Real Estate and Accumulated Depreciation Real Estate and Accumulated Depreciation (Tables)

12 Months Ended

Dec. 31, 2018

SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]

Real Estate and Accumulated Depreciation, By Property [Table Text Block]

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2018 (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	$	2,270,534	$	1,796,252	$	1,532,654	$	189,657	$	1,796,252	$	1,722,311	$	—	$	—	$	3,518,563	$	271,534	1968	2013	(1)
Prudential Center	Office	Boston, MA	—		92,077		948,357		532,802		115,638		1,457,494		104		—		1,573,236		550,109		1965/1993/2002/2016-2017	1998/1999/2000	(1)
Embarcadero Center	Office	San Francisco, CA	—		179,697		847,410		368,967		195,987		1,200,087		—		—		1,396,074		612,981		1970/1989	1998-1999	(1)
399 Park Avenue	Office	New York, NY	—		339,200		700,358		247,092		354,107		932,543		—		—		1,286,650		332,911		1961/2018	2002	(1)
Salesforce Tower	Office	San Francisco, CA	—		200,349		919,565		—		200,349		919,565		—		—		1,119,914		9,509		2018	2013	(1)
601 Lexington Avenue	Office	New York, NY	658,792		241,600		494,782		361,985		289,639		637,044		—		171,684		1,098,367		272,936		1977/1997	2001	(1)
200 Clarendon Street and Garage	Office	Boston, MA	—		219,543		667,884		164,073		219,616		822,218		9,666		—		1,051,500		192,137		1976	2010	(1)
250 West 55th Street	Office	New York, NY	—		285,263		603,167		48,642		285,263		651,809		—		—		937,072		94,434		2014	2007	(1)
100 Federal Street	Office	Boston, MA	—		131,067		435,954		99,702		131,067		535,656		—		—		666,723		105,536		1971-1975/2017	2012	(1)
Carnegie Center	Office	Princeton, NJ	—		107,997		389,359		158,752		108,948		543,974		3,186		—		656,108		241,570		1983-2016	1998/1999/2000/2007/2014/2017	(1)
Times Square Tower	Office	New York, NY	—		165,413		380,438		94,451		169,193		471,109		—		—		640,302		206,067		2004	2000	(1)
Atlantic Wharf	Office	Boston, MA	—		63,988		454,537		17,184		63,988		471,721		—		—		535,709		116,238		2011	2007	(1)
510 Madison Avenue	Office	New York, NY	—		103,000		253,665		24,992		103,000		278,657		—		—		381,657		62,507		2012	2010	(1)
Fountain Square	Office	Reston, VA	—		56,853		306,298		3,170		56,853		309,468		—		—		366,321		68,390		1986-1990	2012	(1)
599 Lexington Avenue	Office	New York, NY	—		81,040		100,507		174,213		87,852		267,908		—		—		355,760		170,678		1986	1997	(1)
680 Folsom Street	Office	San Francisco, CA	—		72,545		219,766		7,829		72,545		227,595		—		—		300,140		38,230		2014	2012	(1)
601 Massachusetts Avenue	Office	Washington, DC	—		95,310		165,173		3,900		95,322		169,061		—		—		264,383		18,263		2016	2008	(1)
South of Market and Democracy Tower	Office	Reston, VA	—		13,603		237,479		12,428		13,687		249,823		—		—		263,510		91,072		2008-2009	2003	(1)
Bay Colony Corporate Center	Office	Waltham, MA	—		18,789		148,451		77,133		18,789		225,584		—		—		244,373		68,903		1985-1989	2011	(1)
Gateway Center	Office	San Francisco, CA	—		28,255		139,245		64,831		30,627		201,704		—		—		232,331		107,640		1984/1986/2002	1999	(1)
535 Mission Street	Office	San Francisco, CA	—		40,933		148,378		3,259		40,933		151,637		—		—		192,570		20,576		2015	2013	(1)
2200 Pennsylvania Avenue	Office	Washington, DC	—		—		183,541		4,535		—		188,076		—		—		188,076		52,280		2011	2008	(1)
Mountain View Research Park	Office	Mountain View, CA	—		95,066		68,373		9,988		95,066		78,361		—		—		173,427		17,866		1977-1981/2007-2013	2013	(1)
Reservoir Place	Office	Waltham, MA	—		18,605		104,124		45,144		20,108		147,765		—		—		167,873		64,683		1955/1987/2017	1997/1998	(1)
1330 Connecticut Avenue	Office	Washington, DC	—		25,982		82,311		36,089		27,135		117,247		—		—		144,382		27,535		1984/2018	2004	(1)
Kingstowne Towne Center	Office	Alexandria, VA	—		18,021		109,038		2,098		18,062		111,095		—		—		129,157		41,469		2003-2006	2007	(1)

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2018 (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 Freedom Square	Office	Reston, VA	—	9,929	84,504	32,256		11,293	115,396	—	—	126,689	54,652	2000	2003	(1)
Capital Gallery	Office	Washington, DC	—	4,725	29,565	87,231		8,662	112,859	—	—	121,521	67,759	1981/2006	2007	(1)
Weston Corporate Center	Office	Weston, MA	—	25,753	92,312	(123	)	25,854	92,088	—	—	117,942	26,176	2010	2001	(1)
Two Freedom Square	Office	Reston, VA	—	13,930	77,739	23,427		15,420	99,676	—	—	115,096	51,291	2001	2003	(1)
One and Two Reston Overlook	Office	Reston, VA	—	16,456	66,192	24,181		16,179	90,650	—	—	106,829	47,668	1999	2000	(1)
140 Kendrick Street	Office	Needham, MA	—	18,095	66,905	17,553		19,092	83,461	—	—	102,553	32,360	2000	2004	(1)
Discovery Square	Office	Reston, VA	—	11,198	71,782	17,753		12,533	88,200	—	—	100,733	39,574	2001	2003	(1)
355 Main Street	Office	Cambridge, MA	—	18,863	53,346	23,701		21,173	74,737	—	—	95,910	23,691	1981/1996/2013	2006	(1)
10 CityPoint	Office	Waltham, MA	—	1,953	85,752	4,515		2,116	90,104	—	—	92,220	7,772	2016	1997	(1)
90 Broadway	Office	Cambridge, MA	—	19,104	52,078	18,363		20,785	68,760	—	—	89,545	21,302	1983/1998/2013	2006	(1)
230 CityPoint	Office	Waltham, MA	—	13,189	49,823	21,914		13,593	71,333	—	—	84,926	26,357	1992	2005	(1)
Waltham Weston Corporate Center	Office	Waltham, MA	—	10,385	60,694	11,449		11,097	71,431	—	—	82,528	32,739	2003	1999	(1)
77 CityPoint	Office	Waltham, MA	—	13,847	60,383	5,858		13,873	66,215	—	—	80,088	25,107	2008	2001	(1)
3625-3635 Peterson Way	Office	Santa Clara, CA	—	63,206	14,879	673		63,206	14,879	673	—	78,758	8,146	1979	2016	(1)
2440 West El Camino Real	Office	Mountain View, CA	—	16,741	51,285	3,411		16,741	54,696	—	—	71,437	12,562	1987/2003	2011	(1)
300 Binney Street	Office	Cambridge, MA	—	18,080	51,262	140		18,080	51,402	—	—	69,482	9,450	2013	2009	(1)
191 Spring Street	Office	Lexington, MA	—	2,850	59,751	6,235		3,151	65,685	—	—	68,836	19,543	1971/1995/2018	1997	(1)
Wisconsin Place	Office	Chevy Chase, MD	—	—	53,349	14,889		—	68,238	—	—	68,238	22,936	2009	2004	(1)
Reston Corporate Center	Office	Reston, VA	—	9,135	50,857	6,236		10,148	56,080	—	—	66,228	28,315	1984	1998	(1)
New Dominion Technology Park, Bldg. Two	Office	Herndon, VA	—	5,584	51,868	4,157		6,510	55,099	—	—	61,609	25,421	2004	1998	(1)
255 Main Street	Office	Cambridge, MA	—	134	25,110	29,672		548	54,368	—	—	54,916	30,180	1987	1997	(1)
200 West Street	Office	Waltham, MA	—	16,148	24,983	11,120		16,813	35,438	—	—	52,251	22,544	1999	1997	(1)
New Dominion Technology Park, Bldg. One	Office	Herndon, VA	29,675	3,880	43,227	3,927		4,583	46,451	—	—	51,034	27,542	2001	1998	(1)
Sumner Square	Office	Washington, DC	—	624	28,745	19,054		1,478	46,945	—	—	48,423	25,384	1985	1999	(1)
University Place	Office	Cambridge, MA	5,571	—	37,091	9,001		390	45,702	—	—	46,092	27,871	1985	1998	(1)
2600 Tower Oaks Boulevard	Office	Rockville, MD	—	4,243	31,125	6,517		4,244	37,641	—	—	41,885	21,426	2001	1998	(1)
North First Business Park	Office	San Jose, CA	—	23,398	13,069	4,613		23,377	17,703	—	—	41,080	16,076	1981	2007	(1)
150 Broadway	Office	Cambridge, MA	—	850	25,042	8,540		1,323	33,109	—	—	34,432	18,404	1999	1997	(1)
325 Main Street	Office	Cambridge, MA	—	174	12,200	16,437		965	23,319	4,527	—	28,811	13,676	1987/2013	1997	(1)
105 Broadway	Office	Cambridge, MA	—	1,299	12,943	9,401		2,395	21,248	—	—	23,643	13,950	1990	1997	(1)
Lexington Office Park	Office	Lexington, MA	—	998	1,426	18,700		1,264	19,860	—	—	21,124	13,614	1982	1997	(1)
201 Spring Street	Office	Lexington, MA	—	2,849	15,303	1,390		3,124	16,418	—	—	19,542	8,344	1997	1997	(1)
The Point	Office	Waltham, MA	—	6,395	10,040	431		6,480	10,386	—	—	16,866	1,031	2015	2007	(1)
690 Folsom Street	Office	San Francisco, CA	—	3,219	11,038	1,157		3,219	12,195	—	—	15,414	1,790	2015	2012	(1)
92-100 Hayden Avenue	Office	Lexington, MA	—	594	6,748	7,255		802	13,795	—	—	14,597	11,809	1985	1997	(1)

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2018 (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
181 Spring Street	Office	Lexington, MA	—	1,066	9,520	2,230	1,160	11,656	—	—	12,816	5,424	1999	1997	(1)
195 West Street	Office	Waltham, MA	—	1,611	6,652	4,270	1,858	10,675	—	—	12,533	8,330	1990	1997	(1)
33 Hayden Avenue	Office	Lexington, MA	—	266	3,234	8,223	425	11,298	—	—	11,723	9,033	1979	1997	(1)
7501 Boston Boulevard, Building Seven	Office	Springfield, VA	—	665	9,273	819	791	9,966	—	—	10,757	5,121	1997	1997	(1)
7450 Boston Boulevard, Building Three	Office	Springfield, VA	—	1,165	4,681	3,278	1,430	7,694	—	—	9,124	3,733	1987	1998	(1)
7435 Boston Boulevard, Building One	Office	Springfield, VA	—	392	3,822	4,737	659	8,292	—	—	8,951	5,917	1982	1997	(1)
250 Binney Street	Office	Cambridge, MA	—	110	4,483	3,593	273	7,913	—	—	8,186	5,448	1983	1997	(1)
8000 Grainger Court, Building Five	Office	Springfield, VA	—	366	4,282	3,536	601	7,583	—	—	8,184	5,864	1984	1997	(1)
453 Ravendale Drive	Office	Mountain View, CA	—	5,477	1,090	676	5,477	1,766	—	—	7,243	558	1977	2012	(1)
7300 Boston Boulevard, Building Thirteen	Office	Springfield, VA	—	608	4,773	1,438	661	6,158	—	—	6,819	3,011	2002	1997	(1)
7601 Boston Boulevard, Building Eight	Office	Springfield, VA	—	200	878	5,373	551	5,900	—	—	6,451	4,487	1986	1997	(1)
17 Hartwell Avenue	Office	Lexington, MA	—	26	150	6,064	65	6,175	—	—	6,240	1,445	1968	1997	(1)
7500 Boston Boulevard, Building Six	Office	Springfield, VA	—	138	3,749	1,673	406	5,154	—	—	5,560	4,121	1985	1997	(1)
8000 Corporate Court, Building Eleven	Office	Springfield, VA	—	136	3,071	1,596	774	4,029	—	—	4,803	3,051	1989	1997	(1)
7375 Boston Boulevard, Building Ten	Office	Springfield, VA	—	23	2,685	992	93	3,607	—	—	3,700	2,593	1988	1997	(1)
7374 Boston Boulevard, Building Four	Office	Springfield, VA	—	241	1,605	1,828	398	3,276	—	—	3,674	2,685	1984	1997	(1)
7451 Boston Boulevard, Building Two	Office	Springfield, VA	—	249	1,542	1,659	613	2,837	—	—	3,450	2,527	1982	1997	(1)
32 Hartwell Avenue	Office	Lexington, MA	—	168	1,943	817	314	2,614	—	—	2,928	1,821	1968/1979/1987	1997	(1)
164 Lexington Road	Office	Billerica, MA	—	592	1,370	319	643	1,638	—	—	2,281	906	1982	1997	(1)
Signature at Reston	Residential	Reston, VA	—	27,076	190,580	—	27,076	190,580	—	—	217,656	3,938	2018	2013	(1)
Proto Kendall Square	Residential	Cambridge, MA	—	9,243	127,248	—	9,243	127,248	—	—	136,491	1,324	2018	2015	(1)
The Avant at Reston Town Center	Residential	Reston, VA	—	20,350	91,995	830	20,350	92,825	—	—	113,175	12,254	2014	2010	(1)
The Lofts at Atlantic Wharf	Residential	Boston, MA	—	3,529	54,891	1,768	3,529	56,659	—	—	60,188	11,131	2011	2007	(1)
Boston Marriott Cambridge	Hotel	Cambridge, MA	—	478	37,918	36,697	1,201	73,892	—	—	75,093	46,576	1986/2017	1997	(1)
Kendall Center Green Garage	Garage	Cambridge, MA	—	—	35,035	7,448	103	42,380	—	—	42,483	12,208	1984	2006	(1)
Kendall Center Yellow Garage	Garage	Cambridge, MA	—	1,256	15,697	1,621	1,434	17,140	—	—	18,574	5,643	2006	2004	(1)
Kendall Center Blue Garage	Garage	Cambridge, MA	—	1,163	11,633	2,145	1,579	13,362	—	—	14,941	9,437	1990	1997	(1)
145 Broadway	Development	Cambridge, MA	—	121	—	223,845	324	—	—	223,642	223,966	—	N/A	1997	N/A
MacArthur Station Residences	Development	Oakland, CA	—	—	—	87,159	—	—	—	87,159	87,159	—	N/A	N/A	N/A
20 CityPoint	Development	Waltham, MA	—	—	6,287	46,024	—	6,287	—	46,024	52,311	—	N/A	2007	N/A

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2018 (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
Reston Gateway	Development	Reston, VA	—				—		—		25,167		—		—		—				25,167		25,167		—		N/A	1998	N/A
17Fifty Presidents Street	Development	Reston, VA	—				—		—		25,120		—		—		—				25,120		25,120		—		N/A	2013	N/A
North First Master Plan	Land	San Jose, CA	—				35,004		—		3,932		—		—		38,936				—		38,936		—		N/A	2007	N/A
Plaza at Almaden	Land	San Jose, CA	—				—		—		29,928		—		—		29,928				—		29,928		—		N/A	2006	N/A
Springfield Metro Center	Land	Springfield, VA	—				—		—		19,823		—		—		19,823				—		19,823		—		N/A	2007	N/A
214 Third Avenue	Land	Waltham, MA	—				—		—		15,233		—		—		15,233				—		15,233		—		N/A	2006	N/A
Platform 16	Land	San Jose, CA	—				—		—		12,962		—		—		12,962				—		12,962		—		N/A	2018	N/A
103 Fourth Avenue	Land	Waltham, MA	—				—		—		12,208		—		—		12,208				—		12,208		—		N/A	2007	N/A
Reston Gateway Master Plan	Land	Reston, VA	—				—		—		11,014		—		—		11,014				—		11,014		—		N/A	1998	N/A
Fourth and Harrison	Land	San Francisco, CA	—				—		—		10,350		—		—		10,350				—		10,350		—		N/A	N/A	N/A
2100 Pennsylvania Avenue	Land	Washington, DC	—				—		—		9,700		—		—		9,700				—		9,700		—		N/A	N/A	N/A
Crane Meadow	Land	Marlborough, MA	—				—		—		8,852		—		—		8,852				—		8,852		—		N/A	2000	N/A
Washingtonian North	Land	Gaithersburg, MD	—				—		—		7,473		—		—		7,473				—		7,473		—		N/A	1998	N/A
Broad Run Business Park	Land	Loudoun County, VA	—				—		—		2,388		—		—		2,388				—		2,388		—		N/A	1998	N/A
Kendall Center Master Plan	Land	Cambridge, MA	—				—		—		2,199		—		—		2,199				—		2,199		—		N/A	1997	N/A
Weston Quarry	Land	Weston, MA	—				—		—		1,237		—		—		1,237				—		1,237		—		N/A	2001	N/A
Reston Overlook Master Plan	Land	Reston, VA	—				—		—		39		—		—		39				—		39		—		N/A	2000	N/A
			$	2,964,572	(2	)	$	4,959,995	$	12,763,317	$	3,882,233	$	5,072,568	$	15,753,683	$	200,498	(3	)	$	578,796	$	21,605,545	$	4,871,102

Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $44,351. Accumulated Depreciation does not include approximately $26,675 of accumulated depreciation related to Furniture, Fixtures and Equipment.

The aggregate cost and accumulated depreciation for tax purposes was approximately $17.9 billion and $3.9 billion, respectively.

(1) Depreciation of the buildings and improvements are calculated over lives ranging from the life of the lease to 40 years.

(2) Includes unamortized deferred financing costs totaling approximately $(30.8) million.

(3) Includes pre-development costs.

Activity of Real Estate and Accumulated Depreciation [Table Text Block]

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

	2018			2017			2016
Real Estate:
Balance at the beginning of the year	$	21,058,714		$	20,114,576		$	19,451,683
Additions to/improvements of real estate	1,043,379			1,099,286			977,287
Assets sold/written-off	(496,548		)	(155,148		)	(314,394		)
Balance at the end of the year	$	21,605,545		$	21,058,714		$	20,114,576
Accumulated Depreciation:
Balance at the beginning of the year	$	4,566,570		$	4,201,891		$	3,905,940
Depreciation expense	533,342			497,059			560,024
Assets sold/written-off	(228,810		)	(132,380		)	(264,073		)
Balance at the end of the year	$	4,871,102		$	4,566,570		$	4,201,891

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

Boston Properties Limited Partnership

SEC Schedule III, Real Estate and Accumulated Depreciation [Line Items]

Real Estate and Accumulated Depreciation, By Property [Table Text Block]

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2018 (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	$	2,270,534	$	1,796,252	$	1,532,654	$	189,657		$	1,796,252	$	1,722,311	$	—	$	—	$	3,518,563	$	271,534	1968	2013	(1)
Prudential Center	Office	Boston, MA	—		92,077		948,357		472,432			100,540		1,412,222		104		—		1,512,866		535,305		1965/1993/2002/2016-2017	1998/1999/2000	(1)
Embarcadero Center	Office	San Francisco, CA	—		179,697		847,410		306,586			180,420		1,153,273		—		—		1,333,693		597,613		1970/1989	1998-1999	(1)
399 Park Avenue	Office	New York, NY	—		339,200		700,358		187,484			339,200		887,842		—		—		1,227,042		318,267		1961/2018	2002	(1)
Salesforce Tower	Office	San Francisco, CA	—		200,349		919,565		—			200,349		919,565		—		—		1,119,914		9,509		2018	2013	(1)
601 Lexington Avenue	Office	New York, NY	658,792		241,600		494,782		324,899			279,281		610,316		—		171,684		1,061,281		264,150		1977/1997	2001	(1)
200 Clarendon Street and Garage	Office	Boston, MA	—		219,543		667,884		164,073			219,616		822,218		9,666		—		1,051,500		192,137		1976	2010	(1)
250 West 55th Street	Office	New York, NY	—		285,263		603,167		48,642			285,263		651,809		—		—		937,072		94,434		2014	2007	(1)
100 Federal Street	Office	Boston, MA	—		131,067		435,954		99,702			131,067		535,656		—		—		666,723		105,536		1971-1975/2017	2012	(1)
Carnegie Center	Office	Princeton, NJ	—		107,997		389,359		141,434			104,617		530,987		3,186		—		638,790		237,322		1983-2016	1998/1999/2000/2007/2014/2017	(1)
Times Square Tower	Office	New York, NY	—		165,413		380,438		56,472			159,694		442,629		—		—		602,323		196,753		2004	2000	(1)
Atlantic Wharf	Office	Boston, MA	—		63,988		454,537		17,184			63,988		471,721		—		—		535,709		116,238		2011	2007	(1)
510 Madison Avenue	Office	New York, NY	—		103,000		253,665		24,992			103,000		278,657		—		—		381,657		62,507		2012	2010	(1)
Fountain Square	Office	Reston, VA	—		56,853		306,298		3,170			56,853		309,468		—		—		366,321		68,390		1986-1990	2012	(1)
599 Lexington Avenue	Office	New York, NY	—		81,040		100,507		146,971			81,040		247,478		—		—		328,518		164,002		1986	1997	(1)
680 Folsom Street	Office	San Francisco, CA	—		72,545		219,766		7,829			72,545		227,595		—		—		300,140		38,230		2014	2012	(1)
601 Massachusetts Avenue	Office	Washington, DC	—		95,310		165,173		3,888			95,310		169,061		—		—		264,371		18,263		2016	2008	(1)
South of Market and Democracy Tower	Office	Reston, VA	—		13,603		237,479		12,092			13,603		249,571		—		—		263,174		91,006		2008-2009	2003	(1)
Bay Colony Corporate Center	Office	Waltham, MA	—		18,789		148,451		77,133			18,789		225,584		—		—		244,373		68,903		1985-1989	2011	(1)
Gateway Center	Office	San Francisco, CA	—		28,255		139,245		58,442			29,029		196,913		—		—		225,942		106,074		1984/1986/2002	1999	(1)
535 Mission Street	Office	San Francisco, CA	—		40,933		148,378		3,259			40,933		151,637		—		—		192,570		20,576		2015	2013	(1)
2200 Pennsylvania Avenue	Office	Washington, DC	—		—		183,541		4,535			—		188,076		—		—		188,076		52,280		2011	2008	(1)
Mountain View Research Park	Office	Mountain View, CA	—		95,066		68,373		9,988			95,066		78,361		—		—		173,427		17,866		1977-1981/2007-2013	2013	(1)
Reservoir Place	Office	Waltham, MA	—		18,605		104,124		41,069			19,089		144,709		—		—		163,798		63,684		1955/1987/2017	1997/1998	(1)
1330 Connecticut Avenue	Office	Washington, DC	—		25,982		82,311		31,476			25,982		113,787		—		—		139,769		26,400		1984/2018	2004	(1)
Kingstowne Towne Center	Office	Alexandria, VA	—		18,021		109,038		1,934			18,021		110,972		—		—		128,993		41,436		2003-2006	2007	(1)
One Freedom Square	Office	Reston, VA	—		9,929		84,504		26,619			9,883		111,169		—		—		121,052		53,268		2000	2003	(1)
Weston Corporate Center	Office	Weston, MA	—		25,753		92,312		(123		)	25,854		92,088		—		—		117,942		26,176		2010	2001	(1)
Capital Gallery	Office	Washington, DC	—		4,725		29,565		77,100			6,128		105,262		—		—		111,390		65,272		1981/2006	2007	(1)
Two Freedom Square	Office	Reston, VA	—		13,930		77,739		17,215			13,866		95,018		—		—		108,884		49,768		2001	2003	(1)
One and Two Reston Overlook	Office	Reston, VA	—		16,456		66,192		19,763			15,074		87,337		—		—		102,411		46,584		1999	2000	(1)

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2018 (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
140 Kendrick Street	Office	Needham, MA	—	18,095	66,905	13,563	18,095	80,468	—	—	98,563	31,381	2000	2004	(1)
355 Main Street	Office	Cambridge, MA	—	18,863	53,346	23,403	21,098	74,514	—	—	95,612	23,620	1981/1996/2013	2006	(1)
Discovery Square	Office	Reston, VA	—	11,198	71,782	12,208	11,146	84,042	—	—	95,188	38,212	2001	2003	(1)
10 CityPoint	Office	Waltham, MA	—	1,953	85,752	4,352	1,953	90,104	—	—	92,057	7,772	2016	1997	(1)
90 Broadway	Office	Cambridge, MA	—	19,104	52,078	18,184	20,741	68,625	—	—	89,366	21,265	1983/1998/2013	2006	(1)
230 CityPoint	Office	Waltham, MA	—	13,189	49,823	20,297	13,189	70,120	—	—	83,309	25,964	1992	2005	(1)
77 CityPoint	Office	Waltham, MA	—	13,847	60,383	5,753	13,847	66,136	—	—	79,983	25,085	2008	2001	(1)
Waltham Weston Corporate Center	Office	Waltham, MA	—	10,385	60,694	8,462	10,350	69,191	—	—	79,541	32,005	2003	1999	(1)
3625-3635 Peterson Way	Office	Santa Clara, CA	—	63,206	14,879	673	63,206	14,879	673	—	78,758	8,146	1979	2016	(1)
2440 West El Camino Real	Office	Mountain View, CA	—	16,741	51,285	3,411	16,741	54,696	—	—	71,437	12,562	1987/2003	2011	(1)
300 Binney Street	Office	Cambridge, MA	—	18,080	51,262	140	18,080	51,402	—	—	69,482	9,450	2013	2009	(1)
Wisconsin Place	Office	Chevy Chase, MD	—	—	53,349	14,889	—	68,238	—	—	68,238	22,936	2009	2004	(1)
191 Spring Street	Office	Lexington, MA	—	2,850	59,751	5,603	2,850	65,354	—	—	68,204	19,435	1971/1995/2018	1997	(1)
Reston Corporate Center	Office	Reston, VA	—	9,135	50,857	3,625	9,496	54,121	—	—	63,617	27,674	1984	1998	(1)
New Dominion Technology Park, Bldg. Two	Office	Herndon, VA	—	5,584	51,868	412	5,574	52,290	—	—	57,864	24,498	2004	1998	(1)
255 Main Street	Office	Cambridge, MA	—	134	25,110	28,016	134	53,126	—	—	53,260	29,776	1987	1997	(1)
200 West Street	Office	Waltham, MA	—	16,148	24,983	8,459	16,148	33,442	—	—	49,590	21,891	1999	1997	(1)
New Dominion Technology Park, Bldg. One	Office	Herndon, VA	29,675	3,880	43,227	1,117	3,880	44,344	—	—	48,224	26,852	2001	1998	(1)
Sumner Square	Office	Washington, DC	—	624	28,745	16,974	958	45,385	—	—	46,343	24,877	1985	1999	(1)
University Place	Office	Cambridge, MA	5,571	—	37,091	7,551	27	44,615	—	—	44,642	27,519	1985	1998	(1)
2600 Tower Oaks Boulevard	Office	Rockville, MD	—	4,243	31,125	6,517	4,244	37,641	—	—	41,885	21,426	2001	1998	(1)
North First Business Park	Office	San Jose, CA	—	23,398	13,069	4,590	23,371	17,686	—	—	41,057	16,076	1981	2007	(1)
150 Broadway	Office	Cambridge, MA	—	850	25,042	6,535	822	31,605	—	—	32,427	17,909	1999	1997	(1)
325 Main Street	Office	Cambridge, MA	—	174	12,200	15,666	772	22,741	4,527	—	28,040	13,484	1987/2013	1997	(1)
105 Broadway	Office	Cambridge, MA	—	1,299	12,943	7,295	1,868	19,669	—	—	21,537	13,432	1990	1997	(1)
Lexington Office Park	Office	Lexington, MA	—	998	1,426	17,936	1,073	19,287	—	—	20,360	13,430	1982	1997	(1)
201 Spring Street	Office	Lexington, MA	—	2,849	15,303	291	2,849	15,594	—	—	18,443	8,073	1997	1997	(1)
The Point	Office	Waltham, MA	—	6,395	10,040	431	6,480	10,386	—	—	16,866	1,031	2015	2007	(1)
690 Folsom Street	Office	San Francisco, CA	—	3,219	11,038	1,157	3,219	12,195	—	—	15,414	1,790	2015	2012	(1)
92-100 Hayden Avenue	Office	Lexington, MA	—	594	6,748	6,526	619	13,249	—	—	13,868	11,629	1985	1997	(1)
181 Spring Street	Office	Lexington, MA	—	1,066	9,520	1,853	1,066	11,373	—	—	12,439	5,332	1999	1997	(1)
195 West Street	Office	Waltham, MA	—	1,611	6,652	3,281	1,611	9,933	—	—	11,544	8,084	1990	1997	(1)
33 Hayden Avenue	Office	Lexington, MA	—	266	3,234	7,586	266	10,820	—	—	11,086	8,877	1979	1997	(1)
7501 Boston Boulevard, Building Seven	Office	Springfield, VA	—	665	9,273	314	665	9,587	—	—	10,252	4,995	1997	1997	(1)

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2018 (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
7450 Boston Boulevard, Building Three	Office	Springfield, VA	—	1,165	4,681	2,864	1,327	7,383	—	—	8,710	3,628	1987	1998	(1)
7435 Boston Boulevard, Building One	Office	Springfield, VA	—	392	3,822	4,044	486	7,772	—	—	8,258	5,748	1982	1997	(1)
8000 Grainger Court, Building Five	Office	Springfield, VA	—	366	4,282	2,942	453	7,137	—	—	7,590	5,720	1984	1997	(1)
250 Binney Street	Office	Cambridge, MA	—	110	4,483	2,939	110	7,422	—	—	7,532	5,291	1983	1997	(1)
453 Ravendale Drive	Office	Mountain View, CA	—	5,477	1,090	676	5,477	1,766	—	—	7,243	558	1977	2012	(1)
7300 Boston Boulevard, Building Thirteen	Office	Springfield, VA	—	608	4,773	1,226	608	5,999	—	—	6,607	2,959	2002	1997	(1)
17 Hartwell Avenue	Office	Lexington, MA	—	26	150	5,907	26	6,057	—	—	6,083	1,406	1968	1997	(1)
7601 Boston Boulevard, Building Eight	Office	Springfield, VA	—	200	878	4,680	378	5,380	—	—	5,758	4,318	1986	1997	(1)
7500 Boston Boulevard, Building Six	Office	Springfield, VA	—	138	3,749	1,140	273	4,754	—	—	5,027	3,991	1985	1997	(1)
8000 Corporate Court, Building Eleven	Office	Springfield, VA	—	136	3,071	1,245	686	3,766	—	—	4,452	2,961	1989	1997	(1)
7375 Boston Boulevard, Building Ten	Office	Springfield, VA	—	23	2,685	811	47	3,472	—	—	3,519	2,552	1988	1997	(1)
7374 Boston Boulevard, Building Four	Office	Springfield, VA	—	241	1,605	1,445	303	2,988	—	—	3,291	2,594	1984	1997	(1)
7451 Boston Boulevard, Building Two	Office	Springfield, VA	—	249	1,542	1,346	535	2,602	—	—	3,137	2,449	1982	1997	(1)
32 Hartwell Avenue	Office	Lexington, MA	—	168	1,943	231	168	2,174	—	—	2,342	1,676	1968/1979/1987	1997	(1)
164 Lexington Road	Office	Billerica, MA	—	592	1,370	117	592	1,487	—	—	2,079	853	1982	1997	(1)
Signature at Reston	Residential	Reston, VA	—	27,076	190,580	—	27,076	190,580	—	—	217,656	3,938	2018	2013	(1)
Proto Kendall Square	Residential	Cambridge, MA	—	9,243	127,248	—	9,243	127,248	—	—	136,491	1,324	2018	2015	(1)
The Avant at Reston Town Center	Residential	Reston, VA	—	20,350	91,995	830	20,350	92,825	—	—	113,175	12,254	2014	2010	(1)
The Lofts at Atlantic Wharf	Residential	Boston, MA	—	3,529	54,891	1,768	3,529	56,659	—	—	60,188	11,131	2011	2007	(1)
Boston Marriott Cambridge	Hotel	Cambridge, MA	—	478	37,918	33,806	478	71,724	—	—	72,202	45,868	1986/2017	1997	(1)
Kendall Center Green Garage	Garage	Cambridge, MA	—	—	35,035	7,034	—	42,069	—	—	42,069	12,108	1984	2006	(1)
Kendall Center Yellow Garage	Garage	Cambridge, MA	—	1,256	15,697	909	1,256	16,606	—	—	17,862	5,472	2006	2004	(1)
Kendall Center Blue Garage	Garage	Cambridge, MA	—	1,163	11,633	480	1,163	12,113	—	—	13,276	9,030	1990	1997	(1)
145 Broadway	Development	Cambridge, MA	—	121	—	223,642	121	—	—	223,642	223,763	—	N/A	1997	N/A
MacArthur Station Residences	Development	Oakland, CA	—	—	—	87,159	—	—	—	87,159	87,159	—	N/A	N/A	N/A
20 CityPoint	Development	Waltham, MA	—	—	6,287	46,024	—	6,287	—	46,024	52,311	—	N/A	2007	N/A
Reston Gateway	Development	Reston, VA	—	—	—	25,167	—	—	—	25,167	25,167	—	N/A	1998	N/A
17Fifty Presidents Street	Development	Reston, VA	—	—	—	25,120	—	—	—	25,120	25,120	—	N/A	2013	N/A
North First Master Plan	Land	San Jose, CA	—	35,004	—	3,932	—	—	38,936	—	38,936	—	N/A	2007	N/A
Plaza at Almaden	Land	San Jose, CA	—	—	—	29,928	—	—	29,928	—	29,928	—	N/A	2006	N/A

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2018 (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
Springfield Metro Center	Land	Springfield, VA	—				—		—		19,823		—		—		19,823				—		19,823		—		N/A	2007	N/A
214 Third Avenue	Land	Waltham, MA	—				—		—		15,233		—		—		15,233				—		15,233		—		N/A	2006	N/A
Platform 16	Land	San Jose, CA	—				—		—		12,962		—		—		12,962				—		12,962		—		N/A	2018	N/A
103 Fourth Avenue	Land	Waltham, MA	—				—		—		12,208		—		—		12,208				—		12,208		—		N/A	2007	N/A
Reston Gateway Master Plan	Land	Reston, VA	—				—		—		11,014		—		—		11,014				—		11,014		—		N/A	1998	N/A
Fourth and Harrison	Land	San Francisco, CA	—				—		—		10,350		—		—		10,350				—		10,350		—		N/A	N/A	N/A
2100 Pennsylvania Avenue	Land	Washington, DC	—				—		—		9,700		—		—		9,700				—		9,700		—		N/A	N/A	N/A
Crane Meadow	Land	Marlborough, MA	—				—		—		8,852		—		—		8,852				—		8,852		—		N/A	2000	N/A
Washingtonian North	Land	Gaithersburg, MD	—				—		—		7,473		—		—		7,473				—		7,473		—		N/A	1998	N/A
Broad Run Business Park	Land	Loudoun County, VA	—				—		—		2,388		—		—		2,388				—		2,388		—		N/A	1998	N/A
Kendall Center Master Plan	Land	Cambridge, MA	—				—		—		2,199		—		—		2,199				—		2,199		—		N/A	1997	N/A
Weston Quarry	Land	Weston, MA	—				—		—		1,237		—		—		1,237				—		1,237		—		N/A	2001	N/A
Reston Overlook Master Plan	Land	Reston, VA	—				—		—		39		—		—		39				—		39		—		N/A	2000	N/A
			$	2,964,572	(2	)	$	4,959,995	$	12,763,317	$	3,483,877	$	4,971,475	$	15,456,420	$	200,498	(3	)	$	578,796	$	21,207,189	$	4,773,800

Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $44,351. Accumulated Depreciation does not include approximately $26,675 of accumulated depreciation related to Furniture, Fixtures and Equipment.

The aggregate cost and accumulated depreciation for tax purposes was approximately $19.9 billion and $4.3 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 $(30.8) million.

(3) Includes pre-development costs.

Activity of Real Estate and Accumulated Depreciation [Table Text Block]

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

	2018			2017			2016
Real Estate:
Balance at the beginning of the year	$	20,647,236		$	19,701,185		$	19,031,289
Additions to/improvements of real estate	1,043,379			1,099,286			977,287
Assets sold/written-off	(483,426		)	(153,235		)	(307,391		)
Balance at the end of the year	$	21,207,189		$	20,647,236		$	19,701,185
Accumulated Depreciation:
Balance at the beginning of the year	$	4,473,895		$	4,116,020		$	3,826,862
Depreciation expense	525,584			488,919			548,397
Assets sold/written-off	(225,679		)	(131,044		)	(259,239		)
Balance at the end of the year	$	4,773,800		$	4,473,895		$	4,116,020

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