XML 53 R27.htm IDEA: XBRL DOCUMENT v3.20.4

SEC Schedule, Article 12-28, Real Estate and Accumulated Depreciation

12 Months Ended

Dec. 31, 2020

SEC Schedule, 12-28, Real Estate Companies, Investment in Real Estate and Accumulated Depreciation Disclosure [Abstract]

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, 2020 (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																																																			$	2,277,522					$	1,796,252					$	1,532,654					$	227,450					$	1,796,252					$	1,760,104					$	—					$	—					$	3,556,356					$	364,145					1968/2019						2013						(1)
Prudential Center						Office						Boston, MA						—						92,077						948,357						573,187						115,638						1,480,302						17,681						—						1,613,621						634,402						1965/1993/2002/2016-2017						1998/1999/2000						(1)
Embarcadero Center						Office						San Francisco, CA						—						179,697						847,410						469,860						195,987						1,300,980						—						—						1,496,967						680,507						1970/1989						1998-1999						(1)
399 Park Avenue						Office						New York, NY						—						339,200						700,358						340,960						354,107						1,026,411						—						—						1,380,518						387,217						1961/2018						2002						(1)
601 Lexington Avenue						Office						New York, NY						630,068						241,600						494,782						446,950						289,639						663,694						—						229,999						1,183,332						284,477						1977/1997						2001						(1)
Salesforce Tower						Office						San Francisco, CA						—						200,349						946,205						5,355						200,349						951,560						—						—						1,151,909						68,918						2018						2013						(1)
200 Clarendon Street and Garage						Office						Boston, MA						—						219,543						667,884						218,821						251,374						854,874						—						—						1,106,248						244,882						1976						2010						(1)
250 West 55th Street						Office						New York, NY						—						285,263						603,167						51,860						285,263						655,027						—						—						940,290						138,004						2014						2007						(1)
100 Federal Street						Office						Boston, MA						—						131,067						435,954						111,196						131,067						547,150						—						—						678,217						141,629						1971-1975/2017						2012						(1)
Times Square Tower						Office						New York, NY						—						165,413						380,438						108,206						169,193						484,864						—						—						654,057						217,845						2004						2000						(1)
Carnegie Center						Office						Princeton, NJ						—						142,666						316,856						153,797						94,240						463,959						55,120						—						613,319						221,323						1983-2016						1998/1999/2000/2007/2014/2017/2019						(1)
Atlantic Wharf						Office						Boston, MA						—						63,988						454,537						18,538						63,988						473,075						—						—						537,063						146,860						2011						2007						(1)
599 Lexington Avenue						Office						New York, NY						—						81,040						100,507						214,275						87,852						307,970						—						—						395,822						193,058						1986						1997						(1)
510 Madison Avenue						Office						New York, NY						—						103,000						253,665						28,446						103,000						282,111						—						—						385,111						81,517						2012						2010						(1)
Fountain Square						Office						Reston, VA						—						56,853						306,298						21,030						56,853						327,328						—						—						384,181						90,047						1986-1990						2012						(1)
680 Folsom Street						Office						San Francisco, CA						—						72,545						219,766						7,917						72,545						227,683						—						—						300,228						55,319						2014						2012						(1)
145 Broadway						Office						Cambridge, MA						—						121						273,013						25,712						23,367						275,479						—						—						298,846						9,941						2019						1997						(1)
2200 Pennsylvania Avenue						Office						Washington, DC						—						—						183,541						112,436						107,356						188,621						—						—						295,977						66,072						2011						2008						(1)
South of Market and Democracy Tower						Office						Reston, VA						—						13,603						237,479						41,163						13,687						278,558						—						—						292,245						107,358						2008-2009						2003						(1)
601 Massachusetts Avenue						Office						Washington, DC						—						95,310						165,173						3,945						95,322						169,106						—						—						264,428						30,743						2016						2008						(1)
Bay Colony Corporate Center						Office						Waltham, MA						—						18,789						148,451						81,302						18,789						229,753						—						—						248,542						89,232						1985-1989						2011						(1)
535 Mission Street						Office						San Francisco, CA						—						40,933						148,378						3,287						40,933						151,665						—						—						192,598						31,953						2015						2013						(1)
Mountain View Research Park						Office						Mountain View, CA						—						95,066						68,373						18,479						95,066						86,852						—						—						181,918						21,725						1977-1981/2007-2013						2013						(1)
Reservoir Place						Office						Waltham, MA						—						18,605						104,124						57,154						20,108						159,775						—						—						179,883						76,993						1955/1987/2017						1997/1998						(1)
1330 Connecticut Avenue						Office						Washington, DC						—						25,982						82,311						37,049						27,135						118,207						—						—						145,342						38,000						1984/2018						2004						(1)
One Freedom Square						Office						Reston, VA						—						9,929						84,504						39,884						11,293						123,024						—						—						134,317						62,808						2000						2003						(1)
Kingstowne Towne Center						Office						Alexandria, VA						—						18,021						109,038						3,299						18,062						112,296						—						—						130,358						46,469						2003-2006						2007						(1)

Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2020 (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
																								One and Two Reston Overlook						Office															Reston, VA																																																			—						16,456						66,192						46,762						16,179						113,231						—						—						129,410						57,441						1999						2000						(1)
Weston Corporate Center						Office						Weston, MA						—						25,753						92,312						(5)						25,854						92,206						—						—						118,060						32,278						2010						2001						(1)
Two Freedom Square						Office						Reston, VA						—						13,930						77,739						25,510						15,420						101,759						—						—						117,179						53,885						2001						2003						(1)
17Fifty Presidents Street						Office						Reston, VA						—						—						113,362						—						—						113,362						—						—						113,362						3,466						2020						2013						(1)
140 Kendrick Street						Office						Needham, MA						—						18,095						66,905						26,458						19,092						92,366						—						—						111,458						35,918						2000						2004						(1)
Discovery Square						Office						Reston, VA						—						11,198						71,782						20,742						12,533						91,189						—						—						103,722						45,920						2001						2003						(1)
355 Main Street						Office						Cambridge, MA						—						18,863						53,346						27,593						21,173						78,629						—						—						99,802						29,479						1981/1996/2013						2006						(1)
880 & 890 Winter Street						Office						Waltham, MA						—						29,510						65,812						1,367						29,510						66,561						618						—						96,689						5,706						1998-1999						2019						(1)
10 CityPoint						Office						Waltham, MA						—						1,953						85,752						4,744						2,290						90,159						—						—						92,449						14,073						2016						1997						(1)
90 Broadway						Office						Cambridge, MA						—						19,104						52,078						18,077						20,785						68,474						—						—						89,259						24,200						1983/1998/2013						2006						(1)
230 CityPoint						Office						Waltham, MA						—						13,189						49,823						23,958						13,807						73,163						—						—						86,970						32,678						1992						2005						(1)
77 CityPoint						Office						Waltham, MA						—						13,847						60,383						11,937						14,023						72,144						—						—						86,167						29,691						2008						2001						(1)
Waltham Weston Corporate Center						Office						Waltham, MA						—						10,385						60,694						13,151						11,097						73,133						—						—						84,230						38,118						2003						1999						(1)
3625-3635 Peterson Way						Office						Santa Clara, CA						—						63,206						14,879						907						63,206						14,879						907						—						78,992						14,198						1979						2016						(1)
20 CityPoint						Office						Waltham, MA						—						4,887						72,764						—						4,887						72,764						—						—						77,651						3,325						2020						2007						(1)
2440 West El Camino Real						Office						Mountain View, CA						—						16,741						51,285						5,518						16,741						56,803						—						—						73,544						15,215						1987/2003						2011						(1)
191 Spring Street						Office						Lexington, MA						—						2,850						59,751						7,543						3,151						66,993						—						—						70,144						24,275						1971/1995/2018						1997						(1)
300 Binney Street						Office						Cambridge, MA						—						18,080						51,262						140						18,080						51,402						—						—						69,482						12,842						2013						2009						(1)
Wisconsin Place						Office						Chevy Chase, MD						—						—						53,349						14,771						—						68,120						—						—						68,120						28,305						2009						2004						(1)
Reston Corporate Center						Office						Reston, VA						—						9,135						50,857						6,236						10,148						56,080						—						—						66,228						31,405						1984						1998						(1)
200 West Street						Office						Waltham, MA						—						16,148						24,983						21,102						16,813						30,496						317						14,607						62,233						18,585						1999						1997						(1)
255 Main Street						Office						Cambridge, MA						—						134						25,110						34,107						548						58,803						—						—						59,351						37,353						1987						1997						(1)
University Place						Office						Cambridge, MA						1,491						—						37,091						16,745						6,909						46,927						—						—						53,836						30,983						1985						1998						(1)
Sumner Square						Office						Washington, DC						—						624						28,745						20,396						2,251						47,514						—						—						49,765						28,329						1985						1999						(1)
Capital Gallery						Office						Washington, DC						—						4,725						29,565						8,679						8,662						34,307						—						—						42,969						21,150						1981/2006						2007						(1)
North First Business Park						Office						San Jose, CA						—						23,398						13,069						4,580						23,377						17,670						—						—						41,047						16,749						1981						2007						(1)
150 Broadway						Office						Cambridge, MA						—						850						25,042						2,253						1,323						26,822						—						—						28,145						14,154						1999						1997						(1)
105 Broadway						Office						Cambridge, MA						—						1,299						12,943						12,723						2,395						24,570						—						—						26,965						13,041						1990						1997						(1)
Lexington Office Park						Office						Lexington, MA						—						998						1,426						18,567						1,264						19,727						—						—						20,991						15,289						1982						1997						(1)
201 Spring Street						Office						Lexington, MA						—						2,849						15,303						1,124						3,124						16,152						—						—						19,276						8,985						1997						1997						(1)
The Point						Office						Waltham, MA						—						6,395						10,040						421						6,492						10,364						—						—						16,856						1,667						2015						2007						(1)
690 Folsom Street						Office						San Francisco, CA						—						3,219						11,038						1,157						3,219						12,195						—						—						15,414						2,778						2015						2012						(1)
33 Hayden Avenue						Office						Lexington, MA						—						266						3,234						11,566						425						14,641						—						—						15,066						5,674						1979						1997						(1)
92-100 Hayden Avenue						Office						Lexington, MA						—						594						6,748						7,669						802						14,209						—						—						15,011						12,507						1985						1997						(1)
181 Spring Street						Office						Lexington, MA						—						1,066						9,520						2,177						1,160						11,603						—						—						12,763						5,908						1999						1997						(1)
195 West Street						Office						Waltham, MA						—						1,611						6,652						4,221						1,858						10,626						—						—						12,484						8,589						1990						1997						(1)

Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2020 (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
																								7501 Boston Boulevard, Building Seven						Office															Springfield, VA																																																			—						665						9,273						819						791						9,966						—						—						10,757						5,665						1997						1997						(1)
7435 Boston Boulevard, Building One						Office						Springfield, VA						—						392						3,822						5,016						659						8,571						—						—						9,230						6,756						1982						1997						(1)
32 Hartwell Avenue						Office						Lexington, MA						—						168						1,943						6,944						314						8,741						—						—						9,055						2,365						1968/1979/1987						1997						(1)
7450 Boston Boulevard, Building Three						Office						Springfield, VA						—						1,165						4,681						2,591						1,430						7,007						—						—						8,437						4,103						1987						1998						(1)
250 Binney Street						Office						Cambridge, MA						—						110						4,483						3,593						273						7,913						—						—						8,186						6,211						1983						1997						(1)
8000 Grainger Court, Building Five						Office						Springfield, VA						—						366						4,282						3,198						601						7,245						—						—						7,846						5,923						1984						1997						(1)
453 Ravendale Drive						Office						Mountain View, CA						—						5,477						1,090						676						5,477						1,766						—						—						7,243						819						1977						2012						(1)
7300 Boston Boulevard, Building Thirteen						Office						Springfield, VA						—						608						4,773						1,075						661						5,795						—						—						6,456						2,269						2002						1997						(1)
17 Hartwell Avenue						Office						Lexington, MA						—						26						150						6,064						65						6,175						—						—						6,240						2,487						1968						1997						(1)
7601 Boston Boulevard, Building Eight						Office						Springfield, VA						—						200						878						5,035						551						5,562						—						—						6,113						4,838						1986						1997						(1)
7500 Boston Boulevard, Building Six						Office						Springfield, VA						—						138						3,749						1,640						367						5,160						—						—						5,527						4,399						1985						1997						(1)
8000 Corporate Court, Building Eleven						Office						Springfield, VA						—						136						3,071						1,649						774						4,082						—						—						4,856						3,320						1989						1997						(1)
7375 Boston Boulevard, Building Ten						Office						Springfield, VA						—						23						2,685						1,035						93						3,650						—						—						3,743						2,724						1988						1997						(1)
7374 Boston Boulevard, Building Four						Office						Springfield, VA						—						241						1,605						1,821						398						3,269						—						—						3,667						2,870						1984						1997						(1)
7451 Boston Boulevard, Building Two						Office						Springfield, VA						—						249						1,542						1,658						613						2,836						—						—						3,449						2,699						1982						1997						(1)
The Skylyne						Residential						Oakland, CA						—						28,962						239,077						—						28,962						239,077						—						—						268,039						2,128						2020						N/A						(1)
Signature at Reston						Residential						Reston, VA						—						27,076						190,580						659						27,076						191,239						—						—						218,315						13,650						2018						2013						(1)
Proto Kendall Square						Residential						Cambridge, MA						—						9,243						127,248						3,336						9,245						130,582						—						—						139,827						7,883						2018						2015						(1)
The Avant at Reston Town Center						Residential						Reston, VA						—						20,350						91,995						846						20,350						92,841						—						—						113,191						17,204						2014						2010						(1)
The Lofts at Atlantic Wharf						Residential						Boston, MA						—						3,529						54,891						2,129						3,529						57,020						—						—						60,549						14,166						2011						2007						(1)
Boston Marriott Cambridge						Hotel						Cambridge, MA						—						478						37,918						35,486						1,201						72,681						—						—						73,882						49,103						1986/2017						1997						(1)
Kendall Center Green Garage						Garage						Cambridge, MA						—						—						35,035						6,846						103						41,778						—						—						41,881						14,442						1984						2006						(1)
Kendall Center Yellow Garage						Garage						Cambridge, MA						—						1,256						15,697						1,552						1,434						17,071						—						—						18,505						6,485						2006						2004						(1)
Kendall Center Blue Garage						Garage						Cambridge, MA						—						1,163						11,633						2,111						1,579						13,328						—						—						14,907						10,044						1990						1997						(1)
Reston Next (formerly Reston Gateway)						Development						Reston, VA						—						—						—						354,174						—						—						—						354,174						354,174						—						N/A						1998						N/A
2100 Pennsylvania Avenue						Development						Washington, DC						—						—						—						294,445						185,129						—						—						109,316						294,445						3,481						N/A						N/A						N/A
325 Main Street						Development						Cambridge, MA						—						174						—						161,468						965						—						—						160,677						161,642						—						N/A						1997						N/A
777 Harrison Street (formerly 425 Fourth Street)						Land						San Francisco, CA						—						144,647						—						25,930						—						47						170,530						—						170,577						—						N/A						2020						N/A
North First Master Plan						Land						San Jose, CA						—						35,004						—						3,937						—						—						38,941						—						38,941						—						N/A						2007						N/A

Boston Properties, Inc. Schedule 3—Real Estate and Accumulated Depreciation December 31, 2020 (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
																								Plaza at Almaden						Land															San Jose, CA																																																			—						—						—						36,431						—						—						36,431						—						36,431						—						N/A						2006						N/A
Back Bay Station Master Plan						Land						Boston, MA						—						—						—						30,643						—						—						30,643						—						30,643						—						N/A						N/A						N/A
Reston Gateway Master Plan						Land						Reston, VA						—						—						—						28,610						—						—						28,610						—						28,610						—						N/A						1998						N/A
Springfield Metro Center						Land						Springfield, VA						—						—						—						19,871						—						—						19,871						—						19,871						—						N/A						2007						N/A
214 Third Avenue						Land						Waltham, MA						—						—						—						19,206						—						—						19,206						—						19,206						—						N/A						2006						N/A
CityPoint South Master Plan						Land						Waltham, MA						—						—						—						13,363						—						—						13,363						—						13,363						—						N/A						N/A						N/A
103 Fourth Avenue						Land						Waltham, MA						—						—						—						12,888						—						—						12,888						—						12,888						—						N/A						2007						N/A
Broad Run Business Park						Land						Loudoun County, VA						—						—						—						2,392						—						—						2,392						—						2,392						—						N/A						1998						N/A
Kendall Center Master Plan						Land						Cambridge, MA						—						—						—						2,145						—						—						2,145						—						2,145						—						N/A						1997						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						—						—						—						42						—						—						42						—						42						—						N/A						2000						N/A
																		$	2,909,081		(2)			$	5,160,116					$	13,196,160					$	4,947,027					$	5,429,703		(3)			$	16,553,873		(4)			$	450,954		(5)			$	868,773					$	23,303,303					$	5,501,637

Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $49,606. Accumulated Depreciation does not include approximately $32,465 of accumulated depreciation related to Furniture, Fixtures and Equipment.

The aggregate cost and accumulated depreciation for tax purposes was approximately $20.7 billion and $4.5 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 $(22.9) million.

(3)Includes Right of Use Assets - Finance Leases and Right of Use Assets - Operating Leases of approximately $214,091 and $146,406, respectively.

(4)Includes Right of Use Assets - Finance Leases of approximately $23,302.

(5)Includes pre-development costs.

Boston Properties, Inc.

Real Estate and Accumulated Depreciation

December 31, 2020, 2019 and 2018

(dollars in thousands)

A summary of activity for real estate and accumulated depreciation is as follows:

						2020						2019						2018
Real Estate:
Balance at the beginning of the year						$	22,844,697					$	21,605,545					$	21,058,714
Additions to/improvements of real estate						996,989						1,671,898						1,043,379
Assets sold/written-off						(538,383)						(432,746)						(496,548)
Balance at the end of the year						$	23,303,303					$	22,844,697					$	21,605,545
Accumulated Depreciation:
Balance at the beginning of the year						$	5,239,179					$	4,871,102					$	4,566,570
Depreciation expense						573,898						564,938						533,342
Assets sold/written-off						(311,440)						(196,861)						(228,810)
Balance at the end of the year						$	5,501,637					$	5,239,179					$	4,871,102

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, 2020 (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 (Years)
Property Name						Type						Location						Encumbrances						Land						Building
767 Fifth Avenue (the General Motors Building)						Office						New York, NY						$	2,277,522					$	1,796,252					$	1,532,654					$	227,450					$	1,796,252					$	1,760,104					$	—					$	—					$	3,556,356					$	364,145					1968/2019						2013						(1)
Prudential Center						Office						Boston, MA						—						92,077						948,357						512,816						100,540						1,435,029						17,681						—						1,553,250						617,331						1965/1993/2002/2016-2017						1998/1999/2000						(1)
Embarcadero Center						Office						San Francisco, CA						—						179,697						847,410						407,480						180,420						1,254,167						—						—						1,434,587						662,756						1970/1989						1998-1999						(1)
399 Park Avenue						Office						New York, NY						—						339,200						700,358						281,352						339,200						981,710						—						—						1,320,910						370,361						1961/2018						2002						(1)
Salesforce Tower						Office						San Francisco, CA						—						200,349						946,205						5,355						200,349						951,560						—						—						1,151,909						68,918						2018						2013						(1)
601 Lexington Avenue						Office						New York, NY						630,068						241,600						494,782						409,864						279,281						636,966						—						229,999						1,146,246						274,343						1977/1997						2001						(1)
200 Clarendon Street and Garage						Office						Boston, MA						—						219,543						667,884						218,821						251,374						854,874						—						—						1,106,248						244,882						1976						2010						(1)
250 West 55th Street						Office						New York, NY						—						285,263						603,167						51,860						285,263						655,027						—						—						940,290						138,004						2014						2007						(1)
100 Federal Street						Office						Boston, MA						—						131,067						435,954						111,196						131,067						547,150						—						—						678,217						141,629						1971-1975/2017						2012						(1)
Times Square Tower						Office						New York, NY						—						165,413						380,438						70,227						159,694						456,384						—						—						616,078						207,106						2004						2000						(1)
Carnegie Center						Office						Princeton, NJ						—						142,666						316,856						138,834						90,498						452,738						55,120						—						598,356						217,092						1983-2016						1998/1999/2000/2007/2014/2017/2019						(1)
Atlantic Wharf						Office						Boston, MA						—						63,988						454,537						18,538						63,988						473,075						—						—						537,063						146,860						2011						2007						(1)
510 Madison Avenue						Office						New York, NY						—						103,000						253,665						28,446						103,000						282,111						—						—						385,111						81,517						2012						2010						(1)
Fountain Square						Office						Reston, VA						—						56,853						306,298						21,030						56,853						327,328						—						—						384,181						90,047						1986-1990						2012						(1)
599 Lexington Avenue						Office						New York, NY						—						81,040						100,507						187,033						81,040						287,540						—						—						368,580						185,354						1986						1997						(1)
680 Folsom Street						Office						San Francisco, CA						—						72,545						219,766						7,917						72,545						227,683						—						—						300,228						55,319						2014						2012						(1)
145 Broadway						Office						Cambridge, MA						—						121						273,013						25,509						23,164						275,479						—						—						298,643						9,941						2019						1997						(1)
2200 Pennsylvania Avenue						Office						Washington, DC						—						—						183,541						112,436						107,356						188,621						—						—						295,977						66,072						2011						2008						(1)
South of Market and Democracy Tower						Office						Reston, VA						—						13,603						237,479						40,827						13,603						278,306						—						—						291,909						107,279						2008-2009						2003						(1)
601 Massachusetts Avenue						Office						Washington, DC						—						95,310						165,173						3,933						95,310						169,106						—						—						264,416						30,743						2016						2008						(1)
Bay Colony Corporate Center						Office						Waltham, MA						—						18,789						148,451						81,302						18,789						229,753						—						—						248,542						89,232						1985-1989						2011						(1)
535 Mission Street						Office						San Francisco, CA						—						40,933						148,378						3,287						40,933						151,665						—						—						192,598						31,953						2015						2013						(1)
Mountain View Research Park						Office						Mountain View, CA						—						95,066						68,373						18,479						95,066						86,852						—						—						181,918						21,725						1977-1981/2007-2013						2013						(1)
Reservoir Place						Office						Waltham, MA						—						18,605						104,124						53,079						19,089						156,719						—						—						175,808						75,841						1955/1987/2017						1997/1998						(1)
1330 Connecticut Avenue						Office						Washington, DC						—						25,982						82,311						32,436						25,982						114,747						—						—						140,729						36,695						1984/2018						2004						(1)
Kingstowne Towne Center						Office						Alexandria, VA						—						18,021						109,038						3,135						18,021						112,173						—						—						130,194						46,430						2003-2006						2007						(1)
One Freedom Square						Office						Reston, VA						—						9,929						84,504						34,247						9,883						118,797						—						—						128,680						61,215						2000						2003						(1)
One and Two Reston Overlook						Office						Reston, VA						—						16,456						66,192						42,344						15,074						109,918						—						—						124,992						56,191						1999						2000						(1)
Weston Corporate Center						Office						Weston, MA						—						25,753						92,312						(5)						25,854						92,206						—						—						118,060						32,278						2010						2001						(1)
17Fifty Presidents Street						Office						Reston, VA						—						—						113,362						—						—						113,362						—						—						113,362						3,466						2020						2013						(1)
Two Freedom Square						Office						Reston, VA						—						13,930						77,739						19,298						13,866						97,101						—						—						110,967						52,128						2001						2003						(1)
140 Kendrick Street						Office						Needham, MA						—						18,095						66,905						22,468						18,095						89,373						—						—						107,468						34,790						2000						2004						(1)

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2020 (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 (Years)
Property Name						Type						Location						Encumbrances						Land						Building
355 Main Street						Office						Cambridge, MA						—						18,863						53,346						27,295						21,098						78,406						—						—						99,504						29,397						1981/1996/2013						2006						(1)
Discovery Square						Office						Reston, VA						—						11,198						71,782						15,197						11,146						87,031						—						—						98,177						44,352						2001						2003						(1)
880 & 890 Winter Street						Office						Waltham, MA						—						29,510						65,812						1,367						29,510						66,561						618						—						96,689						5,706						1998-1999						2019						(1)
10 CityPoint						Office						Waltham, MA						—						1,953						85,752						4,581						2,127						90,159						—						—						92,286						14,073						2016						1997						(1)
90 Broadway						Office						Cambridge, MA						—						19,104						52,078						17,898						20,741						68,339						—						—						89,080						24,156						1983/1998/2013						2006						(1)
77 CityPoint						Office						Waltham, MA						—						13,847						60,383						11,832						13,997						72,065						—						—						86,062						29,665						2008						2001						(1)
230 CityPoint						Office						Waltham, MA						—						13,189						49,823						22,341						13,403						71,950						—						—						85,353						32,224						1992						2005						(1)
Waltham Weston Corporate Center						Office						Waltham, MA						—						10,385						60,694						10,164						10,350						70,893						—						—						81,243						37,273						2003						1999						(1)
3625-3635 Peterson Way						Office						Santa Clara, CA						—						63,206						14,879						907						63,206						14,879						907						—						78,992						14,198						1979						2016						(1)
20 CityPoint						Office						Waltham, MA						—						4,887						72,764						—						4,887						72,764						—						—						77,651						3,325						2020						2007						(1)
2440 West El Camino Real						Office						Mountain View, CA						—						16,741						51,285						5,518						16,741						56,803						—						—						73,544						15,215						1987/2003						2011						(1)
191 Spring Street						Office						Lexington, MA						—						2,850						59,751						6,911						2,850						66,662						—						—						69,512						24,150						1971/1995/2018						1997						(1)
300 Binney Street						Office						Cambridge, MA						—						18,080						51,262						140						18,080						51,402						—						—						69,482						12,842						2013						2009						(1)
Wisconsin Place						Office						Chevy Chase, MD						—						—						53,349						14,771						—						68,120						—						—						68,120						28,305						2009						2004						(1)
Reston Corporate Center						Office						Reston, VA						—						9,135						50,857						3,625						9,496						54,121						—						—						63,617						30,666						1984						1998						(1)
200 West Street						Office						Waltham, MA						—						16,148						24,983						18,441						16,148						28,500						317						14,607						59,572						17,832						1999						1997						(1)
255 Main Street						Office						Cambridge, MA						—						134						25,110						32,451						134						57,561						—						—						57,695						36,887						1987						1997						(1)
University Place						Office						Cambridge, MA						1,491						—						37,091						15,295						6,546						45,840						—						—						52,386						30,577						1985						1998						(1)
Sumner Square						Office						Washington, DC						—						624						28,745						18,316						1,731						45,954						—						—						47,685						27,744						1985						1999						(1)
North First Business Park						Office						San Jose, CA						—						23,398						13,069						4,557						23,371						17,653						—						—						41,024						16,743						1981						2007						(1)
Capital Gallery						Office						Washington, DC						—						4,725						29,565						4,016						6,128						32,178						—						—						38,306						20,348						1981/2006						2007						(1)
150 Broadway						Office						Cambridge, MA						—						850						25,042						248						822						25,318						—						—						26,140						13,584						1999						1997						(1)
105 Broadway						Office						Cambridge, MA						—						1,299						12,943						10,617						1,868						22,991						—						—						24,859						12,445						1990						1997						(1)
Lexington Office Park						Office						Lexington, MA						—						998						1,426						17,803						1,073						19,154						—						—						20,227						15,076						1982						1997						(1)
201 Spring Street						Office						Lexington, MA						—						2,849						15,303						25						2,849						15,328						—						—						18,177						8,672						1997						1997						(1)
The Point						Office						Waltham, MA						—						6,395						10,040						421						6,492						10,364						—						—						16,856						1,667						2015						2007						(1)
690 Folsom Street						Office						San Francisco, CA						—						3,219						11,038						1,157						3,219						12,195						—						—						15,414						2,778						2015						2012						(1)
33 Hayden Avenue						Office						Lexington, MA						—						266						3,234						10,929						266						14,163						—						—						14,429						5,494						1979						1997						(1)
92-100 Hayden Avenue						Office						Lexington, MA						—						594						6,748						6,940						619						13,663						—						—						14,282						12,300						1985						1997						(1)
181 Spring Street						Office						Lexington, MA						—						1,066						9,520						1,800						1,066						11,320						—						—						12,386						5,802						1999						1997						(1)
195 West Street						Office						Waltham, MA						—						1,611						6,652						3,232						1,611						9,884						—						—						11,495						8,306						1990						1997						(1)
7501 Boston Boulevard, Building Seven						Office						Springfield, VA						—						665						9,273						314						665						9,587						—						—						10,252						5,520						1997						1997						(1)
7435 Boston Boulevard, Building One						Office						Springfield, VA						—						392						3,822						4,323						486						8,051						—						—						8,537						6,561						1982						1997						(1)
32 Hartwell Avenue						Office						Lexington, MA						—						168						1,943						6,358						168						8,301						—						—						8,469						2,199						1968/1979/1987						1997						(1)
7450 Boston Boulevard, Building Three						Office						Springfield, VA						—						1,165						4,681						2,177						1,327						6,696						—						—						8,023						3,983						1987						1998						(1)

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2020 (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 (Years)
Property Name						Type						Location						Encumbrances						Land						Building
250 Binney Street						Office						Cambridge, MA						—						110						4,483						2,939						110						7,422						—						—						7,532						6,030						1983						1997						(1)
8000 Grainger Court, Building Five						Office						Springfield, VA						—						366						4,282						2,604						453						6,799						—						—						7,252						5,756						1984						1997						(1)
453 Ravendale Drive						Office						Mountain View, CA						—						5,477						1,090						676						5,477						1,766						—						—						7,243						819						1977						2012						(1)
7300 Boston Boulevard, Building Thirteen						Office						Springfield, VA						—						608						4,773						863						608						5,636						—						—						6,244						2,209						2002						1997						(1)
17 Hartwell Avenue						Office						Lexington, MA						—						26						150						5,907						26						6,057						—						—						6,083						2,442						1968						1997						(1)
7601 Boston Boulevard, Building Eight						Office						Springfield, VA						—						200						878						4,342						378						5,042						—						—						5,420						4,643						1986						1997						(1)
7500 Boston Boulevard, Building Six						Office						Springfield, VA						—						138						3,749						1,107						234						4,760						—						—						4,994						4,249						1985						1997						(1)
8000 Corporate Court, Building Eleven						Office						Springfield, VA						—						136						3,071						1,298						686						3,819						—						—						4,505						3,217						1989						1997						(1)
7375 Boston Boulevard, Building Ten						Office						Springfield, VA						—						23						2,685						854						47						3,515						—						—						3,562						2,676						1988						1997						(1)
7374 Boston Boulevard, Building Four						Office						Springfield, VA						—						241						1,605						1,438						303						2,981						—						—						3,284						2,765						1984						1997						(1)
7451 Boston Boulevard, Building Two						Office						Springfield, VA						—						249						1,542						1,345						535						2,601						—						—						3,136						2,609						1982						1997						(1)
The Skylyne						Residential						Oakland, CA						—						28,962						239,077						—						28,962						239,077						—						—						268,039						2,128						2020						N/A						(1)
Signature at Reston						Residential						Reston, VA						—						27,076						190,580						659						27,076						191,239						—						—						218,315						13,650						2018						2013						(1)
Proto Kendall Square						Residential						Cambridge, MA						—						9,243						127,248						3,336						9,245						130,582						—						—						139,827						7,883						2018						2015						(1)
The Avant at Reston Town Center						Residential						Reston, VA						—						20,350						91,995						846						20,350						92,841						—						—						113,191						17,204						2014						2010						(1)
The Lofts at Atlantic Wharf						Residential						Boston, MA						—						3,529						54,891						2,129						3,529						57,020						—						—						60,549						14,166						2011						2007						(1)
Boston Marriott Cambridge						Hotel						Cambridge, MA						—						478						37,918						32,595						478						70,513						—						—						70,991						48,286						1986/2017						1997						(1)
Kendall Center Green Garage						Garage						Cambridge, MA						—						—						35,035						6,432						—						41,467						—						—						41,467						14,327						1984						2006						(1)
Kendall Center Yellow Garage						Garage						Cambridge, MA						—						1,256						15,697						840						1,256						16,537						—						—						17,793						6,287						2006						2004						(1)
Kendall Center Blue Garage						Garage						Cambridge, MA						—						1,163						11,633						446						1,163						12,079						—						—						13,242						9,576						1990						1997						(1)
Reston Next (formerly Reston Gateway)						Development						Reston, VA						—						—						—						354,174						—						—						—						354,174						354,174						—						N/A						1998						N/A
2100 Pennsylvania Avenue						Development						Washington, DC						—						—						—						294,445						185,129						—						—						109,316						294,445						3,481						N/A						N/A						N/A
325 Main Street						Development						Cambridge, MA						—						174						—						161,275						772						—						—						160,677						161,449						—						N/A						1997						N/A
777 Harrison Street (formerly 425 Fourth Street)						Land						San Francisco, CA						—						144,647						—						25,930						—						47						170,530						—						170,577						—						N/A						2020						N/A
North First Master Plan						Land						San Jose, CA						—						35,004						—						3,937						—						—						38,941						—						38,941						—						N/A						2007						N/A
Plaza at Almaden						Land						San Jose, CA						—						—						—						36,431						—						—						36,431						—						36,431						—						N/A						2006						N/A
Back Bay Station Master Plan						Land						Boston, MA						—						—						—						30,643						—						—						30,643						—						30,643						—						N/A						N/A						N/A
Reston Gateway Master Plan						Land						Reston, VA						—						—						—						28,610						—						—						28,610						—						28,610						—						N/A						1998						N/A
Springfield Metro Center						Land						Springfield, VA						—						—						—						19,871						—						—						19,871						—						19,871						—						N/A						2007						N/A
214 Third Avenue						Land						Waltham, MA						—						—						—						19,206						—						—						19,206						—						19,206						—						N/A						2006						N/A

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2020 (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 (Years)
Property Name						Type						Location						Encumbrances						Land						Building
CityPoint South Master Plan						Land						Waltham, MA						—						—						—						13,363						—						—						13,363						—						13,363						—						N/A						N/A						N/A
103 Fourth Avenue						Land						Waltham, MA						—						—						—						12,888						—						—						12,888						—						12,888						—						N/A						2007						N/A
Broad Run Business Park						Land						Loudoun County, VA						—						—						—						2,392						—						—						2,392						—						2,392						—						N/A						1998						N/A
Kendall Center Master Plan						Land						Cambridge, MA						—						—						—						2,145						—						—						2,145						—						2,145						—						N/A						1997						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						—						—						—						42						—						—						42						—						42						—						N/A						2000						N/A
																		$	2,909,081		(2)			$	5,160,116					$	13,196,160					$	4,570,218					$	5,332,487		(3)			$	16,274,280		(4)			$	450,954		(5)			$	868,773					$	22,926,494					$	5,396,111

Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $49,606. Accumulated Depreciation does not include approximately $32,465 of accumulated depreciation related to Furniture, Fixtures and Equipment.

The aggregate cost and accumulated depreciation for tax purposes was approximately $23.0 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 $(22.9) million.

(3)Includes Right of Use Assets - Finance Leases and Right of Use Assets - Operating Leases of approximately $214,091 and $148,640, respectively.

(4)Includes Right of Use Assets - Finance Leases of approximately $23,302.

(5)Includes pre-development costs.

Boston Properties Limited Partnership

Real Estate and Accumulated Depreciation

December 31, 2020, 2019 and 2018

(dollars in thousands)

A summary of activity for real estate and accumulated depreciation is as follows:

						2020						2019						2018
Real Estate:
Balance at the beginning of the year						$	22,449,476					$	21,207,189					$	20,647,236
Additions to/improvements of real estate						996,989						1,671,898						1,043,379
Assets sold/written-off						(519,971)						(429,611)						(483,426)
Balance at the end of the year						$	22,926,494					$	22,449,476					$	21,207,189
Accumulated Depreciation:
Balance at the beginning of the year						$	5,135,289					$	4,773,800					$	4,473,895
Depreciation expense						566,813						557,130						525,584
Assets sold/written-off						(305,991)						(195,641)						(225,679)
Balance at the end of the year						$	5,396,111					$	5,135,289					$	4,773,800

Note: Real Estate and Accumulated Depreciation amounts do not include Furniture, Fixtures and Equipment.

X

- References

No definition available.

+ Details

Name:	srt_RealEstateAndAccumulatedDepreciationDisclosureAbstract
Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The entire disclosure of real estate investments and associated accumulated depreciation for entities with a significant portion of their business acquiring and holding investment real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 970
-SubTopic 360
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-28)
-URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024

+ Details

Name:	srt_RealEstateAndAccumulatedDepreciationDisclosureTextBlock
Namespace Prefix:	srt_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration