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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | $ 28,241,879 | $ 27,870,623
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 372,470 | 372,922
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 325,841 | 334,767
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (8,040,311) | (7,528,057)
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 1,478,206 | 1,254,882
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 79,060 | 80,314
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 92,625 | 107,453
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 1,538,515 | 1,466,220
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 847,690 | 813,345
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 108,105 | 70,839
Assets held for sale | 24,770 | 0
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 4,280,067 | 4,276,609
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 360,039 | 370,885
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 389,213 | 392,686
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 480,017 | 401,874
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | $ 386,074 | $ 450,796
Reedemable deferred stock units, units | 111,701 | 128,227
Limited Partners' Capital Account, Units Outstanding (in units) | 156,780,294 |
General Partners' Capital Account, Units Outstanding (in units) | 1,768,004 |
Excess stock, par value | $ 0.01 | $ 0.01
Excess stock, shares authorized | 150,000,000 | 150,000,000
Excess stock, shares outstanding | 0 | 0
Excess stock, shares issued | 0 | 0
Preferred stock, par value | $ 0.01 | $ 0.01
Preferred stock, shares authorized | 50,000,000 | 50,000,000
Preferred stock / units, shares / units issued (in shares / units) | 0 | 0
Preferred stock / units, shares / units outstanding (in shares / units) | 0 | 0
Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01
Common stock, shares authorized | 250,000,000 | 250,000,000
Common stock, shares issued | 158,627,198 | 158,253,895
Common Stock, Shares, Outstanding | 158,548,298 | 158,174,995
Treasury common stock at cost, shares | 78,900 | 78,900
Related Party |  |
Related party note receivable, net | $ 28,346 | $ 88,779
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 800 | 700
Nonrelated Party |  |
Related party note receivable, net | 9,373 | 4,947
Boston Properties Limited Partnership |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | 27,884,397 | 27,504,358
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 372,470 | 372,922
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 325,841 | 334,767
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (7,906,629) | (7,397,882)
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 1,478,206 | 1,254,882
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 79,060 | 80,314
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 92,625 | 107,453
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 1,538,515 | 1,466,220
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 847,690 | 813,345
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 108,105 | 70,839
Assets held for sale | 24,770 | 0
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 4,280,067 | 4,276,609
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 360,039 | 370,885
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 389,213 | 392,686
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 480,017 | 401,874
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | $ 386,074 | $ 450,796
Reedemable deferred stock units, units | 111,701 | 128,227
Limited Partners' Capital Account, Units Outstanding (in units) | 156,780,294 | 156,412,584
General Partners' Capital Account, Units Outstanding (in units) | 1,768,004 | 1,762,411
NonControlling Interest Redeemable Partnership Units Common Units Shares Outstanding | 15,590,009 | 15,730,882
NonControlling Interest Redeemable Partnership Units Common Units Long Term Incentive Units At Redemption Value Shares Outstanding | 2,662,140 | 2,335,229
Boston Properties Limited Partnership | Related Party |  |
Related party note receivable, net | $ 28,346 | $ 88,779
Boston Properties Limited Partnership | Nonrelated Party |  |
Related party note receivable, net | 9,373 | 4,947
Variable Interest Entity, Primary Beneficiary [Member] |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | 8,005,124 | 7,797,430
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 21,000 | 21,000
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 0 | 140,558
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (1,763,988) | (1,628,274)
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 255,631 | 373,737
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 10,319 | 4,979
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 30,989 | 20,435
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 470,734 | 435,110
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 204,924 | 211,726
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 14,509 | 15,036
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 3,286,870 | 3,282,027
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 21,074 | 20,931
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 0 | 157,691
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 88,849 | 115,808
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | 95,209 | 126,202
Variable Interest Entity, Primary Beneficiary [Member] | Boston Properties Limited Partnership |  |
Real estate, at cost (amounts related to variable interest entities (“VIEs”) of $8,005,124 and $7,797,430 at December 31, 2025 and December 31, 2024, respectively) | 8,005,124 | 7,797,430
Right of use assets - finance leases (amounts related to VIEs of $21,000 and $21,000 at December 31, 2025 and December 31, 2024, respectively) | 21,000 | 21,000
Right of use assets - operating leases (amounts related to VIEs of $0 and $140,558 at December 31, 2025 and December 31, 2024, respectively) | 0 | 140,558
Less: accumulated depreciation (amounts related to VIEs of $(1,763,988) and $(1,628,274) at December 31, 2025 and December 31, 2024, respectively) | (1,763,988) | (1,628,274)
Cash and cash equivalents (amounts related to VIEs of $255,631 and $373,737 at December 31, 2025 and December 31, 2024, respectively) | 255,631 | 373,737
Cash held in escrows (amounts related to VIEs of $10,319 and $4,979 at December 31, 2025 and December 31, 2024, respectively) | 10,319 | 4,979
Tenant and other receivables, net (amounts related to VIEs of $30,989 and $20,435 at December 31, 2025 and December 31, 2024, respectively) | 30,989 | 20,435
Accrued rental income, net (amounts related to VIEs of $470,734 and $435,110 at December 31, 2025 and December 31, 2024, respectively) | 470,734 | 435,110
Deferred charges, net (amounts related to VIEs of $204,924 and $211,726 at December 31, 2025 and December 31, 2024, respectively) | 204,924 | 211,726
Prepaid expenses and other assets (amounts related to VIEs of $14,509 and $15,036 at December 31, 2025 and December 31, 2024, respectively) | 14,509 | 15,036
Mortgage notes payable, net (amounts related to VIEs of $3,286,870 and $3,282,027 at December 31, 2025 and December 31, 2024, respectively) | 3,286,870 | 3,282,027
Lease liabilities - finance leases (amounts related to VIEs of $21,074 and $20,931 at December 31, 2025 and December 31, 2024, respectively) | 21,074 | 20,931
Lease liabilities - operating leases (amounts related to VIEs of $0 and $157,691 at December 31, 2025 and December 31, 2024, respectively) | 0 | 157,691
Accounts payable and accrued expenses (amounts related to VIEs of $88,849 and $115,808 at December 31, 2025 and December 31, 2024, respectively) | 88,849 | 115,808
Other liabilities (amounts related to VIEs of $95,209 and $126,202 at December 31, 2025 and December 31, 2024, respectively) | $ 95,209 | $ 126,202

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