| SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Text Block] | Item 15. Exhibits and Financial Statement Schedules. (a) Financial Statement Schedule Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Land and Improvements Building and Land Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Land Building 767 Fifth Avenue (the General Motors Building) Office New York, NY $ 2,281,016 $ 1,796,252 $ 1,532,654 $ 260,700 $ 1,796,252 $ 1,793,354 $ — $ — $ 3,589,606 $ 407,377 1968/2019 2013 (1) Prudential Center Office Boston, MA — 92,077 948,357 615,973 115,637 1,483,065 192 57,513 1,656,407 678,000 1965/1993/2002/2016-2017 1998/1999/2000 (1) Embarcadero Center Office San Francisco, CA — 179,697 847,410 480,465 195,987 1,311,585 — — 1,507,572 692,283 1970/1989 1998-1999 (1) 399 Park Avenue Office New York, NY — 339,200 700,358 366,449 354,107 1,051,900 — — 1,406,007 405,104 1961/2018 2002 (1) 601 Lexington Avenue Office New York, NY 986,898 241,600 494,782 486,028 289,639 932,771 — — 1,222,410 325,012 1977/1997/2021 2001 (1) Salesforce Tower Office San Francisco, CA — 200,349 946,205 7,515 200,349 953,720 — — 1,154,069 99,152 2018 2013 (1) 200 Clarendon Street and Garage Office Boston, MA — 219,543 667,884 222,640 250,560 859,507 — — 1,110,067 277,388 1976 2010 (1) 250 West 55th Street Office New York, NY — 285,263 603,167 52,298 285,263 655,465 — — 940,728 159,238 2014 2007 (1) 100 Federal Street Office Boston, MA — 131,067 435,954 138,727 131,067 574,681 — — 705,748 157,939 1971-1975/2017 2012 (1) Times Square Tower Office New York, NY — 165,413 380,438 115,843 169,193 492,501 — — 661,694 232,128 2004 2000 (1) Carnegie Center Office Princeton, NJ — 142,666 316,856 159,350 94,240 469,216 55,416 — 618,872 236,695 1983-2016 1998/1999/2000/2007/2014/2017/2019 (1) Atlantic Wharf Office Boston, MA — 63,988 454,537 19,831 63,988 474,368 — — 538,356 156,879 2011 2007 (1) 599 Lexington Avenue Office New York, NY — 81,040 100,507 247,001 87,852 340,696 — — 428,548 179,928 1986 1997 (1) Fountain Square Office Reston, VA — 56,853 306,298 29,595 56,853 335,893 — — 392,746 94,501 1986-1990 2012 (1) 510 Madison Avenue Office New York, NY — 103,000 253,665 28,825 103,000 282,490 — — 385,490 90,673 2012 2010 (1) 680 Folsom Street Office San Francisco, CA — 72,545 219,766 8,026 72,545 227,792 — — 300,337 63,864 2014 2012 (1) 145 Broadway Office Cambridge, MA — 121 273,013 25,992 23,367 275,759 — — 299,126 18,393 2019 1997 (1) 2200 Pennsylvania Avenue Office Washington, DC — — 183,541 110,980 105,787 188,734 — — 294,521 71,983 2011 2008 (1) South of Market and Democracy Tower Office Reston, VA — 13,603 237,479 21,882 13,687 259,277 — — 272,964 94,354 2008-2009 2003 (1) 601 Massachusetts Avenue Office Washington, DC — 95,310 165,173 3,965 95,322 169,126 — — 264,448 36,983 2016 2008 (1) Bay Colony Corporate Center Office Waltham, MA — 18,789 148,451 80,753 18,789 229,144 60 — 247,993 97,149 1985-1989 2011 (1) 535 Mission Street Office San Francisco, CA — 40,933 148,378 3,501 40,933 151,879 — — 192,812 37,477 2015 2013 (1) Mountain View Research Park Office Mountain View, CA — 95,066 68,373 16,801 95,066 85,174 — — 180,240 24,149 1977-1981/2007-2013 2013 (1) Reservoir Place Office Waltham, MA — 18,605 104,124 53,945 20,108 156,275 291 — 176,674 79,338 1955/1987/2017 1997/1998 (1) 1330 Connecticut Avenue Office Washington, DC — 25,982 82,311 37,161 27,135 118,319 — — 145,454 43,174 1984/2018 2004 (1) One Freedom Square Office Reston, VA — 9,929 84,504 41,978 11,293 125,118 — — 136,411 60,550 2000 2003 (1) Kingstowne Towne Center Office Alexandria, VA — 18,021 109,038 3,875 18,062 112,872 — — 130,934 49,475 2003-2006 2007 (1) Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Land and Improvements Building and Land Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Land Building One and Two Reston Overlook Office Reston, VA — 16,456 66,192 40,694 16,179 107,163 — — 123,342 55,487 1999 2000 (1) 140 Kendrick Street Office Needham, MA — 18,095 66,905 37,813 19,092 103,721 — — 122,813 40,242 2000 2004 (1) Shady Grove Innovation District Office Rockville, MD — 52,030 64,212 2,676 26,834 34,974 57,110 — 118,918 1,048 1968-1985 2021 (1) Weston Corporate Center Office Weston, MA — 25,753 92,312 32 25,854 92,243 — — 118,097 35,329 2010 2001 (1) 17Fifty Presidents Street Office Reston, VA — — 113,362 44 — 113,406 — — 113,406 7,840 2020 2013 (1) Discovery Square Office Reston, VA — 11,198 71,782 21,304 12,533 91,751 — — 104,284 50,358 2001 2003 (1) 355 Main Street Office Cambridge, MA — 18,863 53,346 24,995 21,173 76,031 — — 97,204 31,827 1981/1996/2013 2006 (1) 10 CityPoint Office Waltham, MA — 1,953 85,752 6,963 2,290 92,378 — — 94,668 17,327 2016 1997 (1) Two Freedom Square Office Reston, VA — 13,930 77,739 (184) 15,420 76,065 — — 91,485 33,696 2001 2003 (1) 90 Broadway Office Cambridge, MA — 19,104 52,078 18,876 20,785 69,273 — — 90,058 26,797 1983/1998/2013 2006 (1) 153 & 211 Second Avenue Office Waltham, MA — 33,233 55,940 — 33,233 55,940 — — 89,173 1,819 1964-2006 2021 (1) 230 CityPoint Office Waltham, MA — 13,189 49,823 23,874 13,807 73,079 — — 86,886 35,469 1992 2005 (1) 77 CityPoint Office Waltham, MA — 13,847 60,383 11,524 14,023 71,731 — — 85,754 31,832 2008 2001 (1) 20 CityPoint Office Waltham, MA — 4,887 72,764 7,071 4,887 79,835 — — 84,722 6,135 2020 2007 (1) Waltham Weston Corporate Center Office Waltham, MA — 10,385 60,694 12,662 11,097 72,644 — — 83,741 40,253 2003 1999 (1) 200 West Street Office Waltham, MA — 16,148 24,983 39,592 16,813 63,593 317 — 80,723 19,724 1999/2021 1997 (1) Sumner Square Office Washington, DC — 624 28,745 49,345 28,548 50,166 — — 78,714 29,871 1985 1999 (1) 2440 West El Camino Real Office Mountain View, CA — 16,741 51,285 6,290 16,741 57,575 — — 74,316 17,265 1987/2003 2011 (1) 300 Binney Street Office Cambridge, MA — 18,080 51,262 140 18,080 51,402 — — 69,482 14,537 2013 2009 (1) Reston Corporate Center Office Reston, VA — 9,135 50,857 6,236 10,148 56,080 — — 66,228 32,950 1984 1998 (1) Wisconsin Place Office Chevy Chase, MD — — 53,349 12,600 — 65,949 — — 65,949 28,025 2009 2004 (1) 255 Main Street Office Cambridge, MA — 134 25,110 34,260 548 58,956 — — 59,504 39,791 1987 1997 (1) University Place Office Cambridge, MA — — 37,091 16,512 6,004 47,599 — — 53,603 33,469 1985 1998 (1) 890 Winter Street Office Waltham, MA — 13,913 28,557 4,745 13,913 33,302 — — 47,215 3,928 1999 2019 (1) Capital Gallery Office Washington, DC — 4,725 29,565 9,681 8,662 35,309 — — 43,971 21,562 1981/2006 2007 (1) North First Business Park Office San Jose, CA — 23,398 13,069 4,545 23,377 17,635 — — 41,012 17,017 1981 2007 (1) 150 Broadway Office Cambridge, MA — 850 25,042 2,350 1,323 26,919 — — 28,242 14,833 1999 1997 (1) 105 Broadway Office Cambridge, MA — 1,299 12,943 12,723 2,395 24,570 — — 26,965 14,309 1990 1997 (1) Lexington Office Park Office Lexington, MA — 998 1,426 18,582 1,264 19,551 191 — 21,006 16,012 1982 1997 (1) The Point Office Waltham, MA — 6,395 10,040 421 6,492 10,364 — — 16,856 1,984 2015 2007 (1) 690 Folsom Street Office San Francisco, CA — 3,219 11,038 1,877 3,219 12,915 — — 16,134 3,354 2015 2012 (1) 195 West Street Office Waltham, MA — 1,611 6,652 7,470 1,858 13,875 — — 15,733 8,842 1990 1997 (1) 33 Hayden Avenue Office Lexington, MA — 266 3,234 11,501 425 14,576 — — 15,001 6,768 1979 1997 (1) 92-100 Hayden Avenue Office Lexington, MA — 594 6,748 6,259 802 12,799 — — 13,601 11,468 1985 1997 (1) 7501 Boston Boulevard, Building Seven Office Springfield, VA — 665 9,273 819 791 9,966 — — 10,757 5,937 1997 1997 (1) Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Land and Improvements Building and Land Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Land Building 7435 Boston Boulevard, Building One Office Springfield, VA — 392 3,822 5,016 659 8,571 — — 9,230 7,010 1982 1997 (1) 32 Hartwell Avenue Office Lexington, MA — 168 1,943 6,944 314 8,741 — — 9,055 2,734 1968/1979/1987 1997 (1) 7450 Boston Boulevard, Building Three Office Springfield, VA — 1,165 4,681 2,613 1,430 7,029 — — 8,459 4,774 1987 1998 (1) 250 Binney Street Office Cambridge, MA — 110 4,483 3,593 273 7,913 — — 8,186 6,593 1983 1997 (1) 8000 Grainger Court, Building Five Office Springfield, VA — 366 4,282 3,198 601 7,245 — — 7,846 6,093 1984 1997 (1) 453 Ravendale Drive Office Mountain View, CA — 5,477 1,090 676 5,477 1,766 — — 7,243 924 1977 2012 (1) 7300 Boston Boulevard, Building Thirteen Office Springfield, VA — 608 4,773 1,075 661 5,795 — — 6,456 2,527 2002 1997 (1) 17 Hartwell Avenue Office Lexington, MA — 26 150 6,078 65 6,189 — — 6,254 3,009 1968 1997 (1) 7601 Boston Boulevard, Building Eight Office Springfield, VA — 200 878 5,045 551 5,572 — — 6,123 4,986 1986 1997 (1) 7500 Boston Boulevard, Building Six Office Springfield, VA — 138 3,749 1,714 367 5,234 — — 5,601 4,536 1985 1997 (1) 8000 Corporate Court, Building Eleven Office Springfield, VA — 136 3,071 1,903 774 4,336 — — 5,110 3,455 1989 1997 (1) 7375 Boston Boulevard, Building Ten Office Springfield, VA — 23 2,685 1,005 93 3,620 — — 3,713 2,841 1988 1997 (1) 7451 Boston Boulevard, Building Two Office Springfield, VA — 249 1,542 1,858 613 3,036 — — 3,649 2,806 1982 1997 (1) 7374 Boston Boulevard, Building Four Office Springfield, VA — 241 1,605 1,664 398 3,112 — — 3,510 2,787 1984 1997 (1) The Skylyne Residential Oakland, CA — 28,962 239,077 1,097 28,962 240,174 — — 269,136 8,132 2020 N/A (1) Signature at Reston Residential Reston, VA — 27,076 190,580 838 27,076 191,418 — — 218,494 18,534 2018 2013 (1) Proto Kendall Square Residential Cambridge, MA — 9,243 127,248 3,336 9,245 130,582 — — 139,827 11,195 2018 2015 (1) The Avant at Reston Town Center Residential Reston, VA — 20,350 91,995 846 20,350 92,841 — — 113,191 19,681 2014 2010 (1) The Lofts at Atlantic Wharf Residential Boston, MA — 3,529 54,891 2,215 3,529 57,106 — — 60,635 15,689 2011 2007 (1) Boston Marriott Cambridge Hotel Cambridge, MA — 478 37,918 35,117 1,201 72,312 — — 73,513 51,600 1986/2017 1997 (1) Kendall Center Green Garage Garage Cambridge, MA — — 35,035 6,846 103 41,778 — — 41,881 15,818 1984 2006 (1) Kendall Center Yellow Garage Garage Cambridge, MA — 1,256 15,697 1,552 1,434 17,071 — — 18,505 6,939 2006 2004 (1) Kendall Center Blue Garage Garage Cambridge, MA — 1,163 11,633 2,111 1,579 13,328 — — 14,907 10,399 1990 1997 (1) Reston Next Development Reston, VA — — — 514,182 2,901 250,135 — 261,146 514,182 1,631 N/A 1998 N/A 2100 Pennsylvania Avenue Development Washington, DC — — — 393,094 185,203 — — 207,891 393,094 5,941 N/A N/A N/A 325 Main Street Development Cambridge, MA — 174 — 286,000 965 — — 285,209 286,174 — N/A 1997 N/A 880 Winter Street Development Waltham, MA — 15,597 37,255 (667) 15,597 19,614 — 16,974 52,185 1,247 1998 2019 N/A 180 CityPoint Development Waltham, MA — — — 50,776 — — — 50,776 50,776 — N/A 2006 N/A 103 CityPoint Development Waltham, MA — — — 14,663 — — — 14,663 14,663 — N/A 2007 N/A 777 Harrison Street Land San Francisco, CA — 144,647 — 26,800 — 47 171,400 — 171,447 11 N/A 2020 N/A 3625-3635 Peterson Way Land Santa Clara, CA — 63,206 — 4,541 — — 67,747 — 67,747 — N/A 2016 N/A Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Land and Improvements Building and Land Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Land Building Back Bay Station Master Plan Land Boston, MA — — — 53,432 — — 53,432 — 53,432 — N/A N/A N/A North First Master Plan Land San Jose, CA — 35,004 — 3,941 — — 38,945 — 38,945 — N/A 2007 N/A Plaza at Almaden Land San Jose, CA — — — 37,418 — — 37,418 — 37,418 — N/A 2006 N/A Reston Gateway Master Plan Land Reston, VA — — — 30,945 — — 30,945 — 30,945 — N/A 1998 N/A Springfield Metro Center Land Springfield, VA — — — 19,887 — — 19,887 — 19,887 — N/A 2007 N/A CityPoint South Master Plan Land Waltham, MA — — — 14,890 — — 14,890 — 14,890 — N/A N/A N/A Kendall Center Master Plan Land Cambridge, MA — — — 8,381 — — 8,381 — 8,381 — N/A 1997 N/A Broad Run Business Park Land Loudoun County, VA — — — 2,405 — — 2,405 — 2,405 — N/A 1998 N/A Weston Quarry Land Weston, MA — — — 1,249 — — 1,249 — 1,249 — N/A 2001 N/A Reston Overlook Master Plan Land Reston, VA — — — 79 — — 79 — 79 — N/A 2000 N/A $ 3,267,914 (2) $ 5,238,614 $ 13,216,859 $ 5,652,747 $ 5,445,112 (3) $ 17,208,581 (4) $ 560,355 (5) $ 894,172 $ 24,108,220 $ 5,848,183 Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $51,695. Accumulated Depreciation does not include approximately $35,778 of accumulated depreciation related to Furniture, Fixtures and Equipment. The aggregate cost and accumulated depreciation for tax purposes was approximately $21.8 billion and $4.9 billion, respectively. (1) Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to 40 years. (2) Includes unamortized deferred financing costs totaling approximately $(32.1) million. (3) Includes Right of Use Assets - Finance Leases and Right of Use Assets - Operating Leases of approximately $214,165 and $169,778, respectively. (4) Includes Right of Use Assets - Finance Leases of approximately $23,342. (5) Includes pre-development costs. Boston Properties, Inc. Real Estate and Accumulated Depreciation December 31, 2021, 2020 and 2019 (dollars in thousands) A summary of activity for real estate and accumulated depreciation is as follows: 2021 2020 2019 Real Estate: Balance at the beginning of the year $ 23,303,303 $ 22,844,697 $ 21,605,545 Additions to/improvements of real estate 1,145,084 996,989 1,671,898 Assets sold/written-off (340,167) (538,383) (432,746) Balance at the end of the year $ 24,108,220 $ 23,303,303 $ 22,844,697 Accumulated Depreciation: Balance at the beginning of the year $ 5,501,637 $ 5,239,179 $ 4,871,102 Depreciation expense 623,854 573,898 564,938 Assets sold/written-off (277,308) (311,440) (196,861) Balance at the end of the year $ 5,848,183 $ 5,501,637 $ 5,239,179 Note: Real Estate and Accumulated Depreciation amounts do not include Furniture, Fixtures and Equipment. Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Original Costs Land and Building Land Held Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Property Name Type Location Encumbrances Land Building 767 Fifth Avenue (the General Motors Building) Office New York, NY $ 2,281,016 $ 1,796,252 $ 1,532,654 $ 260,700 $ 1,796,252 $ 1,793,354 $ — $ — $ 3,589,606 $ 407,377 1968/2019 2013 (1) Prudential Center Office Boston, MA — 92,077 948,357 556,917 100,539 1,439,107 192 57,513 1,597,351 660,321 1965/1993/2002/2016-2017 1998/1999/2000 (1) Embarcadero Center Office San Francisco, CA — 179,697 847,410 418,084 180,420 1,264,771 — — 1,445,191 673,363 1970/1989 1998-1999 (1) 399 Park Avenue Office New York, NY — 339,200 700,358 306,841 339,200 1,007,199 — — 1,346,399 387,131 1961/2018 2002 (1) 601 Lexington Avenue Office New York, NY 986,898 241,600 494,782 448,942 279,281 906,043 — — 1,185,324 314,209 1977/1997/2021 2001 (1) Salesforce Tower Office San Francisco, CA — 200,349 946,205 7,515 200,349 953,720 — — 1,154,069 99,152 2018 2013 (1) 200 Clarendon Street and Garage Office Boston, MA — 219,543 667,884 222,640 250,560 859,507 — — 1,110,067 277,388 1976 2010 (1) 250 West 55th Street Office New York, NY — 285,263 603,167 52,298 285,263 655,465 — — 940,728 159,238 2014 2007 (1) 100 Federal Street Office Boston, MA — 131,067 435,954 138,727 131,067 574,681 — — 705,748 157,939 1971-1975/2017 2012 (1) Times Square Tower Office New York, NY — 165,413 380,438 77,864 159,694 464,021 — — 623,715 220,676 2004 2000 (1) Carnegie Center Office Princeton, NJ — 142,666 316,856 144,387 90,498 457,995 55,416 — 603,909 232,183 1983-2016 1998/1999/2000/2007/2014/2017/2019 (1) Atlantic Wharf Office Boston, MA — 63,988 454,537 19,831 63,988 474,368 — — 538,356 156,879 2011 2007 (1) 599 Lexington Avenue Office New York, NY — 81,040 100,507 219,759 81,040 320,266 — — 401,306 171,713 1986 1997 (1) Fountain Square Office Reston, VA — 56,853 306,298 29,595 56,853 335,893 — — 392,746 94,501 1986-1990 2012 (1) 510 Madison Avenue Office New York, NY — 103,000 253,665 28,825 103,000 282,490 — — 385,490 90,673 2012 2010 (1) 680 Folsom Street Office San Francisco, CA — 72,545 219,766 8,026 72,545 227,792 — — 300,337 63,864 2014 2012 (1) 145 Broadway Office Cambridge, MA — 121 273,013 25,789 23,164 275,759 — — 298,923 18,393 2019 1997 (1) 2200 Pennsylvania Avenue Office Washington, DC — — 183,541 110,980 105,787 188,734 — — 294,521 71,983 2011 2008 (1) South of Market and Democracy Tower Office Reston, VA — 13,603 237,479 21,546 13,603 259,025 — — 272,628 94,269 2008-2009 2003 (1) 601 Massachusetts Avenue Office Washington, DC — 95,310 165,173 3,953 95,310 169,126 — — 264,436 36,983 2016 2008 (1) Bay Colony Corporate Center Office Waltham, MA — 18,789 148,451 80,753 18,789 229,144 60 — 247,993 97,149 1985-1989 2011 (1) 535 Mission Street Office San Francisco, CA — 40,933 148,378 3,501 40,933 151,879 — — 192,812 37,477 2015 2013 (1) Mountain View Research Park Office Mountain View, CA — 95,066 68,373 16,801 95,066 85,174 — — 180,240 24,149 1977-1981/2007-2013 2013 (1) Reservoir Place Office Waltham, MA — 18,605 104,124 49,870 19,089 153,219 291 — 172,599 78,109 1955/1987/2017 1997/1998 (1) 1330 Connecticut Avenue Office Washington, DC — 25,982 82,311 32,548 25,982 114,859 — — 140,841 41,783 1984/2018 2004 (1) One Freedom Square Office Reston, VA — 9,929 84,504 36,341 9,883 120,891 — — 130,774 58,850 2000 2003 (1) Kingstowne Towne Center Office Alexandria, VA — 18,021 109,038 3,711 18,021 112,749 — — 130,770 49,433 2003-2006 2007 (1) One and Two Reston Overlook Office Reston, VA — 16,456 66,192 36,276 15,074 103,850 — — 118,924 54,155 1999 2000 (1) 140 Kendrick Street Office Needham, MA — 18,095 66,905 33,823 18,095 100,728 — — 118,823 39,039 2000 2004 (1) Shady Grove Innovation District Office Rockville, MD — 52,030 64,212 2,676 26,834 34,974 57,110 — 118,918 1,048 1968-1985 2021 (1) Weston Corporate Center Office Weston, MA — 25,753 92,312 32 25,854 92,243 — — 118,097 35,329 2010 2001 (1) Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Original Costs Land and Building Land Held Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Property Name Type Location Encumbrances Land Building 17Fifty Presidents Street Office Reston, VA — — 113,362 44 — 113,406 — — 113,406 7,840 2020 2013 (1) Discovery Square Office Reston, VA — 11,198 71,782 15,759 11,146 87,593 — — 98,739 48,686 2001 2003 (1) 355 Main Street Office Cambridge, MA — 18,863 53,346 24,697 21,098 75,808 — — 96,906 31,739 1981/1996/2013 2006 (1) 10 CityPoint Office Waltham, MA — 1,953 85,752 6,800 2,127 92,378 — — 94,505 17,327 2016 1997 (1) Two Freedom Square Office Reston, VA — 13,930 77,739 (6,396) 13,866 71,407 — — 85,273 31,823 2001 2003 (1) 90 Broadway Office Cambridge, MA — 19,104 52,078 18,697 20,741 69,138 — — 89,879 26,749 1983/1998/2013 2006 (1) 153 & 211 Second Avenue Office Waltham, MA — 33,233 55,940 — 33,233 55,940 — — 89,173 1,819 1964-2006 2021 (1) 230 CityPoint Office Waltham, MA — 13,189 49,823 22,257 13,403 71,866 — — 85,269 34,984 1992 2005 (1) 77 CityPoint Office Waltham, MA — 13,847 60,383 11,419 13,997 71,652 — — 85,649 31,804 2008 2001 (1) 20 CityPoint Office Waltham, MA — 4,887 72,764 7,071 4,887 79,835 — — 84,722 6,135 2020 2007 (1) Waltham Weston Corporate Center Office Waltham, MA — 10,385 60,694 9,675 10,350 70,404 — — 80,754 39,353 2003 1999 (1) 200 West Street Office Waltham, MA — 16,148 24,983 36,931 16,148 61,597 317 — 78,062 18,922 1999/2021 1997 (1) Sumner Square Office Washington, DC — 624 28,745 47,265 28,028 48,606 — — 76,634 29,247 1985 1999 (1) 2440 West El Camino Real Office Mountain View, CA — 16,741 51,285 6,290 16,741 57,575 — — 74,316 17,265 1987/2003 2011 (1) 300 Binney Street Office Cambridge, MA — 18,080 51,262 140 18,080 51,402 — — 69,482 14,537 2013 2009 (1) Reston Corporate Center Office Reston, VA — 9,135 50,857 3,625 9,496 54,121 — — 63,617 32,162 1984 1998 (1) Wisconsin Place Office Chevy Chase, MD — — 53,349 12,600 — 65,949 — — 65,949 28,025 2009 2004 (1) 255 Main Street Office Cambridge, MA — 134 25,110 32,604 134 57,714 — — 57,848 39,294 1987 1997 (1) University Place Office Cambridge, MA — — 37,091 15,062 6,004 46,149 — — 52,153 32,504 1985 1998 (1) 890 Winter Street Office Waltham, MA — 13,913 28,557 4,745 13,913 33,302 — — 47,215 3,928 1999 2019 (1) Capital Gallery Office Washington, DC — 4,725 29,565 5,018 6,128 33,180 — — 39,308 20,706 1981/2006 2007 (1) North First Business Park Office San Jose, CA — 23,398 13,069 4,522 23,371 17,618 — — 40,989 17,011 1981 2007 (1) 150 Broadway Office Cambridge, MA — 850 25,042 345 822 25,415 — — 26,237 14,225 1999 1997 (1) 105 Broadway Office Cambridge, MA — 1,299 12,943 10,617 1,868 22,991 — — 24,859 13,674 1990 1997 (1) Lexington Office Park Office Lexington, MA — 998 1,426 17,818 1,073 18,978 191 — 20,242 15,785 1982 1997 (1) The Point Office Waltham, MA — 6,395 10,040 421 6,492 10,364 — — 16,856 1,984 2015 2007 (1) 690 Folsom Street Office San Francisco, CA — 3,219 11,038 1,877 3,219 12,915 — — 16,134 3,354 2015 2012 (1) 195 West Street Office Waltham, MA — 1,611 6,652 6,481 1,611 13,133 — — 14,744 8,540 1990 1997 (1) 33 Hayden Avenue Office Lexington, MA — 266 3,234 10,864 266 14,098 — — 14,364 6,576 1979 1997 (1) 92-100 Hayden Avenue Office Lexington, MA — 594 6,748 5,530 619 12,253 — — 12,872 11,247 1985 1997 (1) 7501 Boston Boulevard, Building Seven Office Springfield, VA — 665 9,273 314 665 9,587 — — 10,252 5,783 1997 1997 (1) 7435 Boston Boulevard, Building One Office Springfield, VA — 392 3,822 4,323 486 8,051 — — 8,537 6,802 1982 1997 (1) 32 Hartwell Avenue Office Lexington, MA — 168 1,943 6,358 168 8,301 — — 8,469 2,557 1968/1979/1987 1997 (1) 7450 Boston Boulevard, Building Three Office Springfield, VA — 1,165 4,681 2,199 1,327 6,718 — — 8,045 4,646 1987 1998 (1) 250 Binney Street Office Cambridge, MA — 110 4,483 2,939 110 7,422 — — 7,532 6,399 1983 1997 (1) Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Original Costs Land and Building Land Held Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Property Name Type Location Encumbrances Land Building 8000 Grainger Court, Building Five Office Springfield, VA — 366 4,282 2,604 453 6,799 — — 7,252 5,916 1984 1997 (1) 453 Ravendale Drive Office Mountain View, CA — 5,477 1,090 676 5,477 1,766 — — 7,243 924 1977 2012 (1) 7300 Boston Boulevard, Building Thirteen Office Springfield, VA — 608 4,773 863 608 5,636 — — 6,244 2,463 2002 1997 (1) 17 Hartwell Avenue Office Lexington, MA — 26 150 5,921 26 6,071 — — 6,097 2,961 1968 1997 (1) 7601 Boston Boulevard, Building Eight Office Springfield, VA — 200 878 4,352 378 5,052 — — 5,430 4,778 1986 1997 (1) 7500 Boston Boulevard, Building Six Office Springfield, VA — 138 3,749 1,181 234 4,834 — — 5,068 4,376 1985 1997 (1) 8000 Corporate Court, Building Eleven Office Springfield, VA — 136 3,071 1,552 686 4,073 — — 4,759 3,346 1989 1997 (1) 7375 Boston Boulevard, Building Ten Office Springfield, VA — 23 2,685 824 47 3,485 — — 3,532 2,790 1988 1997 (1) 7451 Boston Boulevard, Building Two Office Springfield, VA — 249 1,542 1,545 535 2,801 — — 3,336 2,711 1982 1997 (1) 7374 Boston Boulevard, Building Four Office Springfield, VA — 241 1,605 1,281 303 2,824 — — 3,127 2,675 1984 1997 (1) The Skylyne Residential Oakland, CA — 28,962 239,077 1,097 28,962 240,174 — — 269,136 8,132 2020 N/A (1) Signature at Reston Residential Reston, VA — 27,076 190,580 838 27,076 191,418 — — 218,494 18,534 2018 2013 (1) Proto Kendall Square Residential Cambridge, MA — 9,243 127,248 3,336 9,245 130,582 — — 139,827 11,195 2018 2015 (1) The Avant at Reston Town Center Residential Reston, VA — 20,350 91,995 846 20,350 92,841 — — 113,191 19,681 2014 2010 (1) The Lofts at Atlantic Wharf Residential Boston, MA — 3,529 54,891 2,215 3,529 57,106 — — 60,635 15,689 2011 2007 (1) Boston Marriott Cambridge Hotel Cambridge, MA — 478 37,918 32,226 478 70,144 — — 70,622 50,729 1986/2017 1997 (1) Kendall Center Green Garage Garage Cambridge, MA — — 35,035 6,432 — 41,467 — — 41,467 15,695 1984 2006 (1) Kendall Center Yellow Garage Garage Cambridge, MA — 1,256 15,697 840 1,256 16,537 — — 17,793 6,727 2006 2004 (1) Kendall Center Blue Garage Garage Cambridge, MA — 1,163 11,633 446 1,163 12,079 — — 13,242 9,900 1990 1997 (1) Reston Next Development Reston, VA — — — 514,182 2,901 250,135 — 261,146 514,182 1,631 N/A 1998 N/A 2100 Pennsylvania Avenue Development Washington, DC — — — 393,094 185,203 — — 207,891 393,094 5,941 N/A N/A N/A 325 Main Street Development Cambridge, MA — 174 — 285,807 772 — — 285,209 285,981 — N/A 1997 N/A 880 Winter Street Development Waltham, MA — 15,597 37,255 (667) 15,597 19,614 — 16,974 52,185 1,247 1998 2019 N/A 180 CityPoint Development Waltham, MA — — — 50,776 — — — 50,776 50,776 — N/A 2006 N/A 103 CityPoint Development Waltham, MA — — — 14,663 — — — 14,663 14,663 — N/A 2007 N/A 777 Harrison Street Land San Francisco, CA — 144,647 — 26,800 — 47 171,400 — 171,447 11 N/A 2020 N/A 3625-3635 Peterson Way Land Santa Clara, CA — 63,206 — 4,541 — — 67,747 — 67,747 — N/A 2016 N/A Back Bay Station Master Plan Land Boston, MA — — — 53,432 — — 53,432 — 53,432 — N/A N/A N/A North First Master Plan Land San Jose, CA — 35,004 — 3,941 — — 38,945 — 38,945 — N/A 2007 N/A Plaza at Almaden Land San Jose, CA — — — 37,418 — — 37,418 — 37,418 — N/A 2006 N/A Reston Gateway Master Plan Land Reston, VA — — — 30,945 — — 30,945 — 30,945 — N/A 1998 N/A Springfield Metro Center Land Springfield, VA — — — 19,887 — — 19,887 — 19,887 — N/A 2007 N/A Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2021 (dollars in thousands) Original Costs Land and Building Land Held Development Total Accumulated Year(s) Built/ Year(s) Acquired Depreciable Property Name Type Location Encumbrances Land Building CityPoint South Master Plan Land Waltham, MA — — — 14,890 — — 14,890 — 14,890 — N/A N/A N/A Kendall Center Master Plan Land Cambridge, MA — — — 8,381 — — 8,381 — 8,381 — N/A 1997 N/A Broad Run Business Park Land Loudoun County, VA — — — 2,405 — — 2,405 — 2,405 — N/A 1998 N/A Weston Quarry Land Weston, MA — — — 1,249 — — 1,249 — 1,249 — N/A 2001 N/A Reston Overlook Master Plan Land Reston, VA — — — 79 — — 79 — 79 — N/A 2000 N/A $ 3,267,914 (2) $ 5,238,614 $ 13,216,859 $ 5,279,360 $ 5,348,929 (3) $ 16,931,377 (4) $ 560,355 (5) $ 894,172 $ 23,734,833 $ 5,736,240 Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $51,695. Accumulated Depreciation does not include approximately $35,778 of accumulated depreciation related to Furniture, Fixtures and Equipment. The aggregate cost and accumulated depreciation for tax purposes was approximately $24.2 billion and $5.4 billion, respectively. (1) Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to 40 years. (2) Includes unamortized deferred financing costs totaling approximately $(32.1) million. (3) Includes Right of Use Assets - Finance Leases and Right of Use Assets - Operating Leases of approximately $214,165 and $169,778, respectively. (4) Includes Right of Use Assets - Finance Leases of approximately $23,342. (5) Includes pre-development costs. Boston Properties Limited Partnership Real Estate and Accumulated Depreciation December 31, 2021, 2020 and 2019 (dollars in thousands) A summary of activity for real estate and accumulated depreciation is as follows: 2021 2020 2019 Real Estate: Balance at the beginning of the year $ 22,926,494 $ 22,449,476 $ 21,207,189 Additions to/improvements of real estate 1,145,084 996,989 1,671,898 Assets sold/written-off (336,745) (519,971) (429,611) Balance at the end of the year $ 23,734,833 $ 22,926,494 $ 22,449,476 Accumulated Depreciation: Balance at the beginning of the year $ 5,396,111 $ 5,135,289 $ 4,773,800 Depreciation expense 615,553 566,813 557,130 Assets sold/written-off (275,424) (305,991) (195,641) Balance at the end of the year $ 5,736,240 $ 5,396,111 $ 5,135,289 Note: Real Estate and Accumulated Depreciation amounts do not include Furniture, Fixtures and Equipment. |
