<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:13d447a9-172f-419a-a38d-181f41eae5ff,g:0b046c74-633b-425e-b045-7121dc8b0c40-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:bdn="http://www.brandywinerealty.com/20210331" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.brandywinerealty.com/20210331">
  <xs:import namespace="http://fasb.org/srt/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2020-01-31" schemaLocation="https://xbrl.sec.gov/dei/2020/dei-2020-01-31.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="bdn-20210331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="bdn-20210331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="bdn-20210331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="bdn-20210331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.brandywinerealty.com/role/CoverPage">
        <link:definition>0001001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheets">
        <link:definition>1001002 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.brandywinerealty.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1002003 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofOperations" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofOperations">
        <link:definition>1003004 - Statement - Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofComprehensiveIncome" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofComprehensiveIncome">
        <link:definition>1004005 - Statement - Consolidated Statements of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofBeneficiariesEquity" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofBeneficiariesEquity">
        <link:definition>1005006 - Statement - Consolidated Statements of Beneficiaries' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofBeneficiariesEquityParenthetical" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofBeneficiariesEquityParenthetical">
        <link:definition>1006007 - Statement - Consolidated Statements of Beneficiaries' Equity (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofPartnersEquity" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofPartnersEquity">
        <link:definition>1007008 - Statement - Consolidated Statements of Partners' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofPartnersEquityParenthetical" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofPartnersEquityParenthetical">
        <link:definition>1008009 - Statement - Consolidated Statements of Partners' Equity (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofCashFlows" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofCashFlows">
        <link:definition>1009010 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofCashFlowsParenthetical" roleURI="http://www.brandywinerealty.com/role/ConsolidatedStatementsofCashFlowsParenthetical">
        <link:definition>1010011 - Statement - Consolidated Statements of Cash Flows (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationoftheParentCompanyandTheOperatingPartnership" roleURI="http://www.brandywinerealty.com/role/OrganizationoftheParentCompanyandTheOperatingPartnership">
        <link:definition>2101101 - Disclosure - Organization of the Parent Company and The Operating Partnership</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationoftheParentCompanyandTheOperatingPartnershipTables" roleURI="http://www.brandywinerealty.com/role/OrganizationoftheParentCompanyandTheOperatingPartnershipTables">
        <link:definition>2302301 - Disclosure - Organization of the Parent Company and The Operating Partnership (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationofTheParentCompanyandTheOperatingPartnershipNarrativeDetails" roleURI="http://www.brandywinerealty.com/role/OrganizationofTheParentCompanyandTheOperatingPartnershipNarrativeDetails">
        <link:definition>2403401 - Disclosure - Organization of The Parent Company and The Operating Partnership - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="OrganizationofTheParentCompanyandTheOperatingPartnershipSummaryofCorePortfolioofOperatingPropertiesandExcludesDevelopmentRedevelopmentandHeldforSaleDetails" roleURI="http://www.brandywinerealty.com/role/OrganizationofTheParentCompanyandTheOperatingPartnershipSummaryofCorePortfolioofOperatingPropertiesandExcludesDevelopmentRedevelopmentandHeldforSaleDetails">
        <link:definition>2404402 - Disclosure - Organization of The Parent Company and The Operating Partnership - Summary of Core Portfolio of Operating Properties and Excludes Development, Redevelopment and Held for Sale (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentation" roleURI="http://www.brandywinerealty.com/role/BasisofPresentation">
        <link:definition>2105102 - Disclosure - Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BasisofPresentationPolicies" roleURI="http://www.brandywinerealty.com/role/BasisofPresentationPolicies">
        <link:definition>2206201 - Disclosure - Basis of Presentation (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateInvestments" roleURI="http://www.brandywinerealty.com/role/RealEstateInvestments">
        <link:definition>2107103 - Disclosure - Real Estate Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateInvestmentsTables" roleURI="http://www.brandywinerealty.com/role/RealEstateInvestmentsTables">
        <link:definition>2308302 - Disclosure - Real Estate Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateInvestmentsGrossCarryingValueofOperatingPropertiesDetails" roleURI="http://www.brandywinerealty.com/role/RealEstateInvestmentsGrossCarryingValueofOperatingPropertiesDetails">
        <link:definition>2409403 - Disclosure - Real Estate Investments - Gross Carrying Value of Operating Properties (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RealEstateInvestmentsTextualDetails" roleURI="http://www.brandywinerealty.com/role/RealEstateInvestmentsTextualDetails">
        <link:definition>2410404 - Disclosure - Real Estate Investments - Textual (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinUnconsolidatedRealEstateVentures" roleURI="http://www.brandywinerealty.com/role/InvestmentinUnconsolidatedRealEstateVentures">
        <link:definition>2111104 - Disclosure - Investment in Unconsolidated Real Estate Ventures</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinUnconsolidatedRealEstateVenturesTables" roleURI="http://www.brandywinerealty.com/role/InvestmentinUnconsolidatedRealEstateVenturesTables">
        <link:definition>2312303 - Disclosure - Investment in Unconsolidated Real Estate Ventures (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinUnconsolidatedRealEstateVenturesTextualDetails" roleURI="http://www.brandywinerealty.com/role/InvestmentinUnconsolidatedRealEstateVenturesTextualDetails">
        <link:definition>2413405 - Disclosure - Investment in Unconsolidated Real Estate Ventures - Textual (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinUnconsolidatedRealEstateVenturesSummaryofFinancialPositionofRealEstateVenturesDetails" roleURI="http://www.brandywinerealty.com/role/InvestmentinUnconsolidatedRealEstateVenturesSummaryofFinancialPositionofRealEstateVenturesDetails">
        <link:definition>2414406 - Disclosure - Investment in Unconsolidated Real Estate Ventures - Summary of Financial Position of Real Estate Ventures (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InvestmentinUnconsolidatedRealEstateVenturesSummaryofResultsofOperationsofRealEstateVentureswithInterestsDetails" roleURI="http://www.brandywinerealty.com/role/InvestmentinUnconsolidatedRealEstateVenturesSummaryofResultsofOperationsofRealEstateVentureswithInterestsDetails">
        <link:definition>2415407 - Disclosure - Investment in Unconsolidated Real Estate Ventures - Summary of Results of Operations of Real Estate Ventures with Interests (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtandPreferredEquityInvestments" roleURI="http://www.brandywinerealty.com/role/DebtandPreferredEquityInvestments">
        <link:definition>2116105 - Disclosure - Debt and Preferred Equity Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtandPreferredEquityInvestmentsDetails" roleURI="http://www.brandywinerealty.com/role/DebtandPreferredEquityInvestmentsDetails">
        <link:definition>2417408 - Disclosure - Debt and Preferred Equity Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://www.brandywinerealty.com/role/Leases">
        <link:definition>2118106 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.brandywinerealty.com/role/LeasesTables">
        <link:definition>2319304 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesDetails" roleURI="http://www.brandywinerealty.com/role/LeasesDetails">
        <link:definition>2420409 - Disclosure - Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangibleAssetsandLiabilities" roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsandLiabilities">
        <link:definition>2121107 - Disclosure - Intangible Assets and Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangibleAssetsandLiabilitiesTables" roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsandLiabilitiesTables">
        <link:definition>2322305 - Disclosure - Intangible Assets and Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangibleAssetsandLiabilitiesIntangibleAssetsandLiabilitiesDetails" roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsandLiabilitiesIntangibleAssetsandLiabilitiesDetails">
        <link:definition>2423410 - Disclosure - Intangible Assets and Liabilities - Intangible Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IntangibleAssetsandLiabilitiesAnnualAmortizationofIntangibleAssetsLiabilitiesDetails" roleURI="http://www.brandywinerealty.com/role/IntangibleAssetsandLiabilitiesAnnualAmortizationofIntangibleAssetsLiabilitiesDetails">
        <link:definition>2424411 - Disclosure - Intangible Assets and Liabilities - Annual Amortization of Intangible Assets, Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtObligations" roleURI="http://www.brandywinerealty.com/role/DebtObligations">
        <link:definition>2125108 - Disclosure - Debt Obligations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtObligationsTables" roleURI="http://www.brandywinerealty.com/role/DebtObligationsTables">
        <link:definition>2326306 - Disclosure - Debt Obligations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtObligationsConsolidatedDebtObligationsOutstandingDetails" roleURI="http://www.brandywinerealty.com/role/DebtObligationsConsolidatedDebtObligationsOutstandingDetails">
        <link:definition>2427412 - Disclosure - Debt Obligations - Consolidated Debt Obligations Outstanding (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtObligationsTextualDetails" roleURI="http://www.brandywinerealty.com/role/DebtObligationsTextualDetails">
        <link:definition>2428413 - Disclosure - Debt Obligations - Textual (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtObligationsAggregateScheduledPrincipalPaymentsofDebtObligationExcludingAmortizationofDiscountsandPremiumsDetails" roleURI="http://www.brandywinerealty.com/role/DebtObligationsAggregateScheduledPrincipalPaymentsofDebtObligationExcludingAmortizationofDiscountsandPremiumsDetails">
        <link:definition>2429414 - Disclosure - Debt Obligations - Aggregate Scheduled Principal Payments of Debt Obligation, Excluding Amortization of Discounts and Premiums (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstruments" roleURI="http://www.brandywinerealty.com/role/FairValueofFinancialInstruments">
        <link:definition>2130109 - Disclosure - Fair Value of Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsTables" roleURI="http://www.brandywinerealty.com/role/FairValueofFinancialInstrumentsTables">
        <link:definition>2331307 - Disclosure - Fair Value of Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueofFinancialInstrumentsFinancialInstrumentsforwhichEstimatesofFairValueDifferfromCarryingAmountsDetails" roleURI="http://www.brandywinerealty.com/role/FairValueofFinancialInstrumentsFinancialInstrumentsforwhichEstimatesofFairValueDifferfromCarryingAmountsDetails">
        <link:definition>2432415 - Disclosure - Fair Value of Financial Instruments - Financial Instruments for which Estimates of Fair Value Differ from Carrying Amounts (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstruments" roleURI="http://www.brandywinerealty.com/role/DerivativeFinancialInstruments">
        <link:definition>2133110 - Disclosure - Derivative Financial Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsTables" roleURI="http://www.brandywinerealty.com/role/DerivativeFinancialInstrumentsTables">
        <link:definition>2334308 - Disclosure - Derivative Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeFinancialInstrumentsDetails" roleURI="http://www.brandywinerealty.com/role/DerivativeFinancialInstrumentsDetails">
        <link:definition>2435416 - Disclosure - Derivative Financial Instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LimitedPartnersNonControllingInterestsintheParentCompany" roleURI="http://www.brandywinerealty.com/role/LimitedPartnersNonControllingInterestsintheParentCompany">
        <link:definition>2136111 - Disclosure - Limited Partners' Non-Controlling Interests in the Parent Company</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LimitedPartnersNonControllingInterestsintheParentCompanyDetails" roleURI="http://www.brandywinerealty.com/role/LimitedPartnersNonControllingInterestsintheParentCompanyDetails">
        <link:definition>2437417 - Disclosure - Limited Partners' Non-Controlling Interests in the Parent Company (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BeneficiariesEquityoftheParentCompany" roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityoftheParentCompany">
        <link:definition>2138112 - Disclosure - Beneficiaries Equity of the Parent Company</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BeneficiariesEquityoftheParentCompanyTables" roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityoftheParentCompanyTables">
        <link:definition>2339309 - Disclosure - Beneficiaries Equity of the Parent Company (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BeneficiariesEquityoftheParentCompanyNumberofSharesandNetIncomeUsedtoCalculateBasicandDilutedEarningsperShareDetails" roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityoftheParentCompanyNumberofSharesandNetIncomeUsedtoCalculateBasicandDilutedEarningsperShareDetails">
        <link:definition>2440418 - Disclosure - Beneficiaries Equity of the Parent Company - Number of Shares and Net Income Used to Calculate Basic and Diluted Earnings per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BeneficiariesEquityoftheParentCompanyTextualDetails" roleURI="http://www.brandywinerealty.com/role/BeneficiariesEquityoftheParentCompanyTextualDetails">
        <link:definition>2441419 - Disclosure - Beneficiaries Equity of the Parent Company - Textual (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PartnersEquityOfTheParentCompany" roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfTheParentCompany">
        <link:definition>2142113 - Disclosure - Partners' Equity Of The Parent Company</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PartnersEquityOfTheParentCompanyTables" roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfTheParentCompanyTables">
        <link:definition>2343310 - Disclosure - Partners' Equity Of The Parent Company (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PartnersEquityOfTheParentCompanyNumberofUnitsandNetIncomeUsedtoCalculateBasicandDilutedEarningsPerCommonPartnershipUnitDetails" roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfTheParentCompanyNumberofUnitsandNetIncomeUsedtoCalculateBasicandDilutedEarningsPerCommonPartnershipUnitDetails">
        <link:definition>2444420 - Disclosure - Partners' Equity Of The Parent Company - Number of Units and Net Income Used to Calculate Basic and Diluted Earnings Per Common Partnership Unit (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PartnersEquityOfTheParentCompanyTextualDetails" roleURI="http://www.brandywinerealty.com/role/PartnersEquityOfTheParentCompanyTextualDetails">
        <link:definition>2445421 - Disclosure - Partners' Equity Of The Parent Company - Textual (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensation" roleURI="http://www.brandywinerealty.com/role/ShareBasedCompensation">
        <link:definition>2146114 - Disclosure - Share Based Compensation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationTables" roleURI="http://www.brandywinerealty.com/role/ShareBasedCompensationTables">
        <link:definition>2347311 - Disclosure - Share Based Compensation (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationNarrativeDetails" roleURI="http://www.brandywinerealty.com/role/ShareBasedCompensationNarrativeDetails">
        <link:definition>2448422 - Disclosure - Share Based Compensation - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationRestrictedShareActivityDetails" roleURI="http://www.brandywinerealty.com/role/ShareBasedCompensationRestrictedShareActivityDetails">
        <link:definition>2449423 - Disclosure - Share Based Compensation - Restricted Share Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedCompensationRestrictedPerformanceShareUnitsDetails" roleURI="http://www.brandywinerealty.com/role/ShareBasedCompensationRestrictedPerformanceShareUnitsDetails">
        <link:definition>2450424 - Disclosure - Share Based Compensation - Restricted Performance Share Units (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.brandywinerealty.com/role/SegmentInformation">
        <link:definition>2151115 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.brandywinerealty.com/role/SegmentInformationTables">
        <link:definition>2352312 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTextualDetails" roleURI="http://www.brandywinerealty.com/role/SegmentInformationTextualDetails">
        <link:definition>2453425 - Disclosure - Segment Information (Textual) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationRealEstateInvestmentsatCostofCompanysReportableSegmentsDetails" roleURI="http://www.brandywinerealty.com/role/SegmentInformationRealEstateInvestmentsatCostofCompanysReportableSegmentsDetails">
        <link:definition>2454426 - Disclosure - Segment Information - Real Estate Investments, at Cost of Company's Reportable Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationNetOperatingIncomeofCompanysReportableSegmentsDetails" roleURI="http://www.brandywinerealty.com/role/SegmentInformationNetOperatingIncomeofCompanysReportableSegmentsDetails">
        <link:definition>2455427 - Disclosure - Segment Information - Net Operating Income of Company's Reportable Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationUnconsolidatedRealEstateVenturesofCompanysReportableSegmentsDetails" roleURI="http://www.brandywinerealty.com/role/SegmentInformationUnconsolidatedRealEstateVenturesofCompanysReportableSegmentsDetails">
        <link:definition>2456428 - Disclosure - Segment Information - Unconsolidated Real Estate Ventures of Company's Reportable Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationReconciliationofConsolidatedNetIncometoConsolidatedNOIDetails" roleURI="http://www.brandywinerealty.com/role/SegmentInformationReconciliationofConsolidatedNetIncometoConsolidatedNOIDetails">
        <link:definition>2457429 - Disclosure - Segment Information - Reconciliation of Consolidated Net Income to Consolidated NOI (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.brandywinerealty.com/role/CommitmentsandContingencies">
        <link:definition>2158116 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesDetails" roleURI="http://www.brandywinerealty.com/role/CommitmentsandContingenciesDetails">
        <link:definition>2459430 - Disclosure - Commitments and Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="bdn_PaymentOfOrdinaryDividendsCommonStockAndPreferredStock" abstract="false" name="PaymentOfOrdinaryDividendsCommonStockAndPreferredStock" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ConsolidatedDebtObligationsAbstract" abstract="true" name="ConsolidatedDebtObligationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bdn_RentsMember" abstract="true" name="RentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A600MillionUnsecuredCreditFacilityMember" abstract="true" name="A600MillionUnsecuredCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_CapitalCommitmentTargetsConstructionLoanAmount" abstract="false" name="CapitalCommitmentTargetsConstructionLoanAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_MixedUsePropertiesMember" abstract="true" name="MixedUsePropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A4040WilsonVentureMember" abstract="true" name="A4040WilsonVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_Note2027Member" abstract="true" name="Note2027Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_AccumulatedServicePeriodForVoluntaryTermination" abstract="false" name="AccumulatedServicePeriodForVoluntaryTermination" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bdn_AustinPreferredEquityInvestmentMember" abstract="true" name="AustinPreferredEquityInvestmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_IntangibleAssetsAndLiabilitiesDisclosureTextBlock" abstract="false" name="IntangibleAssetsAndLiabilitiesDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="bdn_LandHeldUnderAvailableForSale" abstract="false" name="LandHeldUnderAvailableForSale" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="bdn_March52021GrantMember" abstract="true" name="March52021GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_PhiladelphiaCBDMember" abstract="true" name="PhiladelphiaCBDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ShareBasedPaymentArrangementExpenseRecognizedToDate" abstract="false" name="ShareBasedPaymentArrangementExpenseRecognizedToDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ResidentialTowerMember" abstract="true" name="ResidentialTowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A3025JFKBoulevardMember" abstract="true" name="A3025JFKBoulevardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_OneandTwoCommerceSquareMember" abstract="true" name="OneandTwoCommerceSquareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_NumberOfParcelsOfLand" abstract="false" name="NumberOfParcelsOfLand" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bdn_NetIncomeLossAvailableToCommonUnitholdersBasic" abstract="false" name="NetIncomeLossAvailableToCommonUnitholdersBasic" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_LeaseCommissionIncomeMember" abstract="true" name="LeaseCommissionIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_BrandywineNineteenNineteenVenturesMember" abstract="true" name="BrandywineNineteenNineteenVenturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ScheduleOfCorePortfolioOfOperatingPropertiesAndExcludesDevelopmentAndRedevelopmentPropertiesUnderConstructionTableTableTextBlock" abstract="false" name="ScheduleOfCorePortfolioOfOperatingPropertiesAndExcludesDevelopmentAndRedevelopmentPropertiesUnderConstructionTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="bdn_LandParcelOneMember" abstract="true" name="LandParcelOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_BrandywineOperatingPartnershipLPMember" abstract="true" name="BrandywineOperatingPartnershipLPMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_InvestmentMandatoryRedemptionTerm" abstract="false" name="InvestmentMandatoryRedemptionTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bdn_NonOfficerEmployeesMember" abstract="true" name="NonOfficerEmployeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_LongTermDebtMaturitiesRepaymentsOfPrincipal" abstract="false" name="LongTermDebtMaturitiesRepaymentsOfPrincipal" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_IndentureIbPreferredTrustIMember" abstract="true" name="IndentureIbPreferredTrustIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_FiniteLivedIntangibleAssetsAndLiabilitiesAmortizationExpenseTableTableTextBlock" abstract="false" name="FiniteLivedIntangibleAssetsAndLiabilitiesAmortizationExpenseTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="bdn_EquityMethodInvestmentSummarizedFinancialInformationDebt" abstract="false" name="EquityMethodInvestmentSummarizedFinancialInformationDebt" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_LongTermDebtMaturityAfterYearFour" abstract="false" name="LongTermDebtMaturityAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ThirdPartyManagementRevenueMember" abstract="true" name="ThirdPartyManagementRevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_NumberOfUnconsolidatedInvestmentsInRealEstateVentures" abstract="false" name="NumberOfUnconsolidatedInvestmentsInRealEstateVentures" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bdn_PartnersCapitalAccountRepurchasedAndRetired" abstract="false" name="PartnersCapitalAccountRepurchasedAndRetired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_NoncashOrPartNoncashDispositionOfInvestingRealEstate" abstract="false" name="NoncashOrPartNoncashDispositionOfInvestingRealEstate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_StraightLineGroundRentExpense" abstract="false" name="StraightLineGroundRentExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ManagementFeesMember" abstract="true" name="ManagementFeesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_OtherLandMember" abstract="true" name="OtherLandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ContractualObligationAmountCommittedToDate" abstract="false" name="ContractualObligationAmountCommittedToDate" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_LeasholdInterestLandMember" abstract="true" name="LeasholdInterestLandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_SevenYearTermLoanMember" abstract="true" name="SevenYearTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_VariableRateDebtMember" abstract="true" name="VariableRateDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A2868InterestRateSwapMaturingOctober82022Member" abstract="true" name="A2868InterestRateSwapMaturingOctober82022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ShareIssuanceFromToDeferredCompensationPlanShares" abstract="false" name="ShareIssuanceFromToDeferredCompensationPlanShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bdn_AustinTexasMember" abstract="true" name="AustinTexasMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_CorePropertiesMember" abstract="true" name="CorePropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_PaymentsOnAccountOfEmployeeTaxWithholdingsOnShareBasedAwards" abstract="false" name="PaymentsOnAccountOfEmployeeTaxWithholdingsOnShareBasedAwards" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ChangeInCapitalExpendituresFinancedThroughAccountsPayable" abstract="false" name="ChangeInCapitalExpendituresFinancedThroughAccountsPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_RestrictedPerformanceShareUnitsPlanMember" abstract="true" name="RestrictedPerformanceShareUnitsPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ShareIssuanceFromToDeferredCompensationPlan" abstract="false" name="ShareIssuanceFromToDeferredCompensationPlan" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_AreaOfLandHeldForDevelopment" abstract="false" name="AreaOfLandHeldForDevelopment" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="bdn_ProceedsFromStockOptionsExercisedNet" abstract="false" name="ProceedsFromStockOptionsExercisedNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_LandHeldForDevelopmentMember" abstract="true" name="LandHeldForDevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ThresholdAgeForQualifyingRetirement" abstract="false" name="ThresholdAgeForQualifyingRetirement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bdn_A2019AwardsMember" abstract="true" name="A2019AwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_RedeemableCommonLimitedPartnershipUnitsMember" abstract="true" name="RedeemableCommonLimitedPartnershipUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_EstimatedProjectCost" abstract="false" name="EstimatedProjectCost" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_LandUnderActiveDevelopmentMember" abstract="true" name="LandUnderActiveDevelopmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_IndentureIaPreferredTrustIMember" abstract="true" name="IndentureIaPreferredTrustIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_AllowanceForDoubtfulAccruedRentReceivable" abstract="false" name="AllowanceForDoubtfulAccruedRentReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_PaymentsToRedevelopRealEstate" abstract="false" name="PaymentsToRedevelopRealEstate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_GainLossOnSaleOfPropertiesAbstract" abstract="true" name="GainLossOnSaleOfPropertiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bdn_FiniteLivedIntangibleAssetExpectedAmortizationafterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationafterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_March52020GrantMember" abstract="true" name="March52020GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_JointVentureAdditionalFundingCommitted" abstract="false" name="JointVentureAdditionalFundingCommitted" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_NumberOfInvestments" abstract="false" name="NumberOfInvestments" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bdn_PennsylvaniaSuburbsMember" abstract="true" name="PennsylvaniaSuburbsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ShareBasedCompensationArrangementNumberOfVestingInstallments" abstract="false" name="ShareBasedCompensationArrangementNumberOfVestingInstallments" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bdn_MidAtlanticOfficeJointVentureMember" abstract="true" name="MidAtlanticOfficeJointVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_JointVentureAdditionalFundingCommittedByOtherParty" abstract="false" name="JointVentureAdditionalFundingCommittedByOtherParty" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_MinorityInterestInOperatingPartnershipsSettlementValue" abstract="false" name="MinorityInterestInOperatingPartnershipsSettlementValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_RealEstateInvestmentPropertyHeldForUseandSale" abstract="false" name="RealEstateInvestmentPropertyHeldForUseandSale" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_VestingAccelerationPeriod" abstract="false" name="VestingAccelerationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bdn_BasisAdjustmentsAndOther" abstract="false" name="BasisAdjustmentsAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_UnusualOrInfrequentItemOrBothRestorationLiability" abstract="false" name="UnusualOrInfrequentItemOrBothRestorationLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardsIssuableUnderOutperformanceFeature" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAwardsIssuableUnderOutperformanceFeature" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bdn_ShareBasedCompensationArrangementOutperformanceFeatureMeasurementTerm" abstract="false" name="ShareBasedCompensationArrangementOutperformanceFeatureMeasurementTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bdn_PartnersCapitalAccountUnitsRepurchasedAndRetired" abstract="false" name="PartnersCapitalAccountUnitsRepurchasedAndRetired" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bdn_NoncashOrPartNoncashDeconsolidationOperatingRealEstate" abstract="false" name="NoncashOrPartNoncashDeconsolidationOperatingRealEstate" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_MAPVentureMember" abstract="true" name="MAPVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_UnconsolidatedRealEstateVenturesMember" abstract="true" name="UnconsolidatedRealEstateVenturesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A2021AwardsMember" abstract="true" name="A2021AwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_PotentialDevelopmentCapacity" abstract="false" name="PotentialDevelopmentCapacity" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="bdn_NumberOfRestrictedShareRightWillGetSettledForNumberOfCommonShare" abstract="false" name="NumberOfRestrictedShareRightWillGetSettledForNumberOfCommonShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bdn_PreferredEquityInvestmentMember" abstract="true" name="PreferredEquityInvestmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_IncomeLossFromRealEstateVenturesNetOfDistributions" abstract="false" name="IncomeLossFromRealEstateVenturesNetOfDistributions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_NetIncomeLossAttributableToNoncontrollingInterestDiluted" abstract="false" name="NetIncomeLossAttributableToNoncontrollingInterestDiluted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_RealEstateVentureMember" abstract="true" name="RealEstateVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_NumberOfRealEstatePropertiesWithNegativeInvestmentBalances" abstract="false" name="NumberOfRealEstatePropertiesWithNegativeInvestmentBalances" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bdn_EquityMethodInvestmentSummarizedFinancialInformationDebtNet" abstract="false" name="EquityMethodInvestmentSummarizedFinancialInformationDebtNet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_RealEstateInvestmentOwnershipInterestHeldByPartner" abstract="false" name="RealEstateInvestmentOwnershipInterestHeldByPartner" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="bdn_EstimatedPotentialAdditionalContributionObligation" abstract="false" name="EstimatedPotentialAdditionalContributionObligation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_InvestmentInDebtAndPreferredEquitySecuritiesTextBlock" abstract="false" name="InvestmentInDebtAndPreferredEquitySecuritiesTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="bdn_Note2029Member" abstract="true" name="Note2029Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_AreaOfBuildingToBeConstructed" abstract="false" name="AreaOfBuildingToBeConstructed" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="bdn_ScheduleOfFiniteLivedIntangibleAssetsAndLiabilitiesTableTableTextBlock" abstract="false" name="ScheduleOfFiniteLivedIntangibleAssetsAndLiabilitiesTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="bdn_NetIncomeLossAvailableToCommonUnitHoldersDiluted" abstract="false" name="NetIncomeLossAvailableToCommonUnitHoldersDiluted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ManagementCompanySubsidiariesMember" abstract="true" name="ManagementCompanySubsidiariesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_February212019GrantMember" abstract="true" name="February212019GrantMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_PreferredEquityInvestmentObligationMember" abstract="true" name="PreferredEquityInvestmentObligationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_Note2024Member" abstract="true" name="Note2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_AreaOfAdditionalUndevelopedParcelsOfLandWithOptionToPurchase" abstract="false" name="AreaOfAdditionalUndevelopedParcelsOfLandWithOptionToPurchase" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:areaItemType"/>
  <xs:element id="bdn_StraightLineRentExcludingRentTerminationFee" abstract="false" name="StraightLineRentExcludingRentTerminationFee" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_RepurchaseProgramNumberOfMirrorUnitOfOperatingPartnershipRetiredForEachCommonShareRepurchased" abstract="false" name="RepurchaseProgramNumberOfMirrorUnitOfOperatingPartnershipRetiredForEachCommonShareRepurchased" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="bdn_CommonSharesInGrantorTrustIssuedAndOutstanding" abstract="false" name="CommonSharesInGrantorTrustIssuedAndOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="bdn_AnnualPreferredReturnOnInvestedCapital" abstract="false" name="AnnualPreferredReturnOnInvestedCapital" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="bdn_DevelopmentProjectsMember" abstract="true" name="DevelopmentProjectsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_BelowMarketLeaseAmortizationIncomeAfterYearFour" abstract="false" name="BelowMarketLeaseAmortizationIncomeAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_OrganizationOfParentCompanyAndOperatingPartnershipTable" abstract="true" name="OrganizationOfParentCompanyAndOperatingPartnershipTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bdn_CommonStockHeldInTrustMember" abstract="true" name="CommonStockHeldInTrustMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_NetGainLossOnSaleOfUndepreciatedRealEstate" abstract="false" name="NetGainLossOnSaleOfUndepreciatedRealEstate" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_EarningsPerCommonPartnershipUnitTable" abstract="true" name="EarningsPerCommonPartnershipUnitTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="bdn_DrexelSquareMember" abstract="true" name="DrexelSquareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_SharebasedCompensationArrangementbySharebasedPaymentAwardAwardIssuancePercentage" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardAwardIssuancePercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="bdn_NotesReceivableInterestRate" abstract="false" name="NotesReceivableInterestRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="bdn_AdjustmentIncreaseDecreaseOfRedeemablePartnershipUnitsToLiquidationValueAtPeriodEnd" abstract="false" name="AdjustmentIncreaseDecreaseOfRedeemablePartnershipUnitsToLiquidationValueAtPeriodEnd" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_ThirdPartyManagementExpenses" abstract="false" name="ThirdPartyManagementExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_IncomeLossfromEquityMethodInvestmentsBeforeBasisAdjustmentsAndOther" abstract="false" name="IncomeLossfromEquityMethodInvestmentsBeforeBasisAdjustmentsAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_DeferredCompensationPayableInCommonStock" abstract="false" name="DeferredCompensationPayableInCommonStock" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_EarningsPerCommonPartnershipUnitLineItems" abstract="true" name="EarningsPerCommonPartnershipUnitLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bdn_MixedUseTowerMember" abstract="true" name="MixedUseTowerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_IndentureIiPreferredTrustIiMember" abstract="true" name="IndentureIiPreferredTrustIiMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A2020AwardsMember" abstract="true" name="A2020AwardsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_MetropolitanDCMember" abstract="true" name="MetropolitanDCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_OfficePropertiesMember" abstract="true" name="OfficePropertiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_RedevelopmentProjectsMember" abstract="true" name="RedevelopmentProjectsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_BeneficiariesEquityTextBlock" abstract="false" name="BeneficiariesEquityTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="bdn_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodAfterPerformancePeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodAfterPerformancePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bdn_ReconciliationOfCashCashEquivalentsAndRestrictedCashAbstract" abstract="true" name="ReconciliationOfCashCashEquivalentsAndRestrictedCashAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bdn_LandParcelTwoMember" abstract="true" name="LandParcelTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_A3300InterestRateSwapMaturingJanuary302021Member" abstract="true" name="A3300InterestRateSwapMaturingJanuary302021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_IncreaseDecreaseInOtherAssetsFromDeconsolidation" abstract="false" name="IncreaseDecreaseInOtherAssetsFromDeconsolidation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_OrganizationOfParentCompanyAndOperatingPartnershipLineItems" abstract="true" name="OrganizationOfParentCompanyAndOperatingPartnershipLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="bdn_LeaseAgreementTerm" abstract="false" name="LeaseAgreementTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="bdn_NumberOfPropertiesDamaged" abstract="false" name="NumberOfPropertiesDamaged" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="bdn_AdvancesToTenantForPurchaseOfTenantAssetsNetOfRepayments" abstract="false" name="AdvancesToTenantForPurchaseOfTenantAssetsNetOfRepayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_OperatingRealEstateInvestmentPropertyNet" abstract="false" name="OperatingRealEstateInvestmentPropertyNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="bdn_Note2023Member" abstract="true" name="Note2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="bdn_ChangeInCapitalExpendituresFinancedThroughRetentionPayableAtPeriodEnd" abstract="false" name="ChangeInCapitalExpendituresFinancedThroughRetentionPayableAtPeriodEnd" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
