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Schedule III - Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | $ 149,908 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 7,815,474 |  |  |  |
Buildings & Improvements |  | 9,982,177 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 19,937,567 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 7,815,474 |  |  |  |
Buildings & Improvements |  | 29,919,744 |  |  |  |
Total |  | 37,735,218 | [1] | $ 36,618,530 | $ 34,299,503 | $ 28,751,910
Accumulated Depreciation |  | (5,625,179) | [2] | $ (4,985,019) | $ (4,354,063) | $ (3,771,241)
Net Cost Basis |  | 32,110,039 |  |  |  |
Investment in Real Estate, Federal Income Tax Basis |  | 37,200,000 |  |  |  |
Investment in real estate over cost basis of real estate for federal income tax purpose |  | $ 489,400 |  |  |  |
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 |  | $ 149,908 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 7,815,474 |  |  |  |
Buildings & Improvements |  | 9,982,177 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 19,933,412 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 7,815,474 |  |  |  |
Buildings & Improvements |  | 29,915,589 |  |  |  |
Total | [1] | 37,731,063 |  |  |  |
Accumulated Depreciation | [2] | (5,621,024) |  |  |  |
Net Cost Basis |  | 32,110,039 |  |  |  |
Alexandria Center at Kendall Square |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 558,885 |  |  |  |
Buildings & Improvements |  | 783,224 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 1,792,818 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 558,885 |  |  |  |
Buildings & Improvements |  | 2,576,042 |  |  |  |
Total | [1] | 3,134,927 |  |  |  |
Accumulated Depreciation | [2] | (465,409) |  |  |  |
Net Cost Basis |  | 2,669,518 |  |  |  |
Alexandria Center at One Kendall Square |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 405,164 |  |  |  |
Buildings & Improvements |  | 576,213 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 1,200,230 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 405,164 |  |  |  |
Buildings & Improvements |  | 1,776,443 |  |  |  |
Total | [1] | 2,181,607 |  |  |  |
Accumulated Depreciation | [2] | (289,414) |  |  |  |
Net Cost Basis |  | 1,892,193 |  |  |  |
Alexandria Technology Square |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 619,658 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 305,387 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 925,045 |  |  |  |
Total | [1] | 925,045 |  |  |  |
Accumulated Depreciation | [2] | (394,582) |  |  |  |
Net Cost Basis |  | 530,463 |  |  |  |
The Arsenal on the Charles |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 191,797 |  |  |  |
Buildings & Improvements |  | 354,611 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 776,601 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 191,797 |  |  |  |
Buildings & Improvements |  | 1,131,212 |  |  |  |
Total | [1] | 1,323,009 |  |  |  |
Accumulated Depreciation | [2] | (116,965) |  |  |  |
Net Cost Basis |  | 1,206,044 |  |  |  |
480 Arsenal Way and 446, 458, 500, and 550 Arsenal Way |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 149,321 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 164,658 |  |  |  |
Buildings & Improvements |  | 24,464 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 431,701 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 164,658 |  |  |  |
Buildings & Improvements |  | 456,165 |  |  |  |
Total | [1] | 620,823 |  |  |  |
Accumulated Depreciation | [2] | (85,681) |  |  |  |
Net Cost Basis |  | 535,142 |  |  |  |
Alexandria Center for Life Science - Fenway |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 912,016 |  |  |  |
Buildings & Improvements |  | 617,552 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 797,446 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 912,016 |  |  |  |
Buildings & Improvements |  | 1,414,998 |  |  |  |
Total | [1] | 2,327,014 |  |  |  |
Accumulated Depreciation | [2] | (91,870) |  |  |  |
Net Cost Basis |  | 2,235,144 |  |  |  |
285, 299, 307, and 345 Dorchester Avenue |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 264,554 |  |  |  |
Buildings & Improvements |  | 0 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 22,917 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 264,554 |  |  |  |
Buildings & Improvements |  | 22,917 |  |  |  |
Total | [1] | 287,471 |  |  |  |
Accumulated Depreciation | [2] | 0 |  |  |  |
Net Cost Basis |  | 287,471 |  |  |  |
5, 10, and 15 Necco Street |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 277,554 |  |  |  |
Buildings & Improvements |  | 55,897 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 411,062 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 277,554 |  |  |  |
Buildings & Improvements |  | 466,959 |  |  |  |
Total | [1] | 744,513 |  |  |  |
Accumulated Depreciation | [2] | (19,786) |  |  |  |
Net Cost Basis |  | 724,727 |  |  |  |
Alexandria Center for Life Science - Waltham |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 141,629 |  |  |  |
Buildings & Improvements |  | 513,901 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 359,436 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 141,629 |  |  |  |
Buildings & Improvements |  | 873,337 |  |  |  |
Total | [1] | 1,014,966 |  |  |  |
Accumulated Depreciation | [2] | (30,015) |  |  |  |
Net Cost Basis |  | 984,951 |  |  |  |
19, 215, 225, and 235 Presidential Way |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 32,136 |  |  |  |
Buildings & Improvements |  | 118,391 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 29,014 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 32,136 |  |  |  |
Buildings & Improvements |  | 147,405 |  |  |  |
Total | [1] | 179,541 |  |  |  |
Accumulated Depreciation | [2] | (36,009) |  |  |  |
Net Cost Basis |  | 143,532 |  |  |  |
Other - Greater Boston |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 156,221 |  |  |  |
Buildings & Improvements |  | 187,205 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 89,097 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 156,221 |  |  |  |
Buildings & Improvements |  | 276,302 |  |  |  |
Total | [1] | 432,523 |  |  |  |
Accumulated Depreciation | [2] | (5,331) |  |  |  |
Net Cost Basis |  | 427,192 |  |  |  |
Alexandria Center for Science and Technology - Mission Bay |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 213,014 |  |  |  |
Buildings & Improvements |  | 218,556 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 703,020 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 213,014 |  |  |  |
Buildings & Improvements |  | 921,576 |  |  |  |
Total | [1] | 1,134,590 |  |  |  |
Accumulated Depreciation | [2] | (252,874) |  |  |  |
Net Cost Basis |  | 881,716 |  |  |  |
Alexandria Technology Center - Gateway |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 193,004 |  |  |  |
Buildings & Improvements |  | 364,078 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 763,530 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 193,004 |  |  |  |
Buildings & Improvements |  | 1,127,608 |  |  |  |
Total | [1] | 1,320,612 |  |  |  |
Accumulated Depreciation | [2] | (209,196) |  |  |  |
Net Cost Basis |  | 1,111,416 |  |  |  |
Alexandria Center for Life Science – Millbrae |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 69,989 |  |  |  |
Buildings & Improvements |  | 0 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 490,449 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 69,989 |  |  |  |
Buildings & Improvements |  | 490,449 |  |  |  |
Total | [1] | 560,438 |  |  |  |
Accumulated Depreciation | [2] | 0 |  |  |  |
Net Cost Basis |  | 560,438 |  |  |  |
Alexandria Center for Advanced Technologies - South San Francisco |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 59,199 |  |  |  |
Buildings & Improvements |  | 0 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 565,673 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 59,199 |  |  |  |
Buildings & Improvements |  | 565,673 |  |  |  |
Total | [1] | 624,872 |  |  |  |
Accumulated Depreciation | [2] | (151,635) |  |  |  |
Net Cost Basis |  | 473,237 |  |  |  |
Alexandria Center for Advanced Technologies - Tanforan |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 330,154 |  |  |  |
Buildings & Improvements |  | 51,145 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 80,707 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 330,154 |  |  |  |
Buildings & Improvements |  | 131,852 |  |  |  |
Total | [1] | 462,006 |  |  |  |
Accumulated Depreciation | [2] | (17,465) |  |  |  |
Net Cost Basis |  | 444,541 |  |  |  |
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 |  |  |  |
Buildings & Improvements |  | 1,287 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 487,452 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 32,245 |  |  |  |
Buildings & Improvements |  | 488,739 |  |  |  |
Total | [1] | 520,984 |  |  |  |
Accumulated Depreciation | [2] | (167,608) |  |  |  |
Net Cost Basis |  | 353,376 |  |  |  |
500 Forbes Boulevard |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 35,596 |  |  |  |
Buildings & Improvements |  | 69,091 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 23,748 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 35,596 |  |  |  |
Buildings & Improvements |  | 92,839 |  |  |  |
Total | [1] | 128,435 |  |  |  |
Accumulated Depreciation | [2] | (38,068) |  |  |  |
Net Cost Basis |  | 90,367 |  |  |  |
Alexandria Center for Life Science - San Carlos |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 433,634 |  |  |  |
Buildings & Improvements |  | 28,323 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 759,478 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 433,634 |  |  |  |
Buildings & Improvements |  | 787,801 |  |  |  |
Total | [1] | 1,221,435 |  |  |  |
Accumulated Depreciation | [2] | (121,222) |  |  |  |
Net Cost Basis |  | 1,100,213 |  |  |  |
Alexandria Stanford Life Science District |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 599,401 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 113,748 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 713,149 |  |  |  |
Total | [1] | 713,149 |  |  |  |
Accumulated Depreciation | [2] | (117,277) |  |  |  |
Net Cost Basis |  | 595,872 |  |  |  |
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 |  | 304,318 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 101,390 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 405,708 |  |  |  |
Total | [1] | 405,708 |  |  |  |
Accumulated Depreciation | [2] | (28,201) |  |  |  |
Net Cost Basis |  | 377,507 |  |  |  |
3825 and 3875 Fabian Way |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 194,424 |  |  |  |
Buildings & Improvements |  | 54,519 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 24,262 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 194,424 |  |  |  |
Buildings & Improvements |  | 78,781 |  |  |  |
Total | [1] | 273,205 |  |  |  |
Accumulated Depreciation | [2] | (13,885) |  |  |  |
Net Cost Basis |  | 259,320 |  |  |  |
2475 and 2625/2627/2631 Hanover Street and 1450 Page Mill Road |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 187,472 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 13,683 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 201,155 |  |  |  |
Total | [1] | 201,155 |  |  |  |
Accumulated Depreciation | [2] | (38,735) |  |  |  |
Net Cost Basis |  | 162,420 |  |  |  |
2100, 2200, 2300, and 2400 Geng Road |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 72,859 |  |  |  |
Buildings & Improvements |  | 53,309 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 42,129 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 72,859 |  |  |  |
Buildings & Improvements |  | 95,438 |  |  |  |
Total | [1] | 168,297 |  |  |  |
Accumulated Depreciation | [2] | (23,335) |  |  |  |
Net Cost Basis |  | 144,962 |  |  |  |
3350 West Bayshore Road |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 4,800 |  |  |  |
Buildings & Improvements |  | 6,693 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 45,196 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 4,800 |  |  |  |
Buildings & Improvements |  | 51,889 |  |  |  |
Total | [1] | 56,689 |  |  |  |
Accumulated Depreciation | [2] | (16,948) |  |  |  |
Net Cost Basis |  | 39,741 |  |  |  |
88 Bluxome Street |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 148,551 |  |  |  |
Buildings & Improvements |  | 21,514 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 227,887 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 148,551 |  |  |  |
Buildings & Improvements |  | 249,401 |  |  |  |
Total | [1] | 397,952 |  |  |  |
Accumulated Depreciation | [2] | (23,098) |  |  |  |
Net Cost Basis |  | 374,854 |  |  |  |
One Alexandria Square |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 140,318 |  |  |  |
Buildings & Improvements |  | 161,293 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 948,146 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 140,318 |  |  |  |
Buildings & Improvements |  | 1,109,439 |  |  |  |
Total | [1] | 1,249,757 |  |  |  |
Accumulated Depreciation | [2] | (274,785) |  |  |  |
Net Cost Basis |  | 974,972 |  |  |  |
ARE Torrey Ridge |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 22,124 |  |  |  |
Buildings & Improvements |  | 152,840 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 109,164 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 22,124 |  |  |  |
Buildings & Improvements |  | 262,004 |  |  |  |
Total | [1] | 284,128 |  |  |  |
Accumulated Depreciation | [2] | (80,763) |  |  |  |
Net Cost Basis |  | 203,365 |  |  |  |
ARE Nautilus |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 6,684 |  |  |  |
Buildings & Improvements |  | 27,600 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 142,569 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 6,684 |  |  |  |
Buildings & Improvements |  | 170,169 |  |  |  |
Total | [1] | 176,853 |  |  |  |
Accumulated Depreciation | [2] | (77,155) |  |  |  |
Net Cost Basis |  | 99,698 |  |  |  |
One Alexandria North |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 103,937 |  |  |  |
Buildings & Improvements |  | 1,354 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 49,172 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 103,937 |  |  |  |
Buildings & Improvements |  | 50,526 |  |  |  |
Total | [1] | 154,463 |  |  |  |
Accumulated Depreciation | [2] | (1,359) |  |  |  |
Net Cost Basis |  | 153,104 |  |  |  |
Campus Point by Alexandria |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 119,760 |  |  |  |
Buildings & Improvements |  | 395,527 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 996,383 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 119,760 |  |  |  |
Buildings & Improvements |  | 1,391,910 |  |  |  |
Total | [1] | 1,511,670 |  |  |  |
Accumulated Depreciation | [2] | (245,906) |  |  |  |
Net Cost Basis |  | 1,265,764 |  |  |  |
5200 Illumina Way |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 39,051 |  |  |  |
Buildings & Improvements |  | 96,606 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 200,123 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 39,051 |  |  |  |
Buildings & Improvements |  | 296,729 |  |  |  |
Total | [1] | 335,780 |  |  |  |
Accumulated Depreciation | [2] | (90,245) |  |  |  |
Net Cost Basis |  | 245,535 |  |  |  |
9625 Towne Centre Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 7,686 |  |  |  |
Buildings & Improvements |  | 13,748 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 66,703 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 7,686 |  |  |  |
Buildings & Improvements |  | 80,451 |  |  |  |
Total | [1] | 88,137 |  |  |  |
Accumulated Depreciation | [2] | (31,002) |  |  |  |
Net Cost Basis |  | 57,135 |  |  |  |
SD Tech by Alexandria |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 76,820 |  |  |  |
Buildings & Improvements |  | 248,969 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 532,373 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 76,820 |  |  |  |
Buildings & Improvements |  | 781,342 |  |  |  |
Total | [1] | 858,162 |  |  |  |
Accumulated Depreciation | [2] | (57,256) |  |  |  |
Net Cost Basis |  | 800,906 |  |  |  |
Sequence District by Alexandria |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 163,610 |  |  |  |
Buildings & Improvements |  | 281,389 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 34,644 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 163,610 |  |  |  |
Buildings & Improvements |  | 316,033 |  |  |  |
Total | [1] | 479,643 |  |  |  |
Accumulated Depreciation | [2] | (27,741) |  |  |  |
Net Cost Basis |  | 451,902 |  |  |  |
Pacific Technology Park |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 96,796 |  |  |  |
Buildings & Improvements |  | 66,660 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 5,033 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 96,796 |  |  |  |
Buildings & Improvements |  | 71,693 |  |  |  |
Total | [1] | 168,489 |  |  |  |
Accumulated Depreciation | [2] | (5,889) |  |  |  |
Net Cost Basis |  | 162,600 |  |  |  |
Summers Ridge Science Park |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 21,154 |  |  |  |
Buildings & Improvements |  | 102,046 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 4,816 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 21,154 |  |  |  |
Buildings & Improvements |  | 106,862 |  |  |  |
Total | [1] | 128,016 |  |  |  |
Accumulated Depreciation | [2] | (19,699) |  |  |  |
Net Cost Basis |  | 108,317 |  |  |  |
Scripps Science Park by Alexandria |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 35,420 |  |  |  |
Buildings & Improvements |  | 43,767 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 85,252 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 35,420 |  |  |  |
Buildings & Improvements |  | 129,019 |  |  |  |
Total | [1] | 164,439 |  |  |  |
Accumulated Depreciation | [2] | (9,419) |  |  |  |
Net Cost Basis |  | 155,020 |  |  |  |
ARE Portola |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 6,991 |  |  |  |
Buildings & Improvements |  | 25,153 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 41,671 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 6,991 |  |  |  |
Buildings & Improvements |  | 66,824 |  |  |  |
Total | [1] | 73,815 |  |  |  |
Accumulated Depreciation | [2] | (27,649) |  |  |  |
Net Cost Basis |  | 46,166 |  |  |  |
5810/5820 Nancy Ridge Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 3,492 |  |  |  |
Buildings & Improvements |  | 18,285 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 33,648 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 3,492 |  |  |  |
Buildings & Improvements |  | 51,933 |  |  |  |
Total | [1] | 55,425 |  |  |  |
Accumulated Depreciation | [2] | (22,090) |  |  |  |
Net Cost Basis |  | 33,335 |  |  |  |
9877 Waples Street |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 5,092 |  |  |  |
Buildings & Improvements |  | 11,908 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 13,289 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 5,092 |  |  |  |
Buildings & Improvements |  | 25,197 |  |  |  |
Total | [1] | 30,289 |  |  |  |
Accumulated Depreciation | [2] | (10,990) |  |  |  |
Net Cost Basis |  | 19,299 |  |  |  |
5871 Oberlin Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,349 |  |  |  |
Buildings & Improvements |  | 8,016 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 20,610 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,349 |  |  |  |
Buildings & Improvements |  | 28,626 |  |  |  |
Total | [1] | 29,975 |  |  |  |
Accumulated Depreciation | [2] | (6,058) |  |  |  |
Net Cost Basis |  | 23,917 |  |  |  |
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 |  |  |  |
Buildings & Improvements |  | 42,723 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 44,918 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 18,177 |  |  |  |
Buildings & Improvements |  | 87,641 |  |  |  |
Total | [1] | 105,818 |  |  |  |
Accumulated Depreciation | [2] | (44,128) |  |  |  |
Net Cost Basis |  | 61,690 |  |  |  |
11045 and 11055 Roselle Street |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,386 |  |  |  |
Buildings & Improvements |  | 4,288 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 34,110 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,386 |  |  |  |
Buildings & Improvements |  | 38,398 |  |  |  |
Total | [1] | 39,784 |  |  |  |
Accumulated Depreciation | [2] | (12,572) |  |  |  |
Net Cost Basis |  | 27,212 |  |  |  |
Other - San Diego |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 104,027 |  |  |  |
Buildings & Improvements |  | 70,212 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 66,352 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 104,027 |  |  |  |
Buildings & Improvements |  | 136,564 |  |  |  |
Total | [1] | 240,591 |  |  |  |
Accumulated Depreciation | [2] | (17,047) |  |  |  |
Net Cost Basis |  | 223,544 |  |  |  |
The Eastlake Life Science Campus by Alexandria |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 46,300 |  |  |  |
Buildings & Improvements |  | 83,012 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 933,691 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 46,300 |  |  |  |
Buildings & Improvements |  | 1,016,703 |  |  |  |
Total | [1] | 1,063,003 |  |  |  |
Accumulated Depreciation | [2] | (267,005) |  |  |  |
Net Cost Basis |  | 795,998 |  |  |  |
Alexandria Center for Life Science - South Lake Union |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 243,959 |  |  |  |
Buildings & Improvements |  | 28,950 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 511,473 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 243,959 |  |  |  |
Buildings & Improvements |  | 540,423 |  |  |  |
Total | [1] | 784,382 |  |  |  |
Accumulated Depreciation | [2] | (58,962) |  |  |  |
Net Cost Basis |  | 725,420 |  |  |  |
219 Terry Avenue North |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,819 |  |  |  |
Buildings & Improvements |  | 2,302 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 23,127 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,819 |  |  |  |
Buildings & Improvements |  | 25,429 |  |  |  |
Total | [1] | 27,248 |  |  |  |
Accumulated Depreciation | [2] | (11,598) |  |  |  |
Net Cost Basis |  | 15,650 |  |  |  |
1010 4th Avenue South |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 46,200 |  |  |  |
Buildings & Improvements |  | 0 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 13,796 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 46,200 |  |  |  |
Buildings & Improvements |  | 13,796 |  |  |  |
Total | [1] | 59,996 |  |  |  |
Accumulated Depreciation | [2] | 0 |  |  |  |
Net Cost Basis |  | 59,996 |  |  |  |
410 West Harrison/410 Elliott Avenue West |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 3,857 |  |  |  |
Buildings & Improvements |  | 1,989 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 20,788 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 3,857 |  |  |  |
Buildings & Improvements |  | 22,777 |  |  |  |
Total | [1] | 26,634 |  |  |  |
Accumulated Depreciation | [2] | (11,367) |  |  |  |
Net Cost Basis |  | 15,267 |  |  |  |
Alexandria Center for Advanced Technologies - Canyon Park |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 133,558 |  |  |  |
Buildings & Improvements |  | 206,374 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 22,001 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 133,558 |  |  |  |
Buildings & Improvements |  | 228,375 |  |  |  |
Total | [1] | 361,933 |  |  |  |
Accumulated Depreciation | [2] | (22,391) |  |  |  |
Net Cost Basis |  | 339,542 |  |  |  |
Alexandria Center for Advanced Technologies - Monte Villa Parkway |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 52,464 |  |  |  |
Buildings & Improvements |  | 64,753 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 89,543 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 52,464 |  |  |  |
Buildings & Improvements |  | 154,296 |  |  |  |
Total | [1] | 206,760 |  |  |  |
Accumulated Depreciation | [2] | (8,280) |  |  |  |
Net Cost Basis |  | 198,480 |  |  |  |
Other - Seattle |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 108,900 |  |  |  |
Buildings & Improvements |  | 931 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 34,311 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 108,900 |  |  |  |
Buildings & Improvements |  | 35,242 |  |  |  |
Total | [1] | 144,142 |  |  |  |
Accumulated Depreciation | [2] | (1,070) |  |  |  |
Net Cost Basis |  | 143,072 |  |  |  |
Alexandria Center for Life Science - Shady Grove |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 85,365 |  |  |  |
Buildings & Improvements |  | 253,567 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 770,709 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 85,365 |  |  |  |
Buildings & Improvements |  | 1,024,276 |  |  |  |
Total | [1] | 1,109,641 |  |  |  |
Accumulated Depreciation | [2] | (177,208) |  |  |  |
Net Cost Basis |  | 932,433 |  |  |  |
1330 Piccard Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 2,800 |  |  |  |
Buildings & Improvements |  | 11,533 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 38,404 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 2,800 |  |  |  |
Buildings & Improvements |  | 49,937 |  |  |  |
Total | [1] | 52,737 |  |  |  |
Accumulated Depreciation | [2] | (26,693) |  |  |  |
Net Cost Basis |  | 26,044 |  |  |  |
1405 Research Boulevard |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 899 |  |  |  |
Buildings & Improvements |  | 21,946 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 16,056 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 899 |  |  |  |
Buildings & Improvements |  | 38,002 |  |  |  |
Total | [1] | 38,901 |  |  |  |
Accumulated Depreciation | [2] | (20,386) |  |  |  |
Net Cost Basis |  | 18,515 |  |  |  |
1500 and 1550 East Gude Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,523 |  |  |  |
Buildings & Improvements |  | 7,731 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 10,713 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,523 |  |  |  |
Buildings & Improvements |  | 18,444 |  |  |  |
Total | [1] | 19,967 |  |  |  |
Accumulated Depreciation | [2] | (12,754) |  |  |  |
Net Cost Basis |  | 7,213 |  |  |  |
5 Research Place |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,466 |  |  |  |
Buildings & Improvements |  | 5,708 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 31,457 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,466 |  |  |  |
Buildings & Improvements |  | 37,165 |  |  |  |
Total | [1] | 38,631 |  |  |  |
Accumulated Depreciation | [2] | (20,626) |  |  |  |
Net Cost Basis |  | 18,005 |  |  |  |
5 Research Court |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,647 |  |  |  |
Buildings & Improvements |  | 13,258 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 24,152 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,647 |  |  |  |
Buildings & Improvements |  | 37,410 |  |  |  |
Total | [1] | 39,057 |  |  |  |
Accumulated Depreciation | [2] | (19,916) |  |  |  |
Net Cost Basis |  | 19,141 |  |  |  |
12301 Parklawn Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,476 |  |  |  |
Buildings & Improvements |  | 7,267 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 1,741 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,476 |  |  |  |
Buildings & Improvements |  | 9,008 |  |  |  |
Total | [1] | 10,484 |  |  |  |
Accumulated Depreciation | [2] | (4,767) |  |  |  |
Net Cost Basis |  | 5,717 |  |  |  |
Alexandria Technology Center - Gaithersburg I |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 20,980 |  |  |  |
Buildings & Improvements |  | 121,952 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 63,723 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 20,980 |  |  |  |
Buildings & Improvements |  | 185,675 |  |  |  |
Total | [1] | 206,655 |  |  |  |
Accumulated Depreciation | [2] | (65,594) |  |  |  |
Net Cost Basis |  | 141,061 |  |  |  |
Alexandria Technology Center - Gaithersburg II |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 17,134 |  |  |  |
Buildings & Improvements |  | 67,825 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 110,446 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 17,134 |  |  |  |
Buildings & Improvements |  | 178,271 |  |  |  |
Total | [1] | 195,405 |  |  |  |
Accumulated Depreciation | [2] | (54,029) |  |  |  |
Net Cost Basis |  | 141,376 |  |  |  |
20400 Century Boulevard |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 3,641 |  |  |  |
Buildings & Improvements |  | 4,759 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 26,600 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 3,641 |  |  |  |
Buildings & Improvements |  | 31,359 |  |  |  |
Total | [1] | 35,000 |  |  |  |
Accumulated Depreciation | [2] | (6,400) |  |  |  |
Net Cost Basis |  | 28,600 |  |  |  |
401 Professional Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,129 |  |  |  |
Buildings & Improvements |  | 6,941 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 12,234 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,129 |  |  |  |
Buildings & Improvements |  | 19,175 |  |  |  |
Total | [1] | 20,304 |  |  |  |
Accumulated Depreciation | [2] | (10,506) |  |  |  |
Net Cost Basis |  | 9,798 |  |  |  |
950 Wind River Lane |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 2,400 |  |  |  |
Buildings & Improvements |  | 10,620 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 1,602 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 2,400 |  |  |  |
Buildings & Improvements |  | 12,222 |  |  |  |
Total | [1] | 14,622 |  |  |  |
Accumulated Depreciation | [2] | (4,746) |  |  |  |
Net Cost Basis |  | 9,876 |  |  |  |
620 Professional Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 784 |  |  |  |
Buildings & Improvements |  | 4,705 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 8,271 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 784 |  |  |  |
Buildings & Improvements |  | 12,976 |  |  |  |
Total | [1] | 13,760 |  |  |  |
Accumulated Depreciation | [2] | (8,847) |  |  |  |
Net Cost Basis |  | 4,913 |  |  |  |
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 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 12,054 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 25,733 |  |  |  |
Total | [1] | 25,733 |  |  |  |
Accumulated Depreciation | [2] | (14,302) |  |  |  |
Net Cost Basis |  | 11,431 |  |  |  |
Alexandria Center for Life Science - Durham |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 190,236 |  |  |  |
Buildings & Improvements |  | 471,263 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 290,512 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 190,236 |  |  |  |
Buildings & Improvements |  | 761,775 |  |  |  |
Total | [1] | 952,011 |  |  |  |
Accumulated Depreciation | [2] | (77,489) |  |  |  |
Net Cost Basis |  | 874,522 |  |  |  |
Alexandria Center for Advanced Technologies - Research Triangle |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 30,584 |  |  |  |
Buildings & Improvements |  | 23,714 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 480,461 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 30,584 |  |  |  |
Buildings & Improvements |  | 504,175 |  |  |  |
Total | [1] | 534,759 |  |  |  |
Accumulated Depreciation | [2] | (66,898) |  |  |  |
Net Cost Basis |  | 467,861 |  |  |  |
Alexandria Center for Sustainable Technologies |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 54,908 |  |  |  |
Buildings & Improvements |  | 18,849 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 140,271 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 54,908 |  |  |  |
Buildings & Improvements |  | 159,120 |  |  |  |
Total | [1] | 214,028 |  |  |  |
Accumulated Depreciation | [2] | (66,435) |  |  |  |
Net Cost Basis |  | 147,593 |  |  |  |
Alexandria Technology Center - Alston |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,430 |  |  |  |
Buildings & Improvements |  | 17,482 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 35,264 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,430 |  |  |  |
Buildings & Improvements |  | 52,746 |  |  |  |
Total | [1] | 54,176 |  |  |  |
Accumulated Depreciation | [2] | (30,051) |  |  |  |
Net Cost Basis |  | 24,125 |  |  |  |
Alexandria Innovation Center - Research Triangle |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,065 |  |  |  |
Buildings & Improvements |  | 21,218 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 32,335 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,065 |  |  |  |
Buildings & Improvements |  | 53,553 |  |  |  |
Total | [1] | 54,618 |  |  |  |
Accumulated Depreciation | [2] | (26,865) |  |  |  |
Net Cost Basis |  | 27,753 |  |  |  |
2525 East NC Highway 54 |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 713 |  |  |  |
Buildings & Improvements |  | 12,827 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 21,217 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 713 |  |  |  |
Buildings & Improvements |  | 34,044 |  |  |  |
Total | [1] | 34,757 |  |  |  |
Accumulated Depreciation | [2] | (18,986) |  |  |  |
Net Cost Basis |  | 15,771 |  |  |  |
6101 Quadrangle Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 1,229 |  |  |  |
Buildings & Improvements |  | 17,733 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 13,746 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 1,229 |  |  |  |
Buildings & Improvements |  | 31,479 |  |  |  |
Total | [1] | 32,708 |  |  |  |
Accumulated Depreciation | [2] | (6,323) |  |  |  |
Net Cost Basis |  | 26,385 |  |  |  |
601 Keystone Park Drive |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 785 |  |  |  |
Buildings & Improvements |  | 11,546 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 16,517 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 785 |  |  |  |
Buildings & Improvements |  | 28,063 |  |  |  |
Total | [1] | 28,848 |  |  |  |
Accumulated Depreciation | [2] | (10,183) |  |  |  |
Net Cost Basis |  | 18,665 |  |  |  |
Alexandria Center for NextGen Medicines |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 94,184 |  |  |  |
Buildings & Improvements |  | 0 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 15,184 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 94,184 |  |  |  |
Buildings & Improvements |  | 15,184 |  |  |  |
Total | [1] | 109,368 |  |  |  |
Accumulated Depreciation | [2] | 0 |  |  |  |
Net Cost Basis |  | 109,368 |  |  |  |
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 |  | 1,145,948 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 1,145,948 |  |  |  |
Total | [1] | 1,145,948 |  |  |  |
Accumulated Depreciation | [2] | (328,535) |  |  |  |
Net Cost Basis |  | 817,413 |  |  |  |
Alexandria Center for Life Science - Long Island City |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 22,746 |  |  |  |
Buildings & Improvements |  | 53,093 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 165,179 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 22,746 |  |  |  |
Buildings & Improvements |  | 218,272 |  |  |  |
Total | [1] | 241,018 |  |  |  |
Accumulated Depreciation | [2] | (11,817) |  |  |  |
Net Cost Basis |  | 229,201 |  |  |  |
Intersection Campus |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 159,310 |  |  |  |
Buildings & Improvements |  | 440,295 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 45,603 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 159,310 |  |  |  |
Buildings & Improvements |  | 485,898 |  |  |  |
Total | [1] | 645,208 |  |  |  |
Accumulated Depreciation | [2] | (38,942) |  |  |  |
Net Cost Basis |  | 606,266 |  |  |  |
1020 Red River Street and 1001 Trinity Street |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 66,451 |  |  |  |
Buildings & Improvements |  | 61,732 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 2,964 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 66,451 |  |  |  |
Buildings & Improvements |  | 64,696 |  |  |  |
Total | [1] | 131,147 |  |  |  |
Accumulated Depreciation | [2] | (20,008) |  |  |  |
Net Cost Basis |  | 111,139 |  |  |  |
Alexandria Center for Advanced Technologies at The Woodlands |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 2,116 |  |  |  |
Buildings & Improvements |  | 9,784 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 133,579 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 2,116 |  |  |  |
Buildings & Improvements |  | 143,363 |  |  |  |
Total | [1] | 145,479 |  |  |  |
Accumulated Depreciation | [2] | (3,199) |  |  |  |
Net Cost Basis |  | 142,280 |  |  |  |
Other - Texas |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 44,217 |  |  |  |
Buildings & Improvements |  | 0 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 12,580 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 44,217 |  |  |  |
Buildings & Improvements |  | 12,580 |  |  |  |
Total | [1] | 56,797 |  |  |  |
Accumulated Depreciation | [2] | 0 |  |  |  |
Net Cost Basis |  | 56,797 |  |  |  |
Canada |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 0 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 75,225 |  |  |  |
Buildings & Improvements |  | 163,161 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 114,376 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 75,225 |  |  |  |
Buildings & Improvements |  | 277,537 |  |  |  |
Total | [1] | 352,762 |  |  |  |
Accumulated Depreciation | [2] | (31,304) |  |  |  |
Net Cost Basis |  | 321,458 |  |  |  |
Various |  |  |  |  |  |
Consolidated Financial Statement Schedule of Rental Properties and Accumulated Depreciation |  |  |  |  |  |
Encumbrances |  | 587 |  |  |  |
Initial Costs |  |  |  |  |  |
Land |  | 426,017 |  |  |  |
Buildings & Improvements |  | 136,472 |  |  |  |
Costs Capitalized Subsequent to Acquisition |  |  |  |  |  |
Buildings & Improvements |  | 403,747 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 426,017 |  |  |  |
Buildings & Improvements |  | 540,219 |  |  |  |
Total | [1] | 966,236 |  |  |  |
Accumulated Depreciation | [2] | (240,180) |  |  |  |
Net Cost Basis |  | 726,056 |  |  |  |
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 |  | 4,155 |  |  |  |
Total Costs |  |  |  |  |  |
Land |  | 0 |  |  |  |
Buildings & Improvements |  | 4,155 |  |  |  |
Total | [1] | 4,155 |  |  |  |
Accumulated Depreciation | [2] | (4,155) |  |  |  |
Net Cost Basis |  | $ 0 |  |  |  |
[1] | As of December 31, 2024, the total cost of our real estate assets aggregated $37.7 billion, which exceeded the cost of real estate for federal income tax purposes aggregating $37.2 billion by approximately $489.4 million.
[2] | The depreciable life is up to 40 years for buildings and building improvements, up to 20 years for land improvements, and the term of the respective lease for tenant improvements.

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