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

12 Months Ended

Dec. 31, 2022

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, 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 (Years)
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 (Years)
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 (Years)
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.