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

12 Months Ended

Dec. 31, 2015

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, 2015 (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	Depreciable Lives  (Years)
					Land		Building
767 Fifth Avenue (the General Motors Building)	Office	New York, NY	$	1,377,986	$	1,796,252	$	1,532,654	$	45,800		$	1,796,252	$	1,578,454	$	—	$	—	$	3,374,706	$	128,488	1968	(1)
Embarcadero Center	Office	San Francisco, CA	348,886		179,697		847,410		332,276			195,987		1,163,396		—		—		1,359,383		542,103		1970/1989	(1)
Prudential Center	Office	Boston, MA	—		92,077		734,594		526,740			107,426		1,082,583		1,714		161,688		1,353,411		446,792		1965/1993/2002	(1)
399 Park Avenue	Office	New York, NY	—		339,200		700,358		110,972			354,107		796,423		—		—		1,150,530		265,266		1961	(1)
200 Clarendon Street and Garage (formerly the John Hancock Tower and Garage)	Office	Boston, MA	—		219,543		667,884		112,229			219,616		776,755		3,285		—		999,656		128,815		1976	(1)
601 Lexington Avenue	Office	New York, NY	699,061		241,600		494,782		231,812			289,639		677,238		1,317		—		968,194		250,128		1977/1997	(1)
250 West 55th Street	Office	New York, NY	—		285,263		603,167		16,488			285,263		619,655		—		—		904,918		28,349		2014	(1)
Times Square Tower	Office	New York, NY	—		165,413		380,438		84,722			169,193		461,380		—		—		630,573		164,767		2004	(1)
Carnegie Center	Office	Princeton, NJ	—		105,107		377,259		128,069			103,064		464,086		2,475		40,810		610,435		198,387		1983-1999	(1)
100 Federal Street	Office	Boston, MA	—		131,067		435,954		15,555			131,067		450,933		576		—		582,576		60,125		1971-1975	(1)
Atlantic Wharf	Office	Boston, MA	—		63,988		454,537		16,376			63,988		470,913		—		—		534,901		70,552		2011	(1)
510 Madison Avenue	Office	New York, NY	—		103,000		253,665		19,575			103,000		273,240		—		—		376,240		34,640		2012	(1)
Fountain Square	Office	Reston, VA	213,499		56,853		306,298		12,459			56,853		318,757		—		—		375,610		39,508		1986-1990	(1)
599 Lexington Avenue	Office	New York, NY	750,000		81,040		100,507		149,551			87,852		243,246		—		—		331,098		160,354		1986	(1)
680 Folsom Street	Office	San Francisco, CA	—		72,545		219,766		7,348			72,545		227,114		—		—		299,659		13,091		2014	(1)
South of Market and Democracy Tower	Office	Reston, VA	—		13,603		237,479		11,977			13,687		249,372		—		—		263,059		70,437		2008-2009	(1)
Bay Colony Corporate Center	Office	Waltham, MA	—		18,789		148,451		65,997			18,789		214,448		—		—		233,237		40,812		1985-1989	(1)
Gateway Center	Office	San Francisco, CA	—		28,255		139,245		54,027			30,627		190,900		—		—		221,527		94,083		1984/1986/2002	(1)
535 Mission Street	Office	San Francisco, CA	—		40,933		148,378		—			40,933		148,378		—		—		189,311		3,221		2015	(1)
2200 Pennsylvania Avenue	Office	Washington, DC	—		—		183,541		5,230			—		188,771		—		—		188,771		33,039		2011	(1)
Mountain View Research Park	Office	Mountain View, CA	—		95,066		68,373		5,581			95,066		73,954		—		—		169,020		9,581		1977-1981/2007-2013	(1)
Reservoir Place	Office	Waltham, MA	—		18,605		92,619		46,547			20,118		128,975		—		8,678		157,771		57,706		1955/1987	(1)
1333 New Hampshire Avenue	Office	Washington, DC	—		34,032		85,660		10,841			35,382		95,151		—		—		130,533		35,457		1996	(1)
Kingstowne Towne Center	Office	Alexandria, VA	—		18,021		109,038		1,276			18,062		110,273		—		—		128,335		33,374		2003-2006	(1)
1330 Connecticut Avenue	Office	Washington, DC	—		25,982		82,311		19,098			27,135		100,256		—		—		127,391		45,063		1984	(1)
Capital Gallery	Office	Washington, DC	—		4,725		29,565		88,569			8,662		114,197		—		—		122,859		57,489		1981/2006	(1)
Weston Corporate Center	Office	Weston, MA	—		25,753		92,312		(123		)	25,854		92,088		—		—		117,942		17,023		2010	(1)
One Freedom Square	Office	Reston, VA	—		9,929		84,504		19,613			11,293		102,753		—		—		114,046		41,106		2000	(1)
Two Freedom Square	Office	Reston, VA	—		13,930		77,739		21,374			15,420		97,623		—		—		113,043		41,164		2001	(1)

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2015 (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	Depreciable Lives  (Years)
				Land	Building
One and Two Reston Overlook	Office	Reston, VA	—	16,456	66,192	22,385		16,179	88,854	—	—	105,033	37,165	1999	(1)
Discovery Square	Office	Reston, VA	—	11,198	71,782	21,234		12,533	91,681	—	—	104,214	35,835	2001	(1)
415 Main Street	Office	Cambridge, MA	—	3,457	97,136	2,986		4,125	99,454	—	—	103,579	59,405	2006	(1)
355 Main Street	Office	Cambridge, MA	—	18,863	53,346	28,822		21,173	79,858	—	—	101,031	23,372	1981/1996/2013	(1)
140 Kendrick Street	Office	Needham, MA	—	18,095	66,905	15,075		19,092	80,983	—	—	100,075	23,191	2000	(1)
90 Broadway	Office	Cambridge, MA	—	19,104	52,078	17,386		20,785	67,783	—	—	88,568	14,394	1983/1998/2013	(1)
230 CityPoint	Office	Waltham, MA	—	13,189	49,823	18,800		13,593	68,219	—	—	81,812	20,265	1992	(1)
Waltham Weston Corporate Center	Office	Waltham, MA	—	10,385	60,694	8,907		11,097	68,889	—	—	79,986	24,699	2003	(1)
77 CityPoint	Office	Waltham, MA	—	13,847	60,383	5,605		13,873	65,962	—	—	79,835	18,930	2008	(1)
North First Business Park	Office	San Jose, CA	—	58,402	13,069	4,028		23,377	16,214	35,908	—	75,499	14,139	1981	(1)
300 Binney Street	Office	Cambridge, MA	—	18,080	51,262	140		18,080	51,402	—	—	69,482	4,375	2013	(1)
2440 West El Camino Real	Office	Mountain View, CA	—	16,741	51,285	1,422		16,741	52,707	—	—	69,448	8,185	1987/2003	(1)
Reston Corporate Center	Office	Reston, VA	—	9,135	50,857	6,464		10,148	56,308	—	—	66,456	23,962	1984	(1)
Wisconsin Place	Office	Chevy Chase, MD	—	—	53,349	12,787		—	66,136	—	—	66,136	18,272	2009	(1)
New Dominion Technology Park, Bldg. Two	Office	Herndon, VA	—	5,584	51,868	3,911		6,510	54,853	—	—	61,363	20,110	2004	(1)
Sumner Square	Office	Washington, DC	—	624	28,745	26,196		1,478	54,087	—	—	55,565	26,923	1985	(1)
200 West Street	Office	Waltham, MA	—	16,148	24,983	10,102		16,813	34,420	—	—	51,233	18,034	1999	(1)
New Dominion Technology Park, Bldg. One	Office	Herndon, VA	38,494	3,880	43,227	3,883		4,583	46,407	—	—	50,990	22,760	2001	(1)
191 Spring Street	Office	Lexington, MA	—	2,850	27,166	18,610		3,151	45,475	—	—	48,626	32,535	1971/1995	(1)
University Place	Office	Cambridge, MA	10,788	—	37,091	9,483		390	46,184	—	—	46,574	23,635	1985	(1)
2600 Tower Oaks Boulevard	Office	Rockville, MD	—	4,243	31,125	8,656		4,785	39,239	—	—	44,024	18,386	2001	(1)
255 Main Street	Office	Cambridge, MA	—	134	25,110	18,559		548	43,255	—	—	43,803	27,153	1987	(1)
Quorum Office Park	Office	Chelmsford, MA	—	3,750	32,454	5,814		5,187	36,831	—	—	42,018	14,671	2001	(1)
500 E Street	Office	Washington, DC	—	109	22,420	13,144		2,379	33,294	—	—	35,673	22,616	1987	(1)
150 Broadway	Office	Cambridge, MA	—	850	25,042	8,623		1,323	33,192	—	—	34,515	14,073	1999	(1)
325 Main Street	Office	Cambridge, MA	—	174	12,200	12,368		965	23,777	—	—	24,742	11,339	1987/2013	(1)
105 Broadway	Office	Cambridge, MA	—	1,299	12,943	7,177		2,395	19,024	—	—	21,419	12,556	1990	(1)
40 Shattuck Road	Office	Andover, MA	—	709	14,740	3,184		893	17,740	—	—	18,633	6,846	2001	(1)
Lexington Office Park	Office	Lexington, MA	—	998	1,426	16,099		1,264	17,259	—	—	18,523	11,730	1982	(1)
201 Spring Street	Office	Lexington, MA	—	2,849	15,303	(154	)	3,124	14,874	—	—	17,998	6,987	1997	(1)
The Point (formerly 99 Third Avenue Retail)	Office	Waltham, MA	—	6,395	10,040	—		6,395	10,040	—	—	16,435	76	2015	(1)
91 Hartwell Avenue	Office	Lexington, MA	—	784	6,464	8,192		941	14,499	—	—	15,440	8,525	1985	(1)
92-100 Hayden Avenue	Office	Lexington, MA	—	594	6,748	8,034		802	14,574	—	—	15,376	11,412	1985	(1)
690 Folsom Street	Office	San Francisco, CA	—	3,219	11,038	—		3,219	11,038	—	—	14,257	334	2015	(1)
195 West Street	Office	Waltham, MA	—	1,611	6,652	4,340		1,858	10,745	—	—	12,603	7,071	1990	(1)
181 Spring Street	Office	Lexington, MA	—	1,066	9,520	1,993		1,160	11,419	—	—	12,579	4,580	1999	(1)

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2015 (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	Depreciable Lives  (Years)
				Land	Building
33 Hayden Avenue	Office	Lexington, MA	—	266	3,234	8,787	425	11,862	—	—	12,287	6,586	1979	(1)
145 Broadway	Office	Cambridge, MA	—	121	5,535	5,305	324	10,637	—	—	10,961	7,864	1984	(1)
7501 Boston Boulevard, Building Seven	Office	Springfield, VA	—	665	9,273	520	791	9,667	—	—	10,458	4,355	1997	(1)
7435 Boston Boulevard, Building One	Office	Springfield, VA	—	392	3,822	4,218	659	7,773	—	—	8,432	6,052	1982	(1)
250 Binney Street	Office	Cambridge, MA	—	110	4,483	3,593	273	7,913	—	—	8,186	4,303	1983	(1)
7450 Boston Boulevard, Building Three	Office	Springfield, VA	—	1,165	4,681	1,880	1,430	6,296	—	—	7,726	3,226	1987	(1)
8000 Grainger Court, Building Five	Office	Springfield, VA	—	366	4,282	2,684	601	6,731	—	—	7,332	5,336	1984	(1)
453 Ravendale Drive	Office	Mountain View, CA	—	5,477	1,090	235	5,479	1,323	—	—	6,802	265	1977	(1)
7500 Boston Boulevard, Building Six	Office	Springfield, VA	—	138	3,749	2,617	406	6,098	—	—	6,504	4,499	1985	(1)
7300 Boston Boulevard, Building Thirteen	Office	Springfield, VA	—	608	4,773	709	661	5,429	—	—	6,090	4,626	2002	(1)
7601 Boston Boulevard, Building Eight	Office	Springfield, VA	—	200	878	4,924	551	5,451	—	—	6,002	3,849	1986	(1)
8000 Corporate Court, Building Eleven	Office	Springfield, VA	—	136	3,071	1,615	775	4,047	—	—	4,822	2,639	1989	(1)
7375 Boston Boulevard, Building Ten	Office	Springfield, VA	—	23	2,685	1,003	93	3,618	—	—	3,711	2,464	1988	(1)
7374 Boston Boulevard, Building Four	Office	Springfield, VA	—	241	1,605	1,735	398	3,183	—	—	3,581	2,345	1984	(1)
7451 Boston Boulevard, Building Two	Office	Springfield, VA	—	249	1,542	1,661	613	2,839	—	—	3,452	2,233	1982	(1)
32 Hartwell Avenue	Office	Lexington, MA	—	168	1,943	1,193	314	2,990	—	—	3,304	1,786	1968-1979/1987	(1)
164 Lexington Road	Office	Billerica, MA	—	592	1,370	319	643	1,638	—	—	2,281	786	1982	(1)
17 Hartwell Avenue	Office	Lexington, MA	—	26	150	614	65	725	—	—	790	323	1968	(1)
The Avant at Reston Town Center	Residential	Reston, VA	—	20,350	91,995	813	20,350	92,808	—	—	113,158	4,833	2014	(1)
The Lofts at Atlantic Wharf	Residential	Boston, MA	—	3,529	54,891	1,579	3,529	56,470	—	—	59,999	6,596	2011	(1)
Boston Marriott Cambridge	Hotel	Cambridge, MA	—	478	37,918	35,665	1,201	72,860	—	—	74,061	48,162	1986	(1)
Kendall Center Green Garage (formerly Cambridge Center East Garage)	Garage	Cambridge, MA	—	—	35,035	4,254	103	39,186	—	—	39,289	8,610	1984	(1)
Kendall Center Yellow Garage (formerly Cambridge Center West Garage)	Garage	Cambridge, MA	—	1,256	15,697	1,571	1,434	17,090	—	—	18,524	4,269	2006	(1)
Kendall Center Blue Garage (formerly Cambridge Center North Garage)	Garage	Cambridge, MA	—	1,163	11,633	2,770	1,579	13,987	—	—	15,566	8,941	1990	(1)
Salesforce Tower	Development	San Francisco, CA	—	—	—	429,767	—	—	—	429,767	429,767	—	N/A	N/A
601 Massachusetts Avenue	Development	Washington, DC	—	—	—	253,176	95,322	140,791	—	17,063	253,176	1,531	N/A	N/A
10 CityPoint	Development	Waltham, MA	—	—	—	70,389	163	—	—	70,226	70,389	—	N/A	N/A
Reston Signature Site	Development	Reston, VA	—	—	—	38,886	—	—	12,678	26,208	38,886	—	N/A	N/A
Cambridge Residential / 88 Ames	Development	Cambridge, MA	—	—	—	9,495	—	—	—	9,495	9,495	—	N/A	N/A

Boston Properties, Inc. Schedule 3 - Real Estate and Accumulated Depreciation December 31, 2015 (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	Depreciable Lives  (Years)
							Land		Building
Springfield Metro Center	Land	Springfield, VA	—				—		—		34,870		—		—		34,870		—		34,870		—		N/A	N/A
Tower Oaks Master Plan	Land	Rockville, MD	—				—		—		29,022		—		—		29,022		—		29,022		—		N/A	N/A
Plaza at Almaden	Land	San Jose, CA	—				—		—		29,010		—		—		29,010		—		29,010		—		N/A	N/A
6601 & 6605 Springfield Center Drive	Land	Springfield, VA	—				—		—		13,866		—		—		13,866		—		13,866		—		N/A	N/A
214 Third Avenue	Land	Waltham, MA	—				—		—		13,415		—		132		13,283		—		13,415		—		N/A	N/A
103 Fourth Avenue	Land	Waltham, MA	—				—		—		11,927		—		—		11,927		—		11,927		—		N/A	N/A
Reston Gateway	Land	Reston, VA	—				—		—		10,294		—		—		10,294		—		10,294		—		N/A	N/A
20 CityPoint	Land	Waltham, MA	—				—		—		10,258		—		—		10,258		—		10,258		—		N/A	N/A
Reston Eastgate	Land	Reston, VA	—				—		—		9,215		—		—		9,215		—		9,215		—		N/A	N/A
Washingtonian North	Land	Gaithersburg, MD	—				—		—		8,836		—		—		8,836		—		8,836		—		N/A	N/A
Crane Meadow	Land	Marlborough, MA	—				—		—		8,727		—		—		8,727		—		8,727		—		N/A	N/A
Broad Run Business Park	Land	Loudoun County, VA	—				—		—		6,399		—		—		6,399		—		6,399		—		N/A	N/A
North First Master Plan	Land	San Jose, CA	—				—		—		2,999		—		—		2,999		—		2,999		—		N/A	N/A
Fourth and Harrison (formerly 425 Fourth Street)	Land	San Francisco, CA	—				—		—		2,920		—		—		2,920		—		2,920		—		N/A	N/A
Kendall Center Master Plan (formerly Cambridge Master Plan)	Land	Cambridge, MA	—				—		—		1,403		—		—		1,403		—		1,403		—		N/A	N/A
30 Shattuck Road	Land	Andover, MA	—				—		—		1,213		—		—		1,213		—		1,213		—		N/A	N/A
			$	3,438,714	(2	)	$	4,602,809	$	11,248,289	$	3,600,585	$	4,806,021	$	13,629,532	$	252,195	$	763,935	$	19,451,683	$	3,905,940

Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $29,852. Accumulated Depreciation does not include approximately $19,954 of accumulated depreciation related to Furniture, Fixtures and Equipment.

The aggregate cost and accumulated depreciation for tax purposes was approximately $15.0 billion and $3.0 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 the unamortized balance of the historical fair value adjustment totaling approximately $80.2 million.

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

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

	2015			2014			2013
Real Estate:
Balance at the beginning of the year	$	19,208,417		$	18,953,601		$	14,869,887
Additions to/improvements of real estate	700,792			594,296			4,410,622
Assets sold/written-off	(457,526		)	(339,480		)	(326,908		)
Balance at the end of the year	$	19,451,683		$	19,208,417		$	18,953,601
Accumulated Depreciation:
Balance at the beginning of the year	$	3,529,978		$	3,145,701		$	2,919,479
Depreciation expense	486,450			456,176			419,908
Assets sold/written-off	(110,488		)	(71,899		)	(193,686		)
Balance at the end of the year	$	3,905,940		$	3,529,978		$	3,145,701

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

Boston Properties Limited Partnership [Member]

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, 2015 (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	Depreciable Lives (Years)
Property Name	Type	Location	Encumbrances		Land		Building
767 Fifth Avenue (the General Motors Building)	Office	New York, NY	$	1,377,986	$	1,796,252	$	1,532,654	$	45,800		$	1,796,252	$	1,578,454	$	—	$	—	$	3,374,706	$	128,488	1968	(1)
Prudential Center	Office	Boston, MA	—		92,077		734,594		466,370			92,328		1,037,311		1,714		161,688		1,293,041		435,437		1965/1993/2002	(1)
Embarcadero Center	Office	San Francisco, CA	348,886		179,697		847,410		269,895			180,420		1,116,582		—		—		1,297,002		530,307		1970/1989	(1)
399 Park Avenue	Office	New York, NY	—		339,200		700,358		51,364			339,200		751,722		—		—		1,090,922		254,028		1961	(1)
200 Clarendon Street and Garage (formerly the John Hancock Tower and Garage)	Office	Boston, MA	—		219,543		667,884		112,229			219,616		776,755		3,285		—		999,656		128,815		1976	(1)
601 Lexington Avenue	Office	New York, NY	699,061		241,600		494,782		190,393			279,281		646,177		1,317		—		926,775		242,358		1977/1997	(1)
250 West 55th Street	Office	New York, NY	—		285,263		603,167		16,488			285,263		619,655		—		—		904,918		28,349		2014	(1)
Carnegie Center	Office	Princeton, NJ	—		105,107		377,259		110,751			98,733		451,099		2,475		40,810		593,117		195,128		1983-1999	(1)
Times Square Tower	Office	New York, NY	—		165,413		380,438		46,743			159,694		432,900		—		—		592,594		157,622		2004	(1)
100 Federal Street	Office	Boston, MA	—		131,067		435,954		15,555			131,067		450,933		576		—		582,576		60,125		1971-1975	(1)
Atlantic Wharf	Office	Boston, MA	—		63,988		454,537		16,376			63,988		470,913		—		—		534,901		70,552		2011	(1)
510 Madison Avenue	Office	New York, NY	—		103,000		253,665		19,575			103,000		273,240		—		—		376,240		34,640		2012	(1)
Fountain Square	Office	Reston, VA	213,499		56,853		306,298		12,459			56,853		318,757		—		—		375,610		39,508		1986-1990	(1)
599 Lexington Avenue	Office	New York, NY	750,000		81,040		100,507		122,309			81,040		222,816		—		—		303,856		155,235		1986	(1)
680 Folsom Street	Office	San Francisco, CA	—		72,545		219,766		7,348			72,545		227,114		—		—		299,659		13,091		2014	(1)
South of Market and Democracy Tower	Office	Reston, VA	—		13,603		237,479		11,641			13,603		249,120		—		—		262,723		70,389		2008-2009	(1)
Bay Colony Corporate Center	Office	Waltham, MA	—		18,789		148,451		65,997			18,789		214,448		—		—		233,237		40,812		1985-1989	(1)
Gateway Center	Office	San Francisco, CA	—		28,255		139,245		47,638			29,029		186,109		—		—		215,138		92,882		1984/1986/2002	(1)
535 Mission Street	Office	San Francisco, CA	—		40,933		148,378		—			40,933		148,378		—		—		189,311		3,221		2015	(1)
2200 Pennsylvania Avenue	Office	Washington, DC	—		—		183,541		5,230			—		188,771		—		—		188,771		33,039		2011	(1)
Mountain View Research Park	Office	Mountain View, CA	—		95,066		68,373		5,581			95,066		73,954		—		—		169,020		9,581		1977-1981/2007-2013	(1)
Reservoir Place	Office	Waltham, MA	—		18,605		92,619		42,472			19,099		125,919		—		8,678		153,696		56,939		1955/1987	(1)
Kingstowne Towne Center	Office	Alexandria, VA	—		18,021		109,038		1,112			18,021		110,150		—		—		128,171		33,350		2003-2006	(1)
1333 New Hampshire Avenue	Office	Washington, DC	—		34,032		85,660		5,447			34,032		91,107		—		—		125,139		34,441		1996	(1)
1330 Connecticut Avenue	Office	Washington, DC	—		25,982		82,311		14,485			25,982		96,796		—		—		122,778		44,193		1984	(1)
Weston Corporate Center	Office	Weston, MA	—		25,753		92,312		(123		)	25,854		92,088		—		—		117,942		17,023		2010	(1)
Capital Gallery	Office	Washington, DC	—		4,725		29,565		78,438			6,128		106,600		—		—		112,728		55,581		1981/2006	(1)
One Freedom Square	Office	Reston, VA	—		9,929		84,504		13,976			9,883		98,526		—		—		108,409		40,044		2000	(1)
Two Freedom Square	Office	Reston, VA	—		13,930		77,739		15,162			13,866		92,965		—		—		106,831		39,996		2001	(1)
415 Main Street	Office	Cambridge, MA	—		3,457		97,136		316			3,457		97,452		—		—		100,909		58,907		2006	(1)
355 Main Street	Office	Cambridge, MA	—		18,863		53,346		28,524			21,098		79,635		—		—		100,733		23,319		1981/1996/2013	(1)
One and Two Reston Overlook	Office	Reston, VA	—		16,456		66,192		17,967			15,074		85,541		—		—		100,615		36,334		1999	(1)
Discovery Square	Office	Reston, VA	—		11,198		71,782		15,689			11,146		87,523		—		—		98,669		34,789		2001	(1)
140 Kendrick Street	Office	Needham, MA	—		18,095		66,905		11,085			18,095		77,990		—		—		96,085		22,441		2000	(1)

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2015 (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	Depreciable Lives (Years)
Property Name	Type	Location	Encumbrances	Land	Building
90 Broadway	Office	Cambridge, MA	—	19,104	52,078	17,207		20,741	67,648	—	—	88,389	14,366	1983/1998/2013	(1)
230 CityPoint	Office	Waltham, MA	—	13,189	49,823	17,183		13,189	67,006	—	—	80,195	19,965	1992	(1)
77 CityPoint	Office	Waltham, MA	—	13,847	60,383	5,500		13,847	65,883	—	—	79,730	18,914	2008	(1)
Waltham Weston Corporate Center	Office	Waltham, MA	—	10,385	60,694	5,920		10,350	66,649	—	—	76,999	24,136	2003	(1)
North First Business Park	Office	San Jose, CA	—	58,402	13,069	4,005		23,371	16,197	35,908	—	75,476	14,139	1981	(1)
300 Binney Street	Office	Cambridge, MA	—	18,080	51,262	140		18,080	51,402	—	—	69,482	4,375	2013	(1)
2440 West El Camino Real	Office	Mountain View, CA	—	16,741	51,285	1,422		16,741	52,707	—	—	69,448	8,185	1987/2003	(1)
Wisconsin Place	Office	Chevy Chase, MD	—	—	53,349	12,787		—	66,136	—	—	66,136	18,272	2009	(1)
Reston Corporate Center	Office	Reston, VA	—	9,135	50,857	3,853		9,496	54,349	—	—	63,845	23,471	1984	(1)
New Dominion Technology Park, Bldg. Two	Office	Herndon, VA	—	5,584	51,868	166		5,574	52,044	—	—	57,618	19,401	2004	(1)
Sumner Square	Office	Washington, DC	—	624	28,745	24,116		958	52,527	—	—	53,485	26,534	1985	(1)
200 West Street	Office	Waltham, MA	—	16,148	24,983	7,441		16,148	32,424	—	—	48,572	17,532	1999	(1)
New Dominion Technology Park, Bldg. One	Office	Herndon, VA	38,494	3,880	43,227	1,074		3,880	44,301	—	—	48,181	22,230	2001	(1)
191 Spring Street	Office	Lexington, MA	—	2,850	27,166	17,411		2,850	44,577	—	—	47,427	32,307	1971/1995	(1)
University Place	Office	Cambridge, MA	10,788	—	37,091	8,033		27	45,097	—	—	45,124	23,365	1985	(1)
255 Main Street	Office	Cambridge, MA	—	134	25,110	16,903		134	42,013	—	—	42,147	26,843	1987	(1)
2600 Tower Oaks Boulevard	Office	Rockville, MD	—	4,243	31,125	6,493		4,244	37,617	—	—	41,861	17,977	2001	(1)
Quorum Office Park	Office	Chelmsford, MA	—	3,750	32,454	4,115		4,762	35,557	—	—	40,319	14,352	2001	(1)
150 Broadway	Office	Cambridge, MA	—	850	25,042	6,618		822	31,688	—	—	32,510	13,693	1999	(1)
500 E Street	Office	Washington, DC	—	109	22,420	9,904		1,569	30,864	—	—	32,433	22,008	1987	(1)
325 Main Street	Office	Cambridge, MA	—	174	12,200	11,597		772	23,199	—	—	23,971	11,192	1987/2013	(1)
105 Broadway	Office	Cambridge, MA	—	1,299	12,943	5,071		1,868	17,445	—	—	19,313	12,158	1990	(1)
40 Shattuck Road	Office	Andover, MA	—	709	14,740	2,448		709	17,188	—	—	17,897	6,707	2001	(1)
Lexington Office Park	Office	Lexington, MA	—	998	1,426	15,335		1,073	16,686	—	—	17,759	11,589	1982	(1)
201 Spring Street	Office	Lexington, MA	—	2,849	15,303	(1,253	)	2,849	14,050	—	—	16,899	6,779	1997	(1)
The Point (formerly 99 Third Avenue Retail)	Office	Waltham, MA	—	6,395	10,040	—		6,395	10,040	—	—	16,435	76	2015	(1)
91 Hartwell Avenue	Office	Lexington, MA	—	784	6,464	7,565		784	14,029	—	—	14,813	8,405	1985	(1)
92-100 Hayden Avenue	Office	Lexington, MA	—	594	6,748	7,305		619	14,028	—	—	14,647	11,274	1985	(1)
690 Folsom Street	Office	San Francisco, CA	—	3,219	11,038	—		3,219	11,038	—	—	14,257	334	2015	(1)
181 Spring Street	Office	Lexington, MA	—	1,066	9,520	1,616		1,066	11,136	—	—	12,202	4,509	1999	(1)
33 Hayden Avenue	Office	Lexington, MA	—	266	3,234	8,150		266	11,384	—	—	11,650	6,466	1979	(1)
195 West Street	Office	Waltham, MA	—	1,611	6,652	3,351		1,611	10,003	—	—	11,614	6,882	1990	(1)
145 Broadway	Office	Cambridge, MA	—	121	5,535	4,492		121	10,027	—	—	10,148	7,713	1984	(1)
7501 Boston Boulevard, Building Seven	Office	Springfield, VA	—	665	9,273	15		665	9,288	—	—	9,953	4,259	1997	(1)
7435 Boston Boulevard, Building One	Office	Springfield, VA	—	392	3,822	3,525		486	7,253	—	—	7,739	5,922	1982	(1)

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2015 (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	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	4,183	1983	(1)
7450 Boston Boulevard, Building Three	Office	Springfield, VA	—	1,165	4,681	1,466	1,327	5,985	—	—	7,312	3,145	1987	(1)
453 Ravendale Drive	Office	Mountain View, CA	—	5,477	1,090	233	5,477	1,323	—	—	6,800	265	1977	(1)
8000 Grainger Court, Building Five	Office	Springfield, VA	—	366	4,282	2,090	453	6,285	—	—	6,738	5,225	1984	(1)
7500 Boston Boulevard, Building Six	Office	Springfield, VA	—	138	3,749	2,084	273	5,698	—	—	5,971	4,399	1985	(1)
7300 Boston Boulevard, Building Thirteen	Office	Springfield, VA	—	608	4,773	497	608	5,270	—	—	5,878	4,586	2002	(1)
7601 Boston Boulevard, Building Eight	Office	Springfield, VA	—	200	878	4,231	378	4,931	—	—	5,309	3,719	1986	(1)
8000 Corporate Court, Building Eleven	Office	Springfield, VA	—	136	3,071	1,264	687	3,784	—	—	4,471	2,570	1989	(1)
7375 Boston Boulevard, Building Ten	Office	Springfield, VA	—	23	2,685	822	47	3,483	—	—	3,530	2,432	1988	(1)
7374 Boston Boulevard, Building Four	Office	Springfield, VA	—	241	1,605	1,352	303	2,895	—	—	3,198	2,275	1984	(1)
7451 Boston Boulevard, Building Two	Office	Springfield, VA	—	249	1,542	1,348	535	2,604	—	—	3,139	2,173	1982	(1)
32 Hartwell Avenue	Office	Lexington, MA	—	168	1,943	607	168	2,550	—	—	2,718	1,674	1968-1979/1987	(1)
164 Lexington Road	Office	Billerica, MA	—	592	1,370	117	592	1,487	—	—	2,079	745	1982	(1)
17 Hartwell Avenue	Office	Lexington, MA	—	26	150	457	26	607	—	—	633	293	1968	(1)
The Avant at Reston Town Center	Residential	Reston, VA	—	20,350	91,995	813	20,350	92,808	—	—	113,158	4,833	2014	(1)
The Lofts at Atlantic Wharf	Residential	Boston, MA	—	3,529	54,891	1,579	3,529	56,470	—	—	59,999	6,596	2011	(1)
Boston Marriott Cambridge	Hotel	Cambridge, MA	—	478	37,918	32,774	478	70,692	—	—	71,170	47,620	1986	(1)
Kendall Center Green Garage (formerly Cambridge Center East Garage)	Garage	Cambridge, MA	—	—	35,035	3,840	—	38,875	—	—	38,875	8,534	1984	(1)
Kendall Center Yellow Garage (formerly Cambridge Center West Garage)	Garage	Cambridge, MA	—	1,256	15,697	859	1,256	16,556	—	—	17,812	4,140	2006	(1)
Kendall Center Blue Garage (formerly Cambridge Center North Garage)	Garage	Cambridge, MA	—	1,163	11,633	1,105	1,163	12,738	—	—	13,901	8,630	1990	(1)
Salesforce Tower	Development	San Francisco, CA	—	—	—	429,767	—	—	—	429,767	429,767	—	N/A	N/A
601 Massachusetts Avenue	Development	Washington, DC	—	—	—	253,166	95,312	140,791	—	17,063	253,166	1,531	N/A	N/A
10 CityPoint	Development	Waltham, MA	—	—	—	70,226	—	—	—	70,226	70,226	—	N/A	N/A
Reston Signature Site	Development	Reston, VA	—	—	—	38,886	—	—	12,678	26,208	38,886	—	N/A	N/A
Cambridge Residential / 88 Ames	Development	Cambridge, MA	—	—	—	9,495	—	—	—	9,495	9,495	—	N/A	N/A
Springfield Metro Center	Land	Springfield, VA	—	—	—	34,870	—	—	34,870	—	34,870	—	N/A	N/A
Tower Oaks Master Plan	Land	Rockville, MD	—	—	—	29,022	—	—	29,022	—	29,022	—	N/A	N/A
Plaza at Almaden	Land	San Jose, CA	—	—	—	29,010	—	—	29,010	—	29,010	—	N/A	N/A

Boston Properties Limited Partnership Schedule 3—Real Estate and Accumulated Depreciation December 31, 2015 (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	Depreciable Lives (Years)
Property Name	Type	Location	Encumbrances				Land		Building
6601 & 6605 Springfield Center Drive	Land	Springfield, VA	—				—		—		13,866		—		—		13,866		—		13,866		—		N/A	N/A
214 Third Avenue	Land	Waltham, MA	—				—		—		13,415		—		132		13,283		—		13,415		—		N/A	N/A
103 Fourth Avenue	Land	Waltham, MA	—				—		—		11,927		—		—		11,927		—		11,927		—		N/A	N/A
Reston Gateway	Land	Reston, VA	—				—		—		10,294		—		—		10,294		—		10,294		—		N/A	N/A
20 CityPoint	Land	Waltham, MA	—				—		—		10,258		—		—		10,258		—		10,258		—		N/A	N/A
Reston Eastgate	Land	Reston, VA	—				—		—		9,215		—		—		9,215		—		9,215		—		N/A	N/A
Washingtonian North	Land	Gaithersburg, MD	—				—		—		8,836		—		—		8,836		—		8,836		—		N/A	N/A
Crane Meadow	Land	Marlborough, MA	—				—		—		8,727		—		—		8,727		—		8,727		—		N/A	N/A
Broad Run Business Park	Land	Loudoun County, VA	—				—		—		6,399		—		—		6,399		—		6,399		—		N/A	N/A
North First Master Plan	Land	San Jose, CA	—				—		—		2,999		—		—		2,999		—		2,999		—		N/A	N/A
Fourth and Harrison (formerly 425 Fourth Street)	Land	San Francisco, CA	—				—		—		2,920		—		—		2,920		—		2,920		—		N/A	N/A
Kendall Center Master Plan (formerly Cambridge Master Plan)	Land	Cambridge, MA	—				—		—		1,403		—		—		1,403		—		1,403		—		N/A	N/A
30 Shattuck Road	Land	Andover, MA	—				—		—		1,213		—		—		1,213		—		1,213		—		N/A	N/A
			$	3,438,714	(2	)	$	4,602,809	$	11,248,289	$	3,180,191	$	4,700,793	$	13,314,366	$	252,195	$	763,935	$	19,031,289	$	3,826,862

Note: Total Real Estate does not include Furniture, Fixtures and Equipment totaling approximately $29,852. Accumulated Depreciation does not include approximately $19,954 of accumulated depreciation related to Furniture, Fixtures and Equipment.

The aggregate cost and accumulated depreciation for tax purposes was approximately $16.8 billion and $3.4 billion, respectively.

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

(2) Includes the unamortized balance of the historical fair value adjustment totaling approximately

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

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

	2015			2014			2013
Real Estate:
Balance at the beginning of the year	$	18,786,572		$	18,523,277		$	14,431,521
Additions to/improvements of real estate	700,792			594,296			4,410,622
Assets sold/written-off	(456,075		)	(331,001		)	(318,866		)
Balance at the end of the year	$	19,031,289		$	18,786,572		$	18,523,277
Accumulated Depreciation:
Balance at the beginning of the year	$	3,458,640		$	3,081,040		$	2,862,302
Depreciation expense	478,457			447,667			411,860
Assets sold/written-off	(110,235		)	(70,067		)	(193,122		)
Balance at the end of the year	$	3,826,862		$	3,458,640		$	3,081,040

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