOffice" xlink:label="loc_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82" xlink:to="lab_bxp_RentalRevenueClassOffice_B385B62FF57B13E726728134DC45FC82" xlink:type="arc" />
    <link:label id="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928_terseLabel_en-US" xlink:label="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rental Revenue: Residential</link:label>
    <link:label id="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928_label_en-US" xlink:label="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rental Revenue Residential</link:label>
    <link:label id="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928_documentation_en-US" xlink:label="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rental Revenue Residential.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RentalRevenueResidential" xlink:label="loc_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928" xlink:to="lab_bxp_RentalRevenueResidential_7AF85410644B0D10C1D78134DC45B928" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rental Revenue: Hotel</link:label>
    <link:label id="lab_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0_label_en-US" xlink:label="lab_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Hotels</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_RevenueFromLeasedAndOwnedHotels" xlink:label="loc_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0" xlink:to="lab_us-gaap_RevenueFromLeasedAndOwnedHotels_F1508E662F3BCCDC66C08134DC4594A0" xlink:type="arc" />
    <link:label id="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229_totalLabel_en-US" xlink:label="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total revenue</link:label>
    <link:label id="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229_label_en-US" xlink:label="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rental Revenue Total</link:label>
    <link:label id="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229_documentation_en-US" xlink:label="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rental Revenue Total</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RentalRevenueTotal" xlink:label="loc_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229" xlink:to="lab_bxp_RentalRevenueTotal_558F65787CBE1723B8798134DC454229" xlink:type="arc" />
    <link:label id="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592_verboseLabel_en-US" xlink:label="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Rental Revenue: % of Grand Totals</link:label>
    <link:label id="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592_label_en-US" xlink:label="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Of Total Revenue</link:label>
    <link:label id="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592_documentation_en-US" xlink:label="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">These are percentages not monetary value</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_PercentageOfTotalRevenue" xlink:label="loc_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592" xlink:to="lab_bxp_PercentageOfTotalRevenue_8CB9A9E8E7BE4925CE628134DC45B592" xlink:type="arc" />
    <link:label id="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931_verboseLabel_en-US" xlink:label="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Rental Expenses: Office</link:label>
    <link:label id="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931_label_en-US" xlink:label="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rental Expenses Class Office</link:label>
    <link:label id="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931_documentation_en-US" xlink:label="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rental Expenses Class Office</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RentalExpensesClassOffice" xlink:label="loc_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931" xlink:to="lab_bxp_RentalExpensesClassOffice_755A977B7FA2BFE5DE0A8134DC453931" xlink:type="arc" />
    <link:label id="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5_verboseLabel_en-US" xlink:label="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Rental Expenses: Residential</link:label>
    <link:label id="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5_label_en-US" xlink:label="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Rental Expenses Residential</link:label>
    <link:label id="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5_documentation_en-US" xlink:label="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Rental Expenses Residential.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RentalExpensesResidential" xlink:label="loc_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5" xlink:to="lab_bxp_RentalExpensesResidential_A2FEE3E3663E3098C0D58134DC45BDE5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DirectCostsOfHotels_B545FCA2E8CEF0A401F48134DC4537D4_terseLabel_en-US" xlink:label="lab_us-gaap_DirectCostsOfHotels_B545FCA2E8CEF0A401F48134DC4537D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Rental Expenses: Hotel</link:label>
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    <link:label id="lab_bxp_NonQualifiedStockOptionsMember_8B38FE9F35D845808DDD76EB4B24A423_documentation_en-US" xlink:label="lab_bxp_NonQualifiedStockOptionsMember_8B38FE9F35D845808DDD76EB4B24A423" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non Qualified Stock Options [Member]</link:label>
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    <link:label id="lab_us-gaap_CommonStockSharesIssued_C59BE0422403459BC04476EB4B244A89_netLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_C59BE0422403459BC04476EB4B244A89" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="en-US">Shares issued</link:label>
    <link:label id="lab_us-gaap_CommonStockSharesIssued_C59BE0422403459BC04476EB4B244A89_label_en-US" xlink:label="lab_us-gaap_CommonStockSharesIssued_C59BE0422403459BC04476EB4B244A89" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Shares, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_C59BE0422403459BC04476EB4B244A89" xlink:type="locator" />
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    <link:label id="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26_terseLabel_en-US" xlink:label="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LTIP units issued (in shares)</link:label>
    <link:label id="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26_label_en-US" xlink:label="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">LTIP units issued</link:label>
    <link:label id="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26_documentation_en-US" xlink:label="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">LTIP units issued</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_LtipUnitsIssued" xlink:label="loc_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26" xlink:to="lab_bxp_LtipUnitsIssued_A90E70C9D4455F59605776EB4B24FC26" xlink:type="arc" />
    <link:label id="lab_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2_terseLabel_en-US" xlink:label="lab_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">MYLTIP units issued (in shares)</link:label>
    <link:label id="lab_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2_label_en-US" xlink:label="lab_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">MYLTIP units issued</link:label>
    <link:label id="lab_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2_documentation_en-US" xlink:label="lab_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">MYLTIP units issued</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_MyltipUnitsIssued" xlink:label="loc_bxp_MyltipUnitsIssued_92B57BBE6F5540D2A2E276EB4B24B0B2" xlink:type="locator" />
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    <link:label id="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C_terseLabel_en-US" xlink:label="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-qualified stock options issued</link:label>
    <link:label id="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C_label_en-US" xlink:label="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non-qualified stock options issued</link:label>
    <link:label id="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C_documentation_en-US" xlink:label="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non Qualified Stock Options Issued</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_NonQualifiedStockOptionsIssued" xlink:label="loc_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C" xlink:to="lab_bxp_NonQualifiedStockOptionsIssued_6DA15431F637EBB7E49376EB4B24C04C" xlink:type="arc" />
    <link:label id="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278_terseLabel_en-US" xlink:label="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee and director payment per share (in dollars per share)</link:label>
    <link:label id="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278_label_en-US" xlink:label="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee and director payment per share</link:label>
    <link:label id="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278_documentation_en-US" xlink:label="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee and director payment per share</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_EmployeeAndDirectorPaymentPerShare" xlink:label="loc_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278" xlink:to="lab_bxp_EmployeeAndDirectorPaymentPerShare_2D7851185EAB4C2CA79376EB4B24C278" xlink:type="arc" />
    <link:label id="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6_verboseLabel_en-US" xlink:label="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Vesting annual installments</link:label>
    <link:label id="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6_label_en-US" xlink:label="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Vesting Annual Installments</link:label>
    <link:label id="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6_documentation_en-US" xlink:label="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Vesting period for grants of restricted stock and LTIP Units made in and after November 2006.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_VestingAnnualInstallments" xlink:label="loc_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6" xlink:to="lab_bxp_VestingAnnualInstallments_5A55EA33207C0F36A8B476EB4B2457F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_3975635CE68B83BDA28076EB4B2403A2_terseLabel_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_3975635CE68B83BDA28076EB4B2403A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stock based Compensation Expense</link:label>
    <link:label id="lab_us-gaap_AllocatedShareBasedCompensationExpense_3975635CE68B83BDA28076EB4B2403A2_label_en-US" xlink:label="lab_us-gaap_AllocatedShareBasedCompensationExpense_3975635CE68B83BDA28076EB4B2403A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Allocated Share-based Compensation Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_3975635CE68B83BDA28076EB4B2403A2" xlink:type="locator" />
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    <link:label id="lab_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF_terseLabel_en-US" xlink:label="lab_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acceleration of Stock Basec Compensation and Stock Based Compensation Associated with Transition Agreement</link:label>
    <link:label id="lab_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF_label_en-US" xlink:label="lab_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Acceleration of Stock Basec Compensation and Stock Based Compensation Associated with Transition Agreement</link:label>
    <link:label id="lab_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF_documentation_en-US" xlink:label="lab_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Acceleration of Stock Basec Compensation and Stock Based Compensation Associated with Transition Agreement</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement" xlink:label="loc_bxp_AccelerationOfStockBasecCompensationAndStockBasedCompensationAssociatedWithTransitionAgreement_AE9DC9CCE252A5B9912476EB4B2471FF" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_961015D830302101D0F276EB4B24DF64_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_961015D830302101D0F276EB4B24DF64" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unrecognized compensation expenses</link:label>
    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_961015D830302101D0F276EB4B24DF64_label_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_961015D830302101D0F276EB4B24DF64" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_961015D830302101D0F276EB4B24DF64" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_50D5BE8ED79E4B9CF99B76EB4B24E7F7_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_50D5BE8ED79E4B9CF99B76EB4B24E7F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Weighted-average period (years)</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_50D5BE8ED79E4B9CF99B76EB4B24E7F7" xlink:type="locator" />
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    <link:label id="lab_bxp_CommonStockWeightedAveragePrice_2FC397BCC29A252BA72F76EB4B24E45D_terseLabel_en-US" xlink:label="lab_bxp_CommonStockWeightedAveragePrice_2FC397BCC29A252BA72F76EB4B24E45D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Employee's weighted average cost per share (in dollars per share)</link:label>
    <link:label id="lab_bxp_CommonStockWeightedAveragePrice_2FC397BCC29A252BA72F76EB4B24E45D_label_en-US" xlink:label="lab_bxp_CommonStockWeightedAveragePrice_2FC397BCC29A252BA72F76EB4B24E45D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock Weighted Average Price</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_CommonStockWeightedAveragePrice" xlink:label="loc_bxp_CommonStockWeightedAveragePrice_2FC397BCC29A252BA72F76EB4B24E45D" xlink:type="locator" />
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    <link:label id="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD_terseLabel_en-US" xlink:label="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Value of LTIP units issued</link:label>
    <link:label id="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD_label_en-US" xlink:label="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Value Of LTIP Units Issued</link:label>
    <link:label id="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD_documentation_en-US" xlink:label="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Value Of LTIP Units Issued.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_ValueOfLtipUnitsIssued" xlink:label="loc_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD" xlink:to="lab_bxp_ValueOfLtipUnitsIssued_D20F75973739211C6D3976EB4B2444FD" xlink:type="arc" />
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_TransactionCostsExpensed" xlink:label="loc_bxp_TransactionCostsExpensed_8E1FE78D3BEA7E93252B76EB4D361267" xlink:type="locator" />
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_SquareFourZeroSevenLimitedPartnershipMember" xlink:label="loc_bxp_SquareFourZeroSevenLimitedPartnershipMember_896416F68840F14D8FC5EBAC60752C60" xlink:type="locator" />
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    <link:label id="lab_bxp_MetropolitanSquareAssociatesLlcMember_1A75D4F2E2989D572F42EBAC60750946_terseLabel_en-US" xlink:label="lab_bxp_MetropolitanSquareAssociatesLlcMember_1A75D4F2E2989D572F42EBAC60750946" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">The Metropolitan Square Associates LLC [Member]</link:label>
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    <link:label id="lab_bxp_MetropolitanSquareAssociatesLlcMember_1A75D4F2E2989D572F42EBAC60750946_documentation_en-US" xlink:label="lab_bxp_MetropolitanSquareAssociatesLlcMember_1A75D4F2E2989D572F42EBAC60750946" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The Metropolitan Square Associates LLC [Member]</link:label>
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    <link:label id="lab_bxp_WpProjectDeveloperLlcMember_F42E864968B497BCC3DAEBAC60754162_documentation_en-US" xlink:label="lab_bxp_WpProjectDeveloperLlcMember_F42E864968B497BCC3DAEBAC60754162" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">WP Project Developer LLC [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_WpProjectDeveloperLlcMember" xlink:label="loc_bxp_WpProjectDeveloperLlcMember_F42E864968B497BCC3DAEBAC60754162" xlink:type="locator" />
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_EntityOwningLandAndInfrastructureOfProjectMember" xlink:label="loc_bxp_EntityOwningLandAndInfrastructureOfProjectMember_9209A48BE25814970153EBAC60754B54" xlink:type="locator" />
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    <link:label id="lab_bxp_RbpJointVentureLlcMember_7597684977A926F27DF5EBAC6075CF53_terseLabel_en-US" xlink:label="lab_bxp_RbpJointVentureLlcMember_7597684977A926F27DF5EBAC6075CF53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">RBP Joint Venture LLC [Member]</link:label>
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    <link:label id="lab_bxp_RbpJointVentureLlcMember_7597684977A926F27DF5EBAC6075CF53_documentation_en-US" xlink:label="lab_bxp_RbpJointVentureLlcMember_7597684977A926F27DF5EBAC6075CF53" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">RBP Joint Venture LLC [Member]</link:label>
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    <link:label id="lab_bxp_BostonPropertiesOfficeValueAddedFundLpMember_4304D78861747AF36612EBAC6075EC8B_terseLabel_en-US" xlink:label="lab_bxp_BostonPropertiesOfficeValueAddedFundLpMember_4304D78861747AF36612EBAC6075EC8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Boston Properties Office Value-Added Fund, L.P. [Member]</link:label>
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    <link:loc xlink:href="bxp-20160331.xsd#bxp_BostonPropertiesOfficeValueAddedFundLpMember" xlink:label="loc_bxp_BostonPropertiesOfficeValueAddedFundLpMember_4304D78861747AF36612EBAC6075EC8B" xlink:type="locator" />
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    <link:label id="lab_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610_terseLabel_en-US" xlink:label="lab_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Annapolis Junction NFM, LLC [Member]</link:label>
    <link:label id="lab_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610_label_en-US" xlink:label="lab_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Annapolis Junction Nfm Llc [Member]</link:label>
    <link:label id="lab_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610_documentation_en-US" xlink:label="lab_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Annapolis Junction NFM LLC [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_AnnapolisJunctionNfmLlcMember" xlink:label="loc_bxp_AnnapolisJunctionNfmLlcMember_C11610A320D6510D1E2DEBAC6075F610" xlink:type="locator" />
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    <link:label id="lab_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F_terseLabel_en-US" xlink:label="lab_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2 GCT Venture LLC [Member]</link:label>
    <link:label id="lab_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F_label_en-US" xlink:label="lab_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Two Gct Venture Llc [Member]</link:label>
    <link:label id="lab_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F_documentation_en-US" xlink:label="lab_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Two GCT Venture LLC [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_TwoGctVentureLlcMember" xlink:label="loc_bxp_TwoGctVentureLlcMember_B0EABFC59D91D3963943EBAC6075804F" xlink:type="locator" />
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    <link:label id="lab_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6_terseLabel_en-US" xlink:label="lab_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">540 Madison Venture LLC [Member]</link:label>
    <link:label id="lab_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6_label_en-US" xlink:label="lab_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Five Four Zero Madison Venture Llc [Member]</link:label>
    <link:label id="lab_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6_documentation_en-US" xlink:label="lab_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Five Four Zero Madison Venture LLC [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_FiveFourZeroMadisonVentureLlcMember" xlink:label="loc_bxp_FiveFourZeroMadisonVentureLlcMember_697DE8F4131845F2A782EBAC6075DDB6" xlink:type="locator" />
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    <link:label id="lab_bxp_NumberOfBuildingsUnderConstruction_7BCFE13B38444287BEDBEBAC60757B78_terseLabel_en-US" xlink:label="lab_bxp_NumberOfBuildingsUnderConstruction_7BCFE13B38444287BEDBEBAC60757B78" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of buildings under construction</link:label>
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    <link:label id="lab_bxp_ParcelsOfUndevelopedLand_65A2037A9A6D47D0BE4FEBAC6075C6BE_terseLabel_en-US" xlink:label="lab_bxp_ParcelsOfUndevelopedLand_65A2037A9A6D47D0BE4FEBAC6075C6BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Parcels of undeveloped land</link:label>
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    <link:label id="lab_bxp_Minimumsquarefootagetomakeapotentialadditionalpaymenttojointventurepartnerinsqft_40B21F6589EBA2571458EBAC60753EA4_terseLabel_en-US" xlink:label="lab_bxp_Minimumsquarefootagetomakeapotentialadditionalpaymenttojointventurepartnerinsqft_40B21F6589EBA2571458EBAC60753EA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Minimum square footage to make a potential additional payment to joint venture partner (in sqft)</link:label>
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    <link:label id="lab_bxp_Aggregatepurchaseprice_F5667749BF45E3257903E7B566B51478_terseLabel_en-US" xlink:label="lab_bxp_Aggregatepurchaseprice_F5667749BF45E3257903E7B566B51478" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Aggregate purchase price</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_D2490A3AB1DDEB9C45E4E7B566B5DB62_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesLongTermDebt_D2490A3AB1DDEB9C45E4E7B566B5DB62" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Indebtedness assumed</link:label>
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    <link:label id="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552_terseLabel_en-US" xlink:label="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Issuer [Axis]</link:label>
    <link:label id="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552_label_en-US" xlink:label="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Issuer [Axis]</link:label>
    <link:label id="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552_documentation_en-US" xlink:label="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hedging Issuer [Axis]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_HedgingIssuerAxis" xlink:label="loc_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552" xlink:to="lab_bxp_HedgingIssuerAxis_A2771824F9B2936358868193558BD552" xlink:type="arc" />
    <link:label id="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4_terseLabel_en-US" xlink:label="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hedging Issuer [Domain]</link:label>
    <link:label id="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4_label_en-US" xlink:label="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hedging Issuer [Domain]</link:label>
    <link:label id="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4_documentation_en-US" xlink:label="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">[Domain] for Hedging Issuer [Axis]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_HedgingIssuerDomain" xlink:label="loc_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4" xlink:to="lab_bxp_HedgingIssuerDomain_51448423AE1181E5820B8193558B33E4" xlink:type="arc" />
    <link:label id="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B_terseLabel_en-US" xlink:label="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">767 Fifth Partners LLC [Member]</link:label>
    <link:label id="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B_label_en-US" xlink:label="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Seven six seven Fifth Partners LLC [Member]</link:label>
    <link:label id="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B_documentation_en-US" xlink:label="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">767 Fifth Partners LLC [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_SevensixsevenFifthPartnersLLCMember" xlink:label="loc_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B" xlink:to="lab_bxp_SevensixsevenFifthPartnersLLCMember_F21C6D1D2E07633CF10A8193558BCD3B" xlink:type="arc" />
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_D2F8CBE9B88B0873C3F68193558B4655_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_D2F8CBE9B88B0873C3F68193558B4655" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:label id="lab_us-gaap_DerivativeInstrumentRiskAxis_D2F8CBE9B88B0873C3F68193558B4655_label_en-US" xlink:label="lab_us-gaap_DerivativeInstrumentRiskAxis_D2F8CBE9B88B0873C3F68193558B4655" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Instrument [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_D2F8CBE9B88B0873C3F68193558B4655" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_D7EFDB4CB94A6442DE808193558B38F1_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_D7EFDB4CB94A6442DE808193558B38F1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:label id="lab_us-gaap_DerivativeContractTypeDomain_D7EFDB4CB94A6442DE808193558B38F1_label_en-US" xlink:label="lab_us-gaap_DerivativeContractTypeDomain_D7EFDB4CB94A6442DE808193558B38F1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Derivative Contract [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_D7EFDB4CB94A6442DE808193558B38F1" xlink:type="locator" />
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    <link:label id="lab_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C_terseLabel_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:label id="lab_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C_label_en-US" xlink:label="lab_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_InterestRateSwapMember" xlink:label="loc_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C" xlink:to="lab_us-gaap_InterestRateSwapMember_E080F6E4CCD052DE742C8193558BF04C" xlink:type="arc" />
    <link:label id="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B_terseLabel_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range 2.129% - 2.571% [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B_label_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point one two nine percent to two point five seven one percent [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B_documentation_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point one two nine percent to two point five seven one percent [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember" xlink:label="loc_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B" xlink:to="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointfivesevenonepercentMember_8ED1AAF77894C34486BD81A65755677B" xlink:type="arc" />
    <link:label id="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7_terseLabel_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range 2.336% - 2.950% [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7_label_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point three three six percent to two point nine five zero percent [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7_documentation_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point three three six percent to two point nine five zero percent [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember" xlink:label="loc_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7" xlink:to="lab_bxp_InterestRateSwapRangetwopointthreethreesixpercenttotwopointninefivezeropercentMember_19B94CFEEA49491B27E481A6579B64F7" xlink:type="arc" />
    <link:label id="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD_terseLabel_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range 2.348% - 2.571% [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD_label_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point three four eight percent to two point five seven one percent [Member] [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD_documentation_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point three four eight percent to two point five seven one percent</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember" xlink:label="loc_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD" xlink:to="lab_bxp_InterestRateSwapRangetwopointthreefoureightpercenttotwopointfivesevenonepercentMemberMember_44236E46A87FC69FB092819BC4E679DD" xlink:type="arc" />
    <link:label id="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93_terseLabel_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range 2.129% - 2.325% [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93_label_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point one two nine percent to two point three two five percent [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93_documentation_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point one two nine percent to two point three two five percent [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember" xlink:label="loc_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93" xlink:to="lab_bxp_InterestRateSwapRangetwopointonetwoninepercenttotwopointthreetwofivepercentMember_187B97E95A439B8D47458193FF779E93" xlink:type="arc" />
    <link:label id="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174_terseLabel_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range 2.677% - 2.950% [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174_label_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point six seven seven percent to two point nine five zero percent [Member]</link:label>
    <link:label id="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174_documentation_en-US" xlink:label="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interest Rate Swap Range two point six seven seven percent to two point nine five zero percent [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember" xlink:label="loc_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174" xlink:to="lab_bxp_InterestRateSwapRangetwopointsixsevensevenpercenttotwopointninefivezeropercentMember_C64BD6B2FA632037D5FF81AEAD39F174" xlink:type="arc" />
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    <link:label id="lab_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC_label_en-US" xlink:label="lab_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Office Properties Under Construction [Member]</link:label>
    <link:label id="lab_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC_documentation_en-US" xlink:label="lab_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Office Properties Under Construction [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_OfficePropertiesUnderConstructionMember" xlink:label="loc_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC" xlink:to="lab_bxp_OfficePropertiesUnderConstructionMember_4C2FF4221604D94FC9238622DD73B7BC" xlink:type="arc" />
    <link:label id="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D_terseLabel_en-US" xlink:label="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Office Technical Properties [Member]</link:label>
    <link:label id="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D_label_en-US" xlink:label="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Office Technical Properties [Member]</link:label>
    <link:label id="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D_documentation_en-US" xlink:label="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Office/Technical Properties [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_OfficeTechnicalPropertiesMember" xlink:label="loc_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D" xlink:to="lab_bxp_OfficeTechnicalPropertiesMember_9A18C0FC8E65302FA7508622DD73185D" xlink:type="arc" />
    <link:label id="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B_terseLabel_en-US" xlink:label="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hotel Property [ Member]</link:label>
    <link:label id="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B_label_en-US" xlink:label="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Hotel Property [Member]</link:label>
    <link:label id="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B_documentation_en-US" xlink:label="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Hotel Property [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_HotelPropertyMember" xlink:label="loc_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B" xlink:to="lab_bxp_HotelPropertyMember_4DE86BA2E9A9CBAFB9908622DD73595B" xlink:type="arc" />
    <link:label id="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02_terseLabel_en-US" xlink:label="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retail Properties [ Member]</link:label>
    <link:label id="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02_label_en-US" xlink:label="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retail Properties [Member]</link:label>
    <link:label id="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02_documentation_en-US" xlink:label="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Retail Properties [Member].</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RetailPropertiesMember" xlink:label="loc_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02" xlink:to="lab_bxp_RetailPropertiesMember_4B0D63CA465B231669448622DD73FD02" xlink:type="arc" />
    <link:label id="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980_terseLabel_en-US" xlink:label="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retail Properties Under Construction [Member]</link:label>
    <link:label id="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980_label_en-US" xlink:label="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retail Properties Under Construction [Member]</link:label>
    <link:label id="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980_documentation_en-US" xlink:label="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Retail Properties Under Construction [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RetailPropertiesUnderConstructionMember" xlink:label="loc_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980" xlink:to="lab_bxp_RetailPropertiesUnderConstructionMember_911DA410DBCF0BF1E7CF8622DD734980" xlink:type="arc" />
    <link:label id="lab_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95_terseLabel_en-US" xlink:label="lab_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential Properties [Member]</link:label>
    <link:label id="lab_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95_label_en-US" xlink:label="lab_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Real Estate [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_ResidentialRealEstateMember" xlink:label="loc_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95" xlink:to="lab_us-gaap_ResidentialRealEstateMember_E7DF44DC3A306234D74F8622DD730D95" xlink:type="arc" />
    <link:label id="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788_terseLabel_en-US" xlink:label="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Residential Properties Under Construction [Member]</link:label>
    <link:label id="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788_label_en-US" xlink:label="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Residential Properties Under Construction [Member]</link:label>
    <link:label id="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788_documentation_en-US" xlink:label="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Residential Properties Under Construction [Member]</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_ResidentialPropertiesUnderConstructionMember" xlink:label="loc_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788" xlink:to="lab_bxp_ResidentialPropertiesUnderConstructionMember_A9EF53D608417FB8670F8622DD737788" xlink:type="arc" />
    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918_terseLabel_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General and limited partnership interest in the operating partnership (percent)</link:label>
    <link:label id="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918_label_en-US" xlink:label="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd#us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest" xlink:label="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918" xlink:to="lab_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest_F327C7A5C13366C21CB08622DD731918" xlink:type="arc" />
    <link:label id="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F_terseLabel_en-US" xlink:label="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restriction on redemption of OP units from date of issuance (years)</link:label>
    <link:label id="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F_label_en-US" xlink:label="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restriction On Redemption Of OP Units From Date Of Issuance In Years</link:label>
    <link:label id="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F_documentation_en-US" xlink:label="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Restriction On Redemption Of OP Units From Date Of Issuance In Years</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears" xlink:label="loc_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F" xlink:to="lab_bxp_RestrictionOnRedemptionOfOpUnitsFromDateOfIssuanceInYears_7293A99108E32C0EA1198622DD73E65F" xlink:type="arc" />
    <link:label id="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA_terseLabel_en-US" xlink:label="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">in lieu of a cash redemption OP unit to Common Stock conversion (in shares)</link:label>
    <link:label id="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA_label_en-US" xlink:label="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">in lieu of a cash redemption OP unit to Common Stock conversion</link:label>
    <link:label id="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA_documentation_en-US" xlink:label="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">in lieu of a cash redemption OP unit to Common Stock conversion</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_InlieuofacashredemptionOPunittoCommonStockconversion" xlink:label="loc_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA" xlink:to="lab_bxp_InlieuofacashredemptionOPunittoCommonStockconversion_E5C0D27DFFC1AD6CE7A78622DD7393BA" xlink:type="arc" />
    <link:label id="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0_terseLabel_en-US" xlink:label="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">One OP unit is equivalent to one share of Common Stock (in shares)</link:label>
    <link:label id="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0_label_en-US" xlink:label="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock Conversion Rate</link:label>
    <link:label id="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0_documentation_en-US" xlink:label="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Common Stock Conversion Rate</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_CommonStockConversionRate" xlink:label="loc_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0" xlink:to="lab_bxp_CommonStockConversionRate_3B6C772932DFD2A164C08622DD73A1C0" xlink:type="arc" />
    <link:label id="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F_terseLabel_en-US" xlink:label="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OP unit conversion rate (in shares)</link:label>
    <link:label id="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F_label_en-US" xlink:label="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">OP Unit Conversion Rate</link:label>
    <link:label id="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F_documentation_en-US" xlink:label="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">OP Unit Conversion Rate.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_OpUnitConversionRate" xlink:label="loc_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F" xlink:to="lab_bxp_OpUnitConversionRate_7A7D73FDF53A2C834ADF8622DD83279F" xlink:type="arc" />
    <link:label id="lab_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52_terseLabel_en-US" xlink:label="lab_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number Of Series Of Preferred Units Outstanding</link:label>
    <link:label id="lab_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52_label_en-US" xlink:label="lab_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Series Of Preferred Units Outstanding</link:label>
    <link:label id="lab_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52_documentation_en-US" xlink:label="lab_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number Of Series Of Preferred Units Outstanding.</link:label>
    <link:loc xlink:href="bxp-20160331.xsd#bxp_NumberOfSeriesOfPreferredUnitsOutstanding" xlink:label="loc_bxp_NumberOfSeriesOfPreferredUnitsOutstanding_1F4F248AA1E6AD9F10D38622DD833B52" xlink:type="locator" />
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