| 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, 2022 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Capitalized Subsequent to Acquisition Land and Improvements Building and Improvements Land Held for Development Development and Construction in Progress Total Accumulated Depreciation Year(s) Built/Renovated Year(s) Acquired Depreciable Lives (Years) Land Building 767 Fifth Avenue (the General Motors Building) Office New York, NY $ 2,284,510 $ 1,796,252 $ 1,532,654 $ 325,762 $ 1,796,252 $ 1,858,416 $ — $ — $ 3,654,668 $ 457,344 1968/2019 2013 (1) Prudential Center Office Boston, MA — 92,077 948,357 718,028 115,639 1,510,834 231 131,758 1,758,462 721,498 1965/1993/2002/2016-2017 1998/1999/2000 (1) Embarcadero Center Office San Francisco, CA — 179,697 847,410 499,451 195,986 1,330,572 — — 1,526,558 736,748 1970/1989 1998-1999 (1) 399 Park Avenue Office New York, NY — 339,200 700,358 393,821 354,107 1,079,272 — — 1,433,379 445,239 1961/2018 2002 (1) 601 Lexington Avenue Office New York, NY 987,858 241,600 494,782 515,644 289,639 962,387 — — 1,252,026 348,892 1977/1997/2021 2001 (1) Salesforce Tower Office San Francisco, CA — 200,349 946,205 7,462 200,349 953,667 — — 1,154,016 129,281 2018 2013 (1) 200 Clarendon Street and Garage Office Boston, MA — 219,543 667,884 235,129 250,512 872,044 — — 1,122,556 310,318 1976 2010 (1) 250 West 55th Street Office New York, NY — 285,263 603,167 51,800 285,263 654,967 — — 940,230 179,143 2014 2007 (1) 100 Federal Street Office Boston, MA — 131,067 435,954 119,341 131,067 555,295 — — 686,362 157,368 1971-1975/2017 2012 (1) Madison Centre Office Seattle, WA — 104,641 564,336 2,879 104,641 567,215 — — 671,856 13,611 2017 2022 (1) Times Square Tower Office New York, NY — 165,413 380,438 121,437 169,193 498,095 — — 667,288 241,474 2004 2000 (1) Carnegie Center Office Princeton, NJ — 142,666 316,856 168,261 94,243 476,990 55,919 631 627,783 252,390 1983-2016 1998/1999/2000/2007/2014/2017/2019 (1) 125 Broadway Office Cambridge, MA — 126,364 433,662 58 126,364 433,720 — — 560,084 4,503 2000 2022 (1) Atlantic Wharf Office Boston, MA — 63,988 454,537 24,158 63,988 478,695 — — 542,683 171,876 2011 2007 (1) Reston Next Office Reston, VA — 2,901 525,277 — 2,901 525,277 — — 528,178 15,293 2022 1998 (1) 599 Lexington Avenue Office New York, NY — 81,040 100,507 245,609 87,852 339,304 — — 427,156 182,121 1986 1997 (1) Fountain Square Office Reston, VA — 56,853 306,298 39,288 56,853 345,586 — — 402,439 104,864 1986-1990 2012 (1) 510 Madison Avenue Office New York, NY — 103,000 253,665 31,682 103,000 285,347 — — 388,347 95,520 2012 2010 (1) 325 Main Street Office Cambridge, MA — 21,596 312,492 — 21,596 312,492 — — 334,088 4,308 2022 1997 (1) 680 Folsom Street Office San Francisco, CA — 72,545 219,766 8,026 72,545 227,792 — — 300,337 72,414 2014 2012 (1) 145 Broadway Office Cambridge, MA — 121 273,013 26,184 23,367 275,951 — — 299,318 26,881 2019 1997 (1) 2200 Pennsylvania Avenue Office Washington, DC — — 183,541 113,108 104,329 192,320 — — 296,649 71,410 2011 2008 (1) South of Market and Democracy Tower Office Reston, VA — 13,603 237,479 28,991 13,687 266,386 — — 280,073 98,665 2008-2009 2003 (1) Bay Colony Corporate Center Office Waltham, MA — 18,789 148,451 87,804 18,789 231,828 4,427 — 255,044 105,172 1985-1989 2011 (1) 535 Mission Street Office San Francisco, CA — 40,933 148,378 3,852 40,934 152,229 — — 193,163 42,776 2015 2013 (1) Mountain View Research Park Office Mountain View, CA — 95,066 68,373 21,270 95,066 89,643 — — 184,709 28,575 1977-1981/2007-2013 2013 (1) Reservoir Place Office Waltham, MA — 18,605 104,124 55,359 20,108 156,915 1,065 — 178,088 85,394 1955/1987/2017 1997/1998 (1) Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2022 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Capitalized Subsequent to Acquisition Land and Improvements Building and Improvements Land Held for Development Development and Construction in Progress Total Accumulated Depreciation Year(s) Built/Renovated Year(s) Acquired Depreciable Lives (Years) Land Building 1330 Connecticut Avenue Office Washington, DC — 25,982 82,311 38,047 27,135 119,205 — — 146,340 48,273 1984/2018 2004 (1) One Freedom Square Office Reston, VA — 9,929 84,504 51,743 11,293 134,883 — — 146,176 66,084 2000 2003 (1) 880 Winter Street Office Waltham, MA — 15,597 37,255 91,537 15,597 128,792 — — 144,389 2,560 1998/2022 2019 (1) Kingstowne Towne Center Office Alexandria, VA — 18,021 109,038 3,822 18,062 112,819 — — 130,881 52,543 2003-2006 2007 (1) 140 Kendrick Street Office Needham, MA — 18,095 66,905 42,528 19,092 102,625 — 5,811 127,528 41,627 2000 2004 (1) Shady Grove Innovation District Office Rockville, MD — 52,030 64,212 7,219 26,834 34,988 61,639 — 123,461 3,319 1968-1985 2021 (1) One and Two Reston Overlook Office Reston, VA — 16,456 66,192 40,516 16,179 106,985 — — 123,164 57,631 1999 2000 (1) Weston Corporate Center Office Weston, MA — 25,753 92,312 968 25,854 93,179 — — 119,033 38,385 2010 2001 (1) 17Fifty Presidents Street Office Reston, VA — — 113,362 162 — 113,524 — — 113,524 12,232 2020 2013 (1) Discovery Square Office Reston, VA — 11,198 71,782 21,618 12,533 92,065 — — 104,598 54,116 2001 2003 (1) 355 Main Street Office Cambridge, MA — 18,863 53,346 25,418 21,173 76,454 — — 97,627 34,399 1981/1996/2013 2006 (1) 10 CityPoint Office Waltham, MA — 1,953 85,752 6,406 2,290 91,821 — — 94,111 20,616 2016 1997 (1) Two Freedom Square Office Reston, VA — 13,930 77,739 317 15,420 76,566 — — 91,986 35,850 2001 2003 (1) 200 West Street Office Waltham, MA — 16,148 24,983 49,264 16,813 73,265 317 — 90,395 23,428 1999/2021 1997 (1) 90 Broadway Office Cambridge, MA — 19,104 52,078 18,876 20,785 69,273 — — 90,058 29,294 1983/1998/2013 2006 (1) 153 & 211 Second Avenue Office Waltham, MA — 33,233 55,940 202 33,233 55,940 202 — 89,375 4,808 1964-2006 2021 (1) 230 CityPoint Office Waltham, MA — 13,189 49,823 24,604 13,807 73,809 — — 87,616 38,306 1992 2005 (1) 20 CityPoint Office Waltham, MA — 4,887 72,764 7,072 4,887 79,836 — — 84,723 9,606 2020 2007 (1) Waltham Weston Corporate Center Office Waltham, MA — 10,385 60,694 12,859 11,097 72,841 — — 83,938 42,839 2003 1999 (1) 77 CityPoint Office Waltham, MA — 13,847 60,383 9,701 14,023 69,908 — — 83,931 32,578 2008 2001 (1) Sumner Square Office Washington, DC — 624 28,745 49,302 28,205 50,466 — — 78,671 31,436 1985 1999 (1) 2440 West El Camino Real Office Mountain View, CA — 16,741 51,285 6,391 16,741 57,676 — — 74,417 19,375 1987/2003 2011 (1) 300 Binney Street Office Cambridge, MA — 18,080 51,262 1,268 18,080 51,402 1,128 — 70,610 18,995 2013 2009 (1) Reston Corporate Center Office Reston, VA — 9,135 50,857 5,579 10,148 55,423 — — 65,571 33,822 1984 1998 (1) Wisconsin Place Office Chevy Chase, MD — — 53,349 11,204 — 64,553 — — 64,553 26,659 2009 2004 (1) 255 Main Street Office Cambridge, MA — 134 25,110 33,597 548 58,293 — — 58,841 42,204 1987 1997 (1) University Place Office Cambridge, MA — — 37,091 15,903 5,425 47,569 — — 52,994 35,296 1985 1998 (1) 890 Winter Street Office Waltham, MA — 13,913 28,557 6,998 13,913 35,555 — — 49,468 5,409 1999 2019 (1) Capital Gallery Office Washington, DC — 4,725 29,565 9,544 8,662 35,172 — — 43,834 22,415 1981/2006 2007 (1) North First Business Park Office San Jose, CA — 23,398 13,069 5,288 23,378 18,377 — — 41,755 17,270 1981 2007 (1) 150 Broadway Office Cambridge, MA — 850 25,042 15,726 1,323 40,295 — — 41,618 16,841 1999 1997 (1) 105 Broadway Office Cambridge, MA — 1,299 12,943 12,718 2,390 24,570 — — 26,960 15,578 1990 1997 (1) Lexington Office Park Office Lexington, MA — 998 1,426 19,842 1,263 19,551 1,452 — 22,266 16,716 1982 1997 (1) The Point Office Waltham, MA — 6,395 10,040 546 6,492 10,489 — — 16,981 2,308 2015 2007 (1) 690 Folsom Street Office San Francisco, CA — 3,219 11,038 1,877 3,219 12,915 — — 16,134 3,838 2015 2012 (1) 33 Hayden Avenue Office Lexington, MA — 266 3,234 11,501 425 14,576 — — 15,001 7,929 1979 1997 (1) Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2022 (dollars in thousands) Property Name Type Location Encumbrances Original Costs Capitalized Subsequent to Acquisition Land and Improvements Building and Improvements Land Held for Development Development and Construction in Progress Total Accumulated Depreciation Year(s) Built/Renovated Year(s) Acquired Depreciable Lives (Years) Land Building Avant Retail Office Reston, VA — 1,499 6,647 2,577 1,499 9,224 — — 10,723 3,210 2014 2010 (1) 92-100 Hayden Avenue Office Lexington, MA — 594 6,748 2,297 778 8,861 — — 9,639 7,507 1985 1997 (1) 32 Hartwell Avenue Office Lexington, MA — 168 1,943 6,944 314 8,741 — — 9,055 3,103 1968/1979/1987 1997 (1) 250 Binney Street Office Cambridge, MA — 110 4,483 3,593 273 7,913 — — 8,186 6,974 1983 1997 (1) 453 Ravendale Drive Office Mountain View, CA — 5,477 1,090 677 5,477 1,767 — — 7,244 964 1977 2012 (1) 17 Hartwell Avenue Office Lexington, MA — 26 150 6,064 65 6,175 — — 6,240 3,530 1968 1997 (1) The Skylyne Residential Oakland, CA — 28,962 239,077 1,784 28,962 240,861 — — 269,823 14,154 2020 N/A (1) Signature at Reston Residential Reston, VA — 27,076 190,580 1,667 27,076 192,247 — — 219,323 23,353 2018 2013 (1) Proto Kendall Square Residential Cambridge, MA — 9,243 127,248 3,336 9,245 130,582 — — 139,827 14,508 2018 2015 (1) The Lofts at Atlantic Wharf Residential Boston, MA — 3,529 54,891 2,356 3,529 57,247 — — 60,776 17,174 2011 2007 (1) Boston Marriott Cambridge Hotel Cambridge, MA — 478 37,918 32,837 1,201 69,521 511 — 71,233 51,568 1986/2017 1997 (1) Kendall Center Green Garage Garage Cambridge, MA — — 35,035 6,798 103 41,730 — — 41,833 17,039 1984 2006 (1) Kendall Center Yellow Garage Garage Cambridge, MA — 1,256 15,697 1,653 1,434 17,172 — — 18,606 7,395 2006 2004 (1) Kendall Center Blue Garage Garage Cambridge, MA — 1,163 11,633 2,111 1,579 13,328 — — 14,907 13,075 1990 1997 (1) 2100 Pennsylvania Avenue Development Washington, DC — — — 472,873 185,203 230,497 — 57,173 472,873 9,755 N/A N/A N/A 190 CityPoint (formerly 180 CityPoint) Development Waltham, MA — — — 140,370 — — — 140,370 140,370 — N/A 2006 N/A 103 CityPoint Development Waltham, MA — — — 44,752 — — 74 44,678 44,752 — N/A 2007 N/A Reston Next Office Phase II Development Reston, VA — — — 22,954 — — — 22,954 22,954 — N/A 1998 N/A Reston Next Retail Development Reston, VA — — — 3,199 — — — 3,199 3,199 — N/A 1998 N/A 777 Harrison Street Land San Francisco, CA — 144,647 — 28,239 — 47 172,839 — 172,886 20 N/A 2020 N/A Kendall Center Master Plan Land Cambridge, MA — — — 148,476 — — 148,476 — 148,476 — N/A 1997 N/A Back Bay Station Master Plan Land Boston, MA — — — 72,957 — — 72,957 — 72,957 — N/A N/A N/A 3625-3635 Peterson Way Land Santa Clara, CA — 63,206 — 5,165 — — 68,371 — 68,371 — N/A 2016 N/A North First Master Plan Land San Jose, CA — 35,004 — 3,968 — — 38,972 — 38,972 — N/A 2007 N/A Plaza at Almaden Land San Jose, CA — — — 38,090 — — 38,090 — 38,090 — N/A 2006 N/A Springfield Metro Center Land Springfield, VA — — — 19,891 — — 19,891 — 19,891 — N/A 2007 N/A CityPoint South Master Plan Land Waltham, MA — — — 19,693 — — 19,693 — 19,693 — N/A N/A N/A Reston Gateway Master Plan Land Reston, VA — — — 12,734 — — 12,734 — 12,734 — N/A 1998 N/A Weston Quarry Land Weston, MA — — — 1,249 — — 1,249 — 1,249 — N/A 2001 N/A Broad Run Business Park Land Loudoun County, VA — — — 1,184 — — 1,184 — 1,184 — N/A 1998 N/A Reston Overlook Master Plan Land Reston, VA — — — 80 — — 80 — 80 — N/A 2000 N/A $ 3,272,368 (2) $ 5,373,987 $ 14,755,092 $ 5,615,135 $ 5,571,327 (3) $ 19,044,812 (4) $ 721,501 (5) $ 406,574 $ 25,744,214 $ 6,260,992 Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $50,310. Accumulated Depreciation does not include approximately $37,090 of accumulated depreciation related to Furniture, Fixtures and Equipment. Office type includes office, life sciences, and retail properties. The aggregate cost and accumulated depreciation for tax purposes was approximately $23.1 billion and $5.0 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 $27,632. (3) Includes Right of Use Assets - Finance Leases and Right of Use Assets - Operating Leases of approximately $214,165 and $167,351, respectively. (4) Includes Right of Use Assets - Finance Leases of approximately $23,345. (5) Includes pre-development costs. Boston Properties, Inc. Real Estate and Accumulated Depreciation December 31, 2022, 2021 and 2020 (dollars in thousands) A summary of activity for real estate and accumulated depreciation is as follows: 2022 2021 2020 Real Estate: Balance at the beginning of the year $ 24,108,220 $ 23,303,303 $ 22,844,697 Additions to/improvements of real estate 2,228,000 1,145,084 996,989 Assets sold/written-off (592,006) (340,167) (538,383) Balance at the end of the year $ 25,744,214 $ 24,108,220 $ 23,303,303 Accumulated Depreciation: Balance at the beginning of the year $ 5,848,183 $ 5,501,637 $ 5,239,179 Depreciation expense 646,020 623,854 573,898 Assets sold/written-off (233,211) (277,308) (311,440) Balance at the end of the year $ 6,260,992 $ 5,848,183 $ 5,501,637 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, 2022 (dollars in thousands) Original Costs Capitalized Subsequent to Acquisition Land and Improvements Building and Improvements Land Held for Development Development and Construction in Progress Total Accumulated Depreciation Year(s) Built/Renovated Year(s) Acquired Depreciable Lives Property Name Type Location Encumbrances Land Building 767 Fifth Avenue (the General Motors Building) Office New York, NY $ 2,284,510 $ 1,796,252 $ 1,532,654 $ 325,762 $ 1,796,252 $ 1,858,416 $ — $ — $ 3,654,668 $ 457,344 1968/2019 2013 (1) Prudential Center Office Boston, MA — 92,077 948,357 658,972 100,541 1,466,876 231 131,758 1,699,406 702,725 1965/1993/2002/2016-2017 1998/1999/2000 (1) Embarcadero Center Office San Francisco, CA — 179,697 847,410 437,070 180,419 1,283,758 — — 1,464,177 716,657 1970/1989 1998-1999 (1) 399 Park Avenue Office New York, NY — 339,200 700,358 334,213 339,200 1,034,571 — — 1,373,771 426,148 1961/2018 2002 (1) 601 Lexington Avenue Office New York, NY 987,858 241,600 494,782 478,558 279,281 935,659 — — 1,214,940 337,421 1977/1997/2021 2001 (1) Salesforce Tower Office San Francisco, CA — 200,349 946,205 7,462 200,349 953,667 — — 1,154,016 129,281 2018 2013 (1) 200 Clarendon Street and Garage Office Boston, MA — 219,543 667,884 235,129 250,512 872,044 — — 1,122,556 310,318 1976 2010 (1) 250 West 55th Street Office New York, NY — 285,263 603,167 51,800 285,263 654,967 — — 940,230 179,143 2014 2007 (1) 100 Federal Street Office Boston, MA — 131,067 435,954 119,341 131,067 555,295 — — 686,362 157,368 1971-1975/2017 2012 (1) Madison Centre Office Seattle, WA — 104,641 564,336 2,879 104,641 567,215 671,856 13,611 2017 2022 (1) Times Square Tower Office New York, NY — 165,413 380,438 83,458 159,694 469,615 — — 629,309 229,310 2004 2000 (1) Carnegie Center Office Princeton, NJ — 142,666 316,856 153,298 90,501 465,769 55,919 631 612,820 247,525 1983-2016 1998/1999/2000/2007/2014/2017/2019 (1) 125 Broadway Office Cambridge, MA — 126,364 433,662 58 126,364 433,720 — — 560,084 4,503 2000 2022 (1) Atlantic Wharf Office Boston, MA — 63,988 454,537 24,158 63,988 478,695 — — 542,683 171,876 2011 2007 (1) Reston Next Office Reston, VA — 2,901 525,277 — 2,901 525,277 — — 528,178 15,293 2022 1998 (1) 599 Lexington Avenue Office New York, NY — 81,040 100,507 218,367 81,040 318,874 — — 399,914 173,396 1986 1997 (1) Fountain Square Office Reston, VA — 56,853 306,298 39,288 56,853 345,586 — — 402,439 104,864 1986-1990 2012 (1) 510 Madison Avenue Office New York, NY — 103,000 253,665 31,682 103,000 285,347 — — 388,347 95,520 2012 2010 (1) 325 Main Street Office Cambridge, MA — 21,596 312,492 (193) 21,403 312,492 — — 333,895 4,308 2022 1997 (1) 680 Folsom Street Office San Francisco, CA — 72,545 219,766 8,026 72,545 227,792 — — 300,337 72,414 2014 2012 (1) 145 Broadway Office Cambridge, MA — 121 273,013 25,981 23,164 275,951 — — 299,115 26,881 2019 1997 (1) 2200 Pennsylvania Avenue Office Washington, DC — — 183,541 113,108 104,329 192,320 — — 296,649 71,410 2011 2008 (1) South of Market and Democracy Tower Office Reston, VA — 13,603 237,479 28,655 13,603 266,134 — — 279,737 98,574 2008-2009 2003 (1) Bay Colony Corporate Center Office Waltham, MA — 18,789 148,451 87,804 18,789 231,828 4,427 — 255,044 105,172 1985-1989 2011 (1) 535 Mission Street Office San Francisco, CA — 40,933 148,378 3,852 40,934 152,229 — — 193,163 42,776 2015 2013 (1) Mountain View Research Park Office Mountain View, CA — 95,066 68,373 21,270 95,066 89,643 — — 184,709 28,575 1977-1981/2007-2013 2013 (1) Reservoir Place Office Waltham, MA — 18,605 104,124 51,284 19,089 153,859 1,065 — 174,013 84,089 1955/1987/2017 1997/1998 (1) 1330 Connecticut Avenue Office Washington, DC — 25,982 82,311 33,434 25,982 115,745 — — 141,727 46,795 1984/2018 2004 (1) One Freedom Square Office Reston, VA — 9,929 84,504 46,106 9,883 130,656 — — 140,539 64,278 2000 2003 (1) 880 Winter Street Office Waltham, MA — 15,597 37,255 91,537 15,597 128,792 — — 144,389 2,560 1998/2022 2019 (1) Kingstowne Towne Center Office Alexandria, VA — 18,021 109,038 3,658 18,021 112,696 — — 130,717 52,498 2003-2006 2007 (1) 140 Kendrick Street Office Needham, MA — 18,095 66,905 38,538 18,095 99,632 — 5,811 123,538 40,368 2000 2004 (1) Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2022 (dollars in thousands) Original Costs Capitalized Subsequent to Acquisition Land and Improvements Building and Improvements Land Held for Development Development and Construction in Progress Total Accumulated Depreciation Year(s) Built/Renovated Year(s) Acquired Depreciable Lives Property Name Type Location Encumbrances Land Building Shady Grove Innovation District Office Rockville, MD — 52,030 64,212 7,219 26,834 34,988 61,639 — 123,461 3,319 1968-1985 2021 (1) One and Two Reston Overlook Office Reston, VA — 16,456 66,192 36,098 15,074 103,672 — — 118,746 56,216 1999 2000 (1) Weston Corporate Center Office Weston, MA — 25,753 92,312 968 25,854 93,179 — — 119,033 38,385 2010 2001 (1) 17Fifty Presidents Street Office Reston, VA — — 113,362 162 — 113,524 — — 113,524 12,232 2020 2013 (1) Discovery Square Office Reston, VA — 11,198 71,782 16,073 11,146 87,907 — — 99,053 52,341 2001 2003 (1) 355 Main Street Office Cambridge, MA — 18,863 53,346 25,120 21,098 76,231 — — 97,329 34,306 1981/1996/2013 2006 (1) 10 CityPoint Office Waltham, MA — 1,953 85,752 6,243 2,127 91,821 — — 93,948 20,616 2016 1997 (1) Two Freedom Square Office Reston, VA — 13,930 77,739 (5,895) 13,866 71,908 — — 85,774 33,860 2001 2003 (1) 200 West Street Office Waltham, MA — 16,148 24,983 46,603 16,148 71,269 317 — 87,734 22,576 1999/2021 1997 (1) 90 Broadway Office Cambridge, MA — 19,104 52,078 18,697 20,741 69,138 — — 89,879 29,243 1983/1998/2013 2006 (1) 153 & 211 Second Avenue Office Waltham, MA — 33,233 55,940 202 33,233 55,940 202 — 89,375 4,808 1964-2006 2021 (1) 230 CityPoint Office Waltham, MA — 13,189 49,823 22,987 13,403 72,596 — — 85,999 37,791 1992 2005 (1) 20 CityPoint Office Waltham, MA — 4,887 72,764 7,072 4,887 79,836 — — 84,723 9,606 2020 2007 (1) Waltham Weston Corporate Center Office Waltham, MA — 10,385 60,694 9,872 10,350 70,601 — — 80,951 41,883 2003 1999 (1) 77 CityPoint Office Waltham, MA — 13,847 60,383 9,596 13,997 69,829 — — 83,826 32,548 2008 2001 (1) Sumner Square Office Washington, DC — 624 28,745 47,222 27,685 48,906 — — 76,591 30,773 1985 1999 (1) 2440 West El Camino Real Office Mountain View, CA — 16,741 51,285 6,391 16,741 57,676 — — 74,417 19,375 1987/2003 2011 (1) 300 Binney Street Office Cambridge, MA — 18,080 51,262 1,268 18,080 51,402 1,128 — 70,610 18,995 2013 2009 (1) Reston Corporate Center Office Reston, VA — 9,135 50,857 2,968 9,496 53,464 — — 62,960 32,986 1984 1998 (1) Wisconsin Place Office Chevy Chase, MD — — 53,349 11,204 — 64,553 — — 64,553 26,659 2009 2004 (1) 255 Main Street Office Cambridge, MA — 134 25,110 31,941 134 57,051 — — 57,185 41,677 1987 1997 (1) University Place Office Cambridge, MA — — 37,091 14,453 5,425 46,119 — — 51,544 34,270 1985 1998 (1) 890 Winter Street Office Waltham, MA — 13,913 28,557 6,998 13,913 35,555 — — 49,468 5,409 1999 2019 (1) Capital Gallery Office Washington, DC — 4,725 29,565 4,882 6,128 33,044 — — 39,172 21,506 1981/2006 2007 (1) North First Business Park Office San Jose, CA — 23,398 13,069 5,265 23,372 18,360 — — 41,732 17,264 1981 2007 (1) 150 Broadway Office Cambridge, MA — 850 25,042 13,721 822 38,791 — — 39,613 16,195 1999 1997 (1) 105 Broadway Office Cambridge, MA — 1,299 12,943 10,611 1,862 22,991 — — 24,853 14,898 1990 1997 (1) Lexington Office Park Office Lexington, MA — 998 1,426 19,078 1,072 18,978 1,452 — 21,502 16,474 1982 1997 (1) The Point Office Waltham, MA — 6,395 10,040 546 6,492 10,489 — — 16,981 2,308 2015 2007 (1) 690 Folsom Street Office San Francisco, CA — 3,219 11,038 1,877 3,219 12,915 — — 16,134 3,838 2015 2012 (1) 33 Hayden Avenue Office Lexington, MA — 266 3,234 10,864 266 14,098 — — 14,364 7,725 1979 1997 (1) Avant Retail Office Reston, VA — 1,499 6,647 2,577 1,499 9,224 — — 10,723 3,210 2014 2010 (1) 92-100 Hayden Avenue Office Lexington, MA — 594 6,748 1,568 595 8,315 — — 8,910 7,273 1985 1997 (1) 32 Hartwell Avenue Office Lexington, MA — 168 1,943 6,358 168 8,301 — — 8,469 2,915 1968/1979/1987 1997 (1) 250 Binney Street Office Cambridge, MA — 110 4,483 2,939 110 7,422 — — 7,532 6,769 1983 1997 (1) Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2022 (dollars in thousands) Original Costs Capitalized Subsequent to Acquisition Land and Improvements Building and Improvements Land Held for Development Development and Construction in Progress Total Accumulated Depreciation Year(s) Built/Renovated Year(s) Acquired Depreciable Lives Property Name Type Location Encumbrances Land Building 453 Ravendale Drive Office Mountain View, CA — 5,477 1,090 677 5,477 1,767 — — 7,244 964 1977 2012 (1) 17 Hartwell Avenue Office Lexington, MA — 26 150 5,907 26 6,057 — — 6,083 3,479 1968 1997 (1) The Skylyne Residential Oakland, CA — 28,962 239,077 1,784 28,962 240,861 — — 269,823 14,154 2020 N/A (1) Signature at Reston Residential Reston, VA — 27,076 190,580 1,667 27,076 192,247 — — 219,323 23,353 2018 2013 (1) Proto Kendall Square Residential Cambridge, MA — 9,243 127,248 3,336 9,245 130,582 — — 139,827 14,508 2018 2015 (1) The Lofts at Atlantic Wharf Residential Boston, MA — 3,529 54,891 2,356 3,529 57,247 — — 60,776 17,174 2011 2007 (1) Boston Marriott Cambridge Hotel Cambridge, MA — 478 37,918 29,946 478 67,353 511 — 68,342 50,642 1986/2017 1997 (1) Kendall Center Green Garage Garage Cambridge, MA — — 35,035 6,384 — 41,419 — — 41,419 16,909 1984 2006 (1) Kendall Center Yellow Garage Garage Cambridge, MA — 1,256 15,697 941 1,256 16,638 — — 17,894 7,170 2006 2004 (1) Kendall Center Blue Garage Garage Cambridge, MA — 1,163 11,633 446 1,163 12,079 — — 13,242 12,006 1990 1997 (1) 2100 Pennsylvania Avenue Development Washington, DC — — — 472,873 185,203 230,497 — 57,173 472,873 9,755 N/A N/A N/A 190 CityPoint (formerly 180 CityPoint) Development Waltham, MA — — — 140,370 — — — 140,370 140,370 — N/A 2006 N/A 103 CityPoint Development Waltham, MA — — — 44,752 — — 74 44,678 44,752 — N/A 2007 N/A Reston Next Office Phase II Development Reston, VA — — — 22,954 — — — 22,954 22,954 — N/A 1998 N/A Reston Next Retail Development Reston, VA — — — 3,199 — — — 3,199 3,199 — N/A 1998 N/A 777 Harrison Street Land San Francisco, CA — 144,647 — 28,239 — 47 172,839 — 172,886 20 N/A 2020 N/A Kendall Center Master Plan Land Cambridge, MA — — — 148,476 — — 148,476 — 148,476 — N/A 1997 N/A Back Bay Station Master Plan Land Boston, MA — — — 72,957 — — 72,957 — 72,957 — N/A N/A N/A 3625-3635 Peterson Way Land Santa Clara, CA — 63,206 — 5,165 — — 68,371 — 68,371 — N/A 2016 N/A North First Master Plan Land San Jose, CA — 35,004 — 3,968 — — 38,972 — 38,972 — N/A 2007 N/A Plaza at Almaden Land San Jose, CA — — — 38,090 — — 38,090 — 38,090 — N/A 2006 N/A Springfield Metro Center Land Springfield, VA — — — 19,891 — — 19,891 — 19,891 — N/A 2007 N/A CityPoint South Master Plan Land Waltham, MA — — — 19,693 — — 19,693 — 19,693 — N/A N/A N/A Reston Gateway Master Plan Land Reston, VA — — — 12,734 — — 12,734 — 12,734 — N/A 1998 N/A Weston Quarry Land Weston, MA — — — 1,249 — — 1,249 — 1,249 — N/A 2001 N/A Broad Run Business Park Land Loudoun County, VA — — — 1,184 — — 1,184 — 1,184 — N/A 1998 N/A Reston Overlook Master Plan Land Reston, VA — — — 80 — — 80 — 80 — N/A 2000 N/A $ 3,272,368 (2) $ 5,373,987 $ 14,755,092 $ 5,247,621 $ 5,476,618 (3) $ 18,772,007 (4) $ 721,501 (5) $ 406,574 $ 25,376,700 $ 6,143,384 Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $50,310. Accumulated Depreciation does not include approximately $37,090 of accumulated depreciation related to Furniture, Fixtures and Equipment. Office type includes office, life sciences, and retail properties. The aggregate cost and accumulated depreciation for tax purposes was approximately $25.7 billion and $5.6 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 $27,632. (3) Includes Right of Use Assets - Finance Leases and Right of Use Assets - Operating Leases of approximately $214,165 and $167,351, respectively. (4) Includes Right of Use Assets - Finance Leases of approximately $23,345. (5) Includes pre-development costs. Boston Properties Limited Partnership Real Estate and Accumulated Depreciation December 31, 2022, 2021 and 2020 (dollars in thousands) A summary of activity for real estate and accumulated depreciation is as follows: 2022 2021 2020 Real Estate: Balance at the beginning of the year $ 23,734,833 $ 22,926,494 $ 22,449,476 Additions to/improvements of real estate 2,228,000 1,145,084 996,989 Assets sold/written-off (586,133) (336,745) (519,971) Balance at the end of the year $ 25,376,700 $ 23,734,833 $ 22,926,494 Accumulated Depreciation: Balance at the beginning of the year $ 5,736,240 $ 5,396,111 $ 5,135,289 Depreciation expense 638,538 615,553 566,813 Assets sold/written-off (231,394) (275,424) (305,991) Balance at the end of the year $ 6,143,384 $ 5,736,240 $ 5,396,111 Note: Real Estate and Accumulated Depreciation amounts do not include Furniture, Fixtures and Equipment. |
