Schedule III - Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation (Details) - USD ($)		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		$ 205,198,000
Initial Costs
Land		6,811,325,000
Buildings & Improvements		9,824,856,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		12,115,729,000
Total Costs
Land		6,811,325,000
Buildings & Improvements		21,940,585,000
Total		28,751,910,000	[1]	$ 21,274,810,000	$ 17,552,956,000	$ 14,181,780,000
Accumulated Depreciation		(3,771,241,000)	[2]	$ (3,182,438,000)	$ (2,708,918,000)	$ (2,268,087,000)
Net Cost Basis		24,980,669,000
Investment in Real Estate, Federal Income Tax Basis		29,300,000,000
Investment in real estate over cost basis of real estate for federal income tax purpose		$ (578,400,000)
Maximum | Buildings and building improvements
Total Costs
Estimated useful life		40 years
Maximum | Land improvements
Total Costs
Estimated useful life		20 years
North America
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		$ 205,198,000
Initial Costs
Land		6,811,325,000
Buildings & Improvements		9,824,856,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		12,096,927,000
Total Costs
Land		6,811,325,000
Buildings & Improvements		21,921,783,000
Total	[1]	28,733,108,000
Accumulated Depreciation	[2]	(3,766,758,000)
Net Cost Basis		24,966,350,000
Alexandria Center at Kendall Square
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		511,875,000
Buildings & Improvements		822,706,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,470,329,000
Total Costs
Land		511,875,000
Buildings & Improvements		2,293,035,000
Total	[1]	2,804,910,000
Accumulated Depreciation	[2]	(362,489,000)
Net Cost Basis		2,442,421,000
Alexandria Center at One Kendall Square
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		196,529,000
Initial Costs
Land		349,952,000
Buildings & Improvements		483,816,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		509,540,000
Total Costs
Land		349,952,000
Buildings & Improvements		993,356,000
Total	[1]	1,343,308,000
Accumulated Depreciation	[2]	(143,728,000)
Net Cost Basis		1,199,580,000
Alexandria Technology Square®
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		619,658,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		277,958,000
Total Costs
Land		0
Buildings & Improvements		897,616,000
Total	[1]	897,616,000
Accumulated Depreciation	[2]	(306,522,000)
Net Cost Basis		591,094,000
The Arsenal on the Charles
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		191,797,000
Buildings & Improvements		354,611,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		221,488,000
Total Costs
Land		191,797,000
Buildings & Improvements		576,099,000
Total	[1]	767,896,000
Accumulated Depreciation	[2]	(16,705,000)
Net Cost Basis		751,191,000
480/500 Arsenal Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		104,628,000
Buildings & Improvements		21,623,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		106,026,000
Total Costs
Land		104,628,000
Buildings & Improvements		127,649,000
Total	[1]	232,277,000
Accumulated Depreciation	[2]	(48,239,000)
Net Cost Basis		184,038,000
640 Memorial Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		174,878,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,390,000
Total Costs
Land		0
Buildings & Improvements		176,268,000
Total	[1]	176,268,000
Accumulated Depreciation	[2]	(51,565,000)
Net Cost Basis		124,703,000
780/790 Memorial Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		55,236,000
Total Costs
Land		0
Buildings & Improvements		55,236,000
Total	[1]	55,236,000
Accumulated Depreciation	[2]	(27,307,000)
Net Cost Basis		27,929,000
167 Sidney Street/99 Erie Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		12,613,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		13,909,000
Total Costs
Land		0
Buildings & Improvements		26,522,000
Total	[1]	26,522,000
Accumulated Depreciation	[2]	(8,783,000)
Net Cost Basis		17,739,000
79/96 Thirteenth Street Charlestown Navy Yard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		6,247,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		8,762,000
Total Costs
Land		0
Buildings & Improvements		15,009,000
Total	[1]	15,009,000
Accumulated Depreciation	[2]	(6,817,000)
Net Cost Basis		8,192,000
Alexandria Center for Life Science - Fenway
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		912,016,000
Buildings & Improvements		617,552,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		164,634,000
Total Costs
Land		912,016,000
Buildings & Improvements		782,186,000
Total	[1]	1,694,202,000
Accumulated Depreciation	[2]	(11,927,000)
Net Cost Basis		1,682,275,000
380 and 420 E Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		156,355,000
Buildings & Improvements		9,229,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		7,418,000
Total Costs
Land		156,355,000
Buildings & Improvements		16,647,000
Total	[1]	173,002,000
Accumulated Depreciation	[2]	(1,556,000)
Net Cost Basis		171,446,000
5, 10, and 15 Necco Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		277,554,000
Buildings & Improvements		55,897,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		73,345,000
Total Costs
Land		277,554,000
Buildings & Improvements		129,242,000
Total	[1]	406,796,000
Accumulated Depreciation	[2]	(3,442,000)
Net Cost Basis		403,354,000
99 A Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		31,671,000
Buildings & Improvements		878,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		15,480,000
Total Costs
Land		31,671,000
Buildings & Improvements		16,358,000
Total	[1]	48,029,000
Accumulated Depreciation	[2]	(938,000)
Net Cost Basis		47,091,000
One Upland Road, 100 Tech Drive, and One Investors Way
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		67,329,000
Buildings & Improvements		301,000,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		3,541,000
Total Costs
Land		67,329,000
Buildings & Improvements		304,541,000
Total	[1]	371,870,000
Accumulated Depreciation	[2]	(16,100,000)
Net Cost Basis		355,770,000
Reservoir Woods
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		88,840,000
Buildings & Improvements		214,038,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		11,440,000
Total Costs
Land		88,840,000
Buildings & Improvements		225,478,000
Total	[1]	314,318,000
Accumulated Depreciation	[2]	(7,139,000)
Net Cost Basis		307,179,000
275 Grove Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		70,476,000
Buildings & Improvements		150,159,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		14,052,000
Total Costs
Land		70,476,000
Buildings & Improvements		164,211,000
Total	[1]	234,687,000
Accumulated Depreciation	[2]	(6,713,000)
Net Cost Basis		227,974,000
Alexandria Park at 128
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		10,439,000
Buildings & Improvements		41,596,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		82,097,000
Total Costs
Land		10,439,000
Buildings & Improvements		123,693,000
Total	[1]	134,132,000
Accumulated Depreciation	[2]	(52,060,000)
Net Cost Basis		82,072,000
225, 266, and 275 Second Avenue
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		17,086,000
Buildings & Improvements		69,994,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		84,475,000
Total Costs
Land		17,086,000
Buildings & Improvements		154,469,000
Total	[1]	171,555,000
Accumulated Depreciation	[2]	(34,655,000)
Net Cost Basis		136,900,000
19 Presidential Way
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		12,833,000
Buildings & Improvements		27,333,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		25,230,000
Total Costs
Land		12,833,000
Buildings & Improvements		52,563,000
Total	[1]	65,396,000
Accumulated Depreciation	[2]	(23,044,000)
Net Cost Basis		42,352,000
840 Winter Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		12,470,000
Buildings & Improvements		44,395,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		23,290,000
Total Costs
Land		12,470,000
Buildings & Improvements		67,685,000
Total	[1]	80,155,000
Accumulated Depreciation	[2]	(1,362,000)
Net Cost Basis		78,793,000
100 Beaver Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,466,000
Buildings & Improvements		9,046,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		26,736,000
Total Costs
Land		1,466,000
Buildings & Improvements		35,782,000
Total	[1]	37,248,000
Accumulated Depreciation	[2]	(10,453,000)
Net Cost Basis		26,795,000
285 Bear Hill Road
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		422,000
Buildings & Improvements		3,538,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		7,094,000
Total Costs
Land		422,000
Buildings & Improvements		10,632,000
Total	[1]	11,054,000
Accumulated Depreciation	[2]	(2,926,000)
Net Cost Basis		8,128,000
111 and 130 Forbes Boulevard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		3,146,000
Buildings & Improvements		15,725,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		4,574,000
Total Costs
Land		3,146,000
Buildings & Improvements		20,299,000
Total	[1]	23,445,000
Accumulated Depreciation	[2]	(7,296,000)
Net Cost Basis		16,149,000
20 Walkup Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		2,261,000
Buildings & Improvements		7,099,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		9,029,000
Total Costs
Land		2,261,000
Buildings & Improvements		16,128,000
Total	[1]	18,389,000
Accumulated Depreciation	[2]	(4,710,000)
Net Cost Basis		13,679,000
Other - Greater Boston
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		7,991,000
Initial Costs
Land		92,156,000
Buildings & Improvements		137,831,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		46,099,000
Total Costs
Land		92,156,000
Buildings & Improvements		183,930,000
Total	[1]	276,086,000
Accumulated Depreciation	[2]	(144,000)
Net Cost Basis		275,942,000
Alexandria Center for Science and Technology - Mission Bay
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		211,450,000
Buildings & Improvements		210,211,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		493,396,000
Total Costs
Land		211,450,000
Buildings & Improvements		703,607,000
Total	[1]	915,057,000
Accumulated Depreciation	[2]	(184,410,000)
Net Cost Basis		730,647,000
Alexandria Technology Center - Gateway
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		193,004,000
Buildings & Improvements		364,078,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		303,215,000
Total Costs
Land		193,004,000
Buildings & Improvements		667,293,000
Total	[1]	860,297,000
Accumulated Depreciation	[2]	(106,956,000)
Net Cost Basis		753,341,000
213, 249, 259, 269, and 279 East Grand Avenue
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		59,199,000
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		545,037,000
Total Costs
Land		59,199,000
Buildings & Improvements		545,037,000
Total	[1]	604,236,000
Accumulated Depreciation	[2]	(91,206,000)
Net Cost Basis		513,030,000
Alexandria Center for Life Science - South San Francisco
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		32,245,000
Buildings & Improvements		1,287,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		458,833,000
Total Costs
Land		32,245,000
Buildings & Improvements		460,120,000
Total	[1]	492,365,000
Accumulated Depreciation	[2]	(71,668,000)
Net Cost Basis		420,697,000
1122 and 1178 El Camino Real
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		231,707,000
Buildings & Improvements		5,224,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		4,370,000
Total Costs
Land		231,707,000
Buildings & Improvements		9,594,000
Total	[1]	241,301,000
Accumulated Depreciation	[2]	(3,000)
Net Cost Basis		241,298,000
500 Forbes Boulevard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		35,596,000
Buildings & Improvements		69,091,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		17,503,000
Total Costs
Land		35,596,000
Buildings & Improvements		86,594,000
Total	[1]	122,190,000
Accumulated Depreciation	[2]	(31,522,000)
Net Cost Basis		90,668,000
7000 Shoreline Court
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		7,038,000
Buildings & Improvements		39,704,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		27,993,000
Total Costs
Land		7,038,000
Buildings & Improvements		67,697,000
Total	[1]	74,735,000
Accumulated Depreciation	[2]	(24,327,000)
Net Cost Basis		50,408,000
341 and 343 Oyster Point Boulevard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		7,038,000
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		44,189,000
Total Costs
Land		7,038,000
Buildings & Improvements		44,189,000
Total	[1]	51,227,000
Accumulated Depreciation	[2]	(21,280,000)
Net Cost Basis		29,947,000
839/863 Mitten Road/866 Malcolm Road
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		3,211,000
Buildings & Improvements		8,665,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		30,162,000
Total Costs
Land		3,211,000
Buildings & Improvements		38,827,000
Total	[1]	42,038,000
Accumulated Depreciation	[2]	(15,731,000)
Net Cost Basis		26,307,000
Alexandria Center for Life Science - San Carlos
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		433,634,000
Buildings & Improvements		28,323,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		601,498,000
Total Costs
Land		433,634,000
Buildings & Improvements		629,821,000
Total	[1]	1,063,455,000
Accumulated Depreciation	[2]	(15,576,000)
Net Cost Basis		1,047,879,000
3825 and 3875 Fabian Way
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		194,424,000
Buildings & Improvements		54,519,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		3,007,000
Total Costs
Land		194,424,000
Buildings & Improvements		57,526,000
Total	[1]	251,950,000
Accumulated Depreciation	[2]	(6,175,000)
Net Cost Basis		245,775,000
Alexandria Stanford Life Science District
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		260,931,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		79,029,000
Total Costs
Land		0
Buildings & Improvements		339,960,000
Total	[1]	339,960,000
Accumulated Depreciation	[2]	(22,084,000)
Net Cost Basis		317,876,000
3330, 3412, 3420, 3440, 3450, and 3460 Hillview Avenue
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		332,257,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		9,730,000
Total Costs
Land		0
Buildings & Improvements		341,987,000
Total	[1]	341,987,000
Accumulated Depreciation	[2]	(7,873,000)
Net Cost Basis		334,114,000
Alexandria PARC
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		72,859,000
Buildings & Improvements		53,309,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		28,972,000
Total Costs
Land		72,859,000
Buildings & Improvements		82,281,000
Total	[1]	155,140,000
Accumulated Depreciation	[2]	(9,575,000)
Net Cost Basis		145,565,000
2475 and 2625/2627/2631 Hanover Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		103,005,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		12,661,000
Total Costs
Land		0
Buildings & Improvements		115,666,000
Total	[1]	115,666,000
Accumulated Depreciation	[2]	(13,257,000)
Net Cost Basis		102,409,000
2425 Garcia Avenue & 2450 Bayshore Parkway
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		678,000
Initial Costs
Land		1,512,000
Buildings & Improvements		21,323,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		26,261,000
Total Costs
Land		1,512,000
Buildings & Improvements		47,584,000
Total	[1]	49,096,000
Accumulated Depreciation	[2]	(25,242,000)
Net Cost Basis		23,854,000
Shoreway Science Center
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		20,049,000
Buildings & Improvements		48,554,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		252,000
Total Costs
Land		20,049,000
Buildings & Improvements		48,806,000
Total	[1]	68,855,000
Accumulated Depreciation	[2]	(3,828,000)
Net Cost Basis		65,027,000
1450 Page Mill Road
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		84,467,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		110,000
Total Costs
Land		0
Buildings & Improvements		84,577,000
Total	[1]	84,577,000
Accumulated Depreciation	[2]	(9,908,000)
Net Cost Basis		74,669,000
3350 West Bayshore Road
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		4,800,000
Buildings & Improvements		6,693,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		38,494,000
Total Costs
Land		4,800,000
Buildings & Improvements		45,187,000
Total	[1]	49,987,000
Accumulated Depreciation	[2]	(7,956,000)
Net Cost Basis		42,031,000
901 California Avenue
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		3,797,000
Total Costs
Land		0
Buildings & Improvements		3,797,000
Total	[1]	3,797,000
Accumulated Depreciation	[2]	0
Net Cost Basis		3,797,000
88 Bluxome Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		148,551,000
Buildings & Improvements		21,514,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		153,615,000
Total Costs
Land		148,551,000
Buildings & Improvements		175,129,000
Total	[1]	323,680,000
Accumulated Depreciation	[2]	(23,098,000)
Net Cost Basis		300,582,000
Other - San Francisco
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		32,111,000
Buildings & Improvements		8,345,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		85,104,000
Total Costs
Land		32,111,000
Buildings & Improvements		93,449,000
Total	[1]	125,560,000
Accumulated Depreciation	[2]	(5,989,000)
Net Cost Basis		119,571,000
Alexandria Center for Life Science - New York City
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,007,571,000
Total Costs
Land		0
Buildings & Improvements		1,007,571,000
Total	[1]	1,007,571,000
Accumulated Depreciation	[2]	(229,709,000)
Net Cost Basis		777,862,000
219 East 42nd Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		141,266,000
Buildings & Improvements		63,312,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		3,363,000
Total Costs
Land		141,266,000
Buildings & Improvements		66,675,000
Total	[1]	207,941,000
Accumulated Depreciation	[2]	(31,730,000)
Net Cost Basis		176,211,000
Alexandria Center for Life Science - Long Island City
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		47,746,000
Buildings & Improvements		53,093,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		112,855,000
Total Costs
Land		47,746,000
Buildings & Improvements		165,948,000
Total	[1]	213,694,000
Accumulated Depreciation	[2]	(2,213,000)
Net Cost Basis		211,481,000
One Alexandria Square
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		247,423,000
Buildings & Improvements		192,755,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		500,972,000
Total Costs
Land		247,423,000
Buildings & Improvements		693,727,000
Total	[1]	941,150,000
Accumulated Depreciation	[2]	(207,633,000)
Net Cost Basis		733,517,000
ARE Torrey Ridge
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		22,124,000
Buildings & Improvements		152,840,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		83,741,000
Total Costs
Land		22,124,000
Buildings & Improvements		236,581,000
Total	[1]	258,705,000
Accumulated Depreciation	[2]	(52,130,000)
Net Cost Basis		206,575,000
ARE Nautilus
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		6,684,000
Buildings & Improvements		27,600,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		124,705,000
Total Costs
Land		6,684,000
Buildings & Improvements		152,305,000
Total	[1]	158,989,000
Accumulated Depreciation	[2]	(61,040,000)
Net Cost Basis		97,949,000
Alexandria Point
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		88,016,000
Buildings & Improvements		393,713,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		482,841,000
Total Costs
Land		88,016,000
Buildings & Improvements		876,554,000
Total	[1]	964,570,000
Accumulated Depreciation	[2]	(159,767,000)
Net Cost Basis		804,803,000
5200 Illumina Way
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		38,340,000
Buildings & Improvements		96,606,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		196,915,000
Total Costs
Land		38,340,000
Buildings & Improvements		293,521,000
Total	[1]	331,861,000
Accumulated Depreciation	[2]	(65,439,000)
Net Cost Basis		266,422,000
University District
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		61,753,000
Buildings & Improvements		49,692,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		219,059,000
Total Costs
Land		61,753,000
Buildings & Improvements		268,751,000
Total	[1]	330,504,000
Accumulated Depreciation	[2]	(104,500,000)
Net Cost Basis		226,004,000
SD Tech by Alexandria
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		81,428,000
Buildings & Improvements		254,069,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		192,032,000
Total Costs
Land		81,428,000
Buildings & Improvements		446,101,000
Total	[1]	527,529,000
Accumulated Depreciation	[2]	(17,119,000)
Net Cost Basis		510,410,000
Sequence District by Alexandria
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		163,610,000
Buildings & Improvements		281,389,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		9,270,000
Total Costs
Land		163,610,000
Buildings & Improvements		290,659,000
Total	[1]	454,269,000
Accumulated Depreciation	[2]	(4,941,000)
Net Cost Basis		449,328,000
Pacific Technology Park
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		96,796,000
Buildings & Improvements		66,660,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		22,112,000
Total Costs
Land		96,796,000
Buildings & Improvements		88,772,000
Total	[1]	185,568,000
Accumulated Depreciation	[2]	(1,205,000)
Net Cost Basis		184,363,000
Summers Ridge Science Park
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		21,154,000
Buildings & Improvements		102,046,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		3,685,000
Total Costs
Land		21,154,000
Buildings & Improvements		105,731,000
Total	[1]	126,885,000
Accumulated Depreciation	[2]	(11,016,000)
Net Cost Basis		115,869,000
ARE Portola
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		6,991,000
Buildings & Improvements		25,153,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		40,038,000
Total Costs
Land		6,991,000
Buildings & Improvements		65,191,000
Total	[1]	72,182,000
Accumulated Depreciation	[2]	(18,338,000)
Net Cost Basis		53,844,000
7330 and 7360 Carroll Road
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		4,674,000
Buildings & Improvements		24,012,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		2,125,000
Total Costs
Land		4,674,000
Buildings & Improvements		26,137,000
Total	[1]	30,811,000
Accumulated Depreciation	[2]	(9,978,000)
Net Cost Basis		20,833,000
5810/5820 Nancy Ridge Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		3,492,000
Buildings & Improvements		18,285,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		32,750,000
Total Costs
Land		3,492,000
Buildings & Improvements		51,035,000
Total	[1]	54,527,000
Accumulated Depreciation	[2]	(11,990,000)
Net Cost Basis		42,537,000
9877 Waples Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		5,092,000
Buildings & Improvements		11,908,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		12,080,000
Total Costs
Land		5,092,000
Buildings & Improvements		23,988,000
Total	[1]	29,080,000
Accumulated Depreciation	[2]	(1,180,000)
Net Cost Basis		27,900,000
5871 Oberlin Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,349,000
Buildings & Improvements		8,016,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		20,320,000
Total Costs
Land		1,349,000
Buildings & Improvements		28,336,000
Total	[1]	29,685,000
Accumulated Depreciation	[2]	(3,103,000)
Net Cost Basis		26,582,000
3911, 3931, 3985, 4025, 4031, 4045, and 4075 Sorrento Valley Boulevard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		18,177,000
Buildings & Improvements		42,723,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		28,584,000
Total Costs
Land		18,177,000
Buildings & Improvements		71,307,000
Total	[1]	89,484,000
Accumulated Depreciation	[2]	(37,143,000)
Net Cost Basis		52,341,000
11025, 11035, 11045, 11055, 11065, and 11075 Roselle Street
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		4,156,000
Buildings & Improvements		11,571,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		46,247,000
Total Costs
Land		4,156,000
Buildings & Improvements		57,818,000
Total	[1]	61,974,000
Accumulated Depreciation	[2]	(16,879,000)
Net Cost Basis		45,095,000
Other - San Diego
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		117,866,000
Buildings & Improvements		155,803,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		79,722,000
Total Costs
Land		117,866,000
Buildings & Improvements		235,525,000
Total	[1]	353,391,000
Accumulated Depreciation	[2]	(28,341,000)
Net Cost Basis		325,050,000
The Eastlake Life Science Campus by Alexandria
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		51,750,000
Buildings & Improvements		83,012,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		707,183,000
Total Costs
Land		51,750,000
Buildings & Improvements		790,195,000
Total	[1]	841,945,000
Accumulated Depreciation	[2]	(175,538,000)
Net Cost Basis		666,407,000
Alexandria Center at South Lake Union
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		76,070,000
Buildings & Improvements		1,128,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		288,917,000
Total Costs
Land		76,070,000
Buildings & Improvements		290,045,000
Total	[1]	366,115,000
Accumulated Depreciation	[2]	(38,986,000)
Net Cost Basis		327,129,000
219 Terry Avenue North
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,819,000
Buildings & Improvements		2,302,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		20,166,000
Total Costs
Land		1,819,000
Buildings & Improvements		22,468,000
Total	[1]	24,287,000
Accumulated Depreciation	[2]	(8,686,000)
Net Cost Basis		15,601,000
830 4th Avenue South
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		6,500,000
Buildings & Improvements		12,062,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,656,000
Total Costs
Land		6,500,000
Buildings & Improvements		13,718,000
Total	[1]	20,218,000
Accumulated Depreciation	[2]	(358,000)
Net Cost Basis		19,860,000
3000/3018 Western Avenue
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,432,000
Buildings & Improvements		7,497,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		24,583,000
Total Costs
Land		1,432,000
Buildings & Improvements		32,080,000
Total	[1]	33,512,000
Accumulated Depreciation	[2]	(22,314,000)
Net Cost Basis		11,198,000
410 West Harrison/410 Elliott Avenue West
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		3,857,000
Buildings & Improvements		1,989,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		17,559,000
Total Costs
Land		3,857,000
Buildings & Improvements		19,548,000
Total	[1]	23,405,000
Accumulated Depreciation	[2]	(6,765,000)
Net Cost Basis		16,640,000
1010 4th Avenue South
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		46,200,000
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		5,195,000
Total Costs
Land		46,200,000
Buildings & Improvements		5,195,000
Total	[1]	51,395,000
Accumulated Depreciation	[2]	0
Net Cost Basis		51,395,000
Other - Seattle
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		245,754,000
Buildings & Improvements		224,600,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		18,153,000
Total Costs
Land		245,754,000
Buildings & Improvements		242,753,000
Total	[1]	488,507,000
Accumulated Depreciation	[2]	(4,120,000)
Net Cost Basis		484,387,000
Alexandria Center for Life Science - Shady Grove
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		88,157,000
Buildings & Improvements		261,626,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		311,686,000
Total Costs
Land		88,157,000
Buildings & Improvements		573,312,000
Total	[1]	661,469,000
Accumulated Depreciation	[2]	(113,427,000)
Net Cost Basis		548,042,000
1330 Piccard Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		2,800,000
Buildings & Improvements		11,533,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		36,302,000
Total Costs
Land		2,800,000
Buildings & Improvements		47,835,000
Total	[1]	50,635,000
Accumulated Depreciation	[2]	(22,015,000)
Net Cost Basis		28,620,000
1405 and 1450 Research Boulevard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		2,788,000
Buildings & Improvements		24,507,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		10,988,000
Total Costs
Land		2,788,000
Buildings & Improvements		35,495,000
Total	[1]	38,283,000
Accumulated Depreciation	[2]	(17,324,000)
Net Cost Basis		20,959,000
1500 and 1550 East Gude Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,523,000
Buildings & Improvements		7,731,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		10,485,000
Total Costs
Land		1,523,000
Buildings & Improvements		18,216,000
Total	[1]	19,739,000
Accumulated Depreciation	[2]	(10,247,000)
Net Cost Basis		9,492,000
5 Research Place
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,466,000
Buildings & Improvements		5,708,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		30,706,000
Total Costs
Land		1,466,000
Buildings & Improvements		36,414,000
Total	[1]	37,880,000
Accumulated Depreciation	[2]	(17,079,000)
Net Cost Basis		20,801,000
5 Research Court
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,647,000
Buildings & Improvements		13,258,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		24,099,000
Total Costs
Land		1,647,000
Buildings & Improvements		37,357,000
Total	[1]	39,004,000
Accumulated Depreciation	[2]	(16,591,000)
Net Cost Basis		22,413,000
12301 Parklawn Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,476,000
Buildings & Improvements		7,267,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,697,000
Total Costs
Land		1,476,000
Buildings & Improvements		8,964,000
Total	[1]	10,440,000
Accumulated Depreciation	[2]	(3,388,000)
Net Cost Basis		7,052,000
Alexandria Technology Center - Gaithersburg I
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		20,980,000
Buildings & Improvements		121,952,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		49,525,000
Total Costs
Land		20,980,000
Buildings & Improvements		171,477,000
Total	[1]	192,457,000
Accumulated Depreciation	[2]	(49,941,000)
Net Cost Basis		142,516,000
Alexandria Technology Center - Gaithersburg II
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		17,134,000
Buildings & Improvements		67,825,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		101,016,000
Total Costs
Land		17,134,000
Buildings & Improvements		168,841,000
Total	[1]	185,975,000
Accumulated Depreciation	[2]	(36,064,000)
Net Cost Basis		149,911,000
20400 Century Boulevard
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		3,641,000
Buildings & Improvements		4,759,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		7,817,000
Total Costs
Land		3,641,000
Buildings & Improvements		12,576,000
Total	[1]	16,217,000
Accumulated Depreciation	[2]	0
Net Cost Basis		16,217,000
401 Professional Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,129,000
Buildings & Improvements		6,941,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		11,130,000
Total Costs
Land		1,129,000
Buildings & Improvements		18,071,000
Total	[1]	19,200,000
Accumulated Depreciation	[2]	(8,602,000)
Net Cost Basis		10,598,000
950 Wind River Lane
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		2,400,000
Buildings & Improvements		10,620,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,050,000
Total Costs
Land		2,400,000
Buildings & Improvements		11,670,000
Total	[1]	14,070,000
Accumulated Depreciation	[2]	(3,919,000)
Net Cost Basis		10,151,000
620 Professional Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		784,000
Buildings & Improvements		4,705,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		8,235,000
Total Costs
Land		784,000
Buildings & Improvements		12,940,000
Total	[1]	13,724,000
Accumulated Depreciation	[2]	(7,165,000)
Net Cost Basis		6,559,000
8000/9000/10000 Virginia Manor Road
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		13,679,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		10,238,000
Total Costs
Land		0
Buildings & Improvements		23,917,000
Total	[1]	23,917,000
Accumulated Depreciation	[2]	(11,662,000)
Net Cost Basis		12,255,000
14225 Newbrook Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		4,800,000
Buildings & Improvements		27,639,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		22,535,000
Total Costs
Land		4,800,000
Buildings & Improvements		50,174,000
Total	[1]	54,974,000
Accumulated Depreciation	[2]	(19,918,000)
Net Cost Basis		35,056,000
Alexandria Center for Life Science - Durham
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		90,686,000
Buildings & Improvements		471,263,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		128,949,000
Total Costs
Land		90,686,000
Buildings & Improvements		600,212,000
Total	[1]	690,898,000
Accumulated Depreciation	[2]	(14,556,000)
Net Cost Basis		676,342,000
Alexandria Center for Advanced Technologies
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		27,784,000
Buildings & Improvements		16,958,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		138,532,000
Total Costs
Land		27,784,000
Buildings & Improvements		155,490,000
Total	[1]	183,274,000
Accumulated Depreciation	[2]	(14,375,000)
Net Cost Basis		168,899,000
Alexandria Center for AgTech
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		2,801,000
Buildings & Improvements		6,756,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		180,881,000
Total Costs
Land		2,801,000
Buildings & Improvements		187,637,000
Total	[1]	190,438,000
Accumulated Depreciation	[2]	(9,807,000)
Net Cost Basis		180,631,000
Alexandria Technology Center - Alston
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,430,000
Buildings & Improvements		17,482,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		32,662,000
Total Costs
Land		1,430,000
Buildings & Improvements		50,144,000
Total	[1]	51,574,000
Accumulated Depreciation	[2]	(26,489,000)
Net Cost Basis		25,085,000
108/110/112/114 Alexander Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		376,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		44,943,000
Total Costs
Land		0
Buildings & Improvements		45,319,000
Total	[1]	45,319,000
Accumulated Depreciation	[2]	(22,969,000)
Net Cost Basis		22,350,000
Alexandria Innovation Center - Research Triangle
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,065,000
Buildings & Improvements		21,218,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		30,583,000
Total Costs
Land		1,065,000
Buildings & Improvements		51,801,000
Total	[1]	52,866,000
Accumulated Depreciation		(22,564,000)
Net Cost Basis		30,302,000
7 Triangle Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		701,000
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		32,612,000
Total Costs
Land		701,000
Buildings & Improvements		32,612,000
Total	[1]	33,313,000
Accumulated Depreciation	[2]	(9,084,000)
Net Cost Basis		24,229,000
2525 East NC Highway 54
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		713,000
Buildings & Improvements		12,827,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		20,700,000
Total Costs
Land		713,000
Buildings & Improvements		33,527,000
Total	[1]	34,240,000
Accumulated Depreciation		(13,280,000)
Net Cost Basis		20,960,000
407 Davis Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		1,229,000
Buildings & Improvements		17,733,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,028,000
Total Costs
Land		1,229,000
Buildings & Improvements		18,761,000
Total	[1]	19,990,000
Accumulated Depreciation	[2]	(4,609,000)
Net Cost Basis		15,381,000
601 Keystone Park Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		785,000
Buildings & Improvements		11,546,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		7,314,000
Total Costs
Land		785,000
Buildings & Improvements		18,860,000
Total	[1]	19,645,000
Accumulated Depreciation	[2]	(7,211,000)
Net Cost Basis		12,434,000
6040 George Watts Hill Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		27,900,000
Total Costs
Land		0
Buildings & Improvements		27,900,000
Total	[1]	27,900,000
Accumulated Depreciation	[2]	(4,725,000)
Net Cost Basis		23,175,000
5 Triangle Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		161,000
Buildings & Improvements		3,409,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		12,678,000
Total Costs
Land		161,000
Buildings & Improvements		16,087,000
Total	[1]	16,248,000
Accumulated Depreciation	[2]	(7,230,000)
Net Cost Basis		9,018,000
6101 Quadrangle Drive
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		951,000
Buildings & Improvements		3,982,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		11,419,000
Total Costs
Land		951,000
Buildings & Improvements		15,401,000
Total	[1]	16,352,000
Accumulated Depreciation	[2]	(4,161,000)
Net Cost Basis		12,191,000
Alexandria Center for NextGen Medicines
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		94,184,000
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		1,872,000
Total Costs
Land		94,184,000
Buildings & Improvements		1,872,000
Total	[1]	96,056,000
Accumulated Depreciation	[2]	0
Net Cost Basis		96,056,000
Canada
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		22,801,000
Buildings & Improvements		99,693,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		15,410,000
Total Costs
Land		22,801,000
Buildings & Improvements		115,103,000
Total	[1]	137,904,000
Accumulated Depreciation	[2]	(29,408,000)
Net Cost Basis		108,496,000
Various
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		200,590,000
Buildings & Improvements		265,065,000
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		237,136,000
Total Costs
Land		200,590,000
Buildings & Improvements		502,201,000
Total	[1]	702,791,000
Accumulated Depreciation	[2]	(52,503,000)
Net Cost Basis		650,288,000
China
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation
Encumbrances		0
Initial Costs
Land		0
Buildings & Improvements		0
Costs Capitalized Subsequent to Acquisition
Buildings & Improvements		18,802,000
Total Costs
Land		0
Buildings & Improvements		18,802,000
Total	[1]	18,802,000
Accumulated Depreciation	[2]	(4,483,000)
Net Cost Basis		$ 14,319,000

[1] As of December 31, 2021, the total cost of our real estate assets aggregated $28.8 billion, which was less than the cost of real estate for federal income tax purposes aggregating $29.3 billion by approximately $578.4 million.

[2] The depreciable life ranges up to 40 years for buildings and improvements, up to 20 years for land improvements, and the term of the respective lease for tenant improvements.