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SCHEDULE III (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 USD ($) property | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Initial Cost |  |  |  |
Land | $ 412,214,000 |  |  |
Buildings and Improvements | 1,404,592,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 597,507,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 383,808,000 |  |  |
Buildings and Improvements | 2,030,505,000 |  |  |
Total | 2,414,313,000 | $ 2,375,097,000 | $ 2,299,712,000 | $ 1,990,810,000
Accumulated Depreciation | 618,299,000 | 528,024,000 | 479,846,000 | $ 401,926,000
Real estate impairment | 0 | 41,860,000 | $ 0 |
Carrying value for federal income tax purposes | 1,500,000,000 |  |  |
Properties under development or held for future development | $ 30,980,000 | 30,980,000 |  |
Building | Minimum |  |  |  |
Gross Amounts at Which Carried |  |  |  |
Useful life (in years) | 3 years |  |  |
Building | Maximum |  |  |  |
Gross Amounts at Which Carried |  |  |  |
Useful life (in years) | 40 years |  |  |
Various development projects |  |  |  |
Gross Amounts at Which Carried |  |  |  |
Properties under development or held for future development | $ 600,000 |  |  |
Residential |  |  |  |
Initial Cost |  |  |  |
Land | 366,233,000 |  |  |
Buildings and Improvements | 1,326,267,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 627,524,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 352,322,000 |  |  |
Buildings and Improvements | 1,967,702,000 |  |  |
Total | 2,320,024,000 |  |  |
Accumulated Depreciation | $ 612,375,000 |  |  |
Number of residential properties under development | property | 1 |  |  |
Properties under development or held for future development | $ 31,000,000.0 | $ 31,000,000.0 |  |
Residential | 3801 Connecticut Avenue |  |  |  |
Initial Cost |  |  |  |
Land | 420,000 |  |  |
Buildings and Improvements | 2,678,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 23,809,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 420,000 |  |  |
Buildings and Improvements | 26,487,000 |  |  |
Total | 26,907,000 |  |  |
Accumulated Depreciation | $ 19,246,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Roosevelt Towers |  |  |  |
Initial Cost |  |  |  |
Land | $ 336,000 |  |  |
Buildings and Improvements | 1,996,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 15,779,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 336,000 |  |  |
Buildings and Improvements | 17,775,000 |  |  |
Total | 18,111,000 |  |  |
Accumulated Depreciation | $ 14,539,000 |  |  |
Depreciation Life | 40 years |  |  |
Residential | Park Adams |  |  |  |
Initial Cost |  |  |  |
Land | $ 287,000 |  |  |
Buildings and Improvements | 1,654,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 18,458,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 287,000 |  |  |
Buildings and Improvements | 20,112,000 |  |  |
Total | 20,399,000 |  |  |
Accumulated Depreciation | $ 14,327,000 |  |  |
Depreciation Life | 35 years |  |  |
Residential | The Ashby at McLean |  |  |  |
Initial Cost |  |  |  |
Land | $ 4,356,000 |  |  |
Buildings and Improvements | 17,102,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 36,436,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 4,356,000 |  |  |
Buildings and Improvements | 53,538,000 |  |  |
Total | 57,894,000 |  |  |
Accumulated Depreciation | $ 39,538,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Bethesda Hill Apartments |  |  |  |
Initial Cost |  |  |  |
Land | $ 3,900,000 |  |  |
Buildings and Improvements | 13,412,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 18,668,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 3,900,000 |  |  |
Buildings and Improvements | 32,080,000 |  |  |
Total | 35,980,000 |  |  |
Accumulated Depreciation | $ 26,066,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Bennett Park |  |  |  |
Initial Cost |  |  |  |
Land | $ 2,861,000 |  |  |
Buildings and Improvements | 917,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 83,946,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 4,774,000 |  |  |
Buildings and Improvements | 82,950,000 |  |  |
Total | 87,724,000 |  |  |
Accumulated Depreciation | $ 55,126,000 |  |  |
Depreciation Life | 28 years |  |  |
Residential | The Clayborne |  |  |  |
Initial Cost |  |  |  |
Land | $ 269,000 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 32,363,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 699,000 |  |  |
Buildings and Improvements | 31,933,000 |  |  |
Total | 32,632,000 |  |  |
Accumulated Depreciation | $ 21,766,000 |  |  |
Depreciation Life | 26 years |  |  |
Residential | Kenmore Apartments |  |  |  |
Initial Cost |  |  |  |
Land | $ 28,222,000 |  |  |
Buildings and Improvements | 33,955,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 23,147,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 28,222,000 |  |  |
Buildings and Improvements | 57,102,000 |  |  |
Total | 85,324,000 |  |  |
Accumulated Depreciation | $ 29,074,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | The Maxwell |  |  |  |
Initial Cost |  |  |  |
Land | $ 12,787,000 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 39,354,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 12,850,000 |  |  |
Buildings and Improvements | 39,291,000 |  |  |
Total | 52,141,000 |  |  |
Accumulated Depreciation | $ 18,715,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Yale West |  |  |  |
Initial Cost |  |  |  |
Land | $ 14,684,000 |  |  |
Buildings and Improvements | 62,069,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 2,705,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 14,684,000 |  |  |
Buildings and Improvements | 64,774,000 |  |  |
Total | 79,458,000 |  |  |
Accumulated Depreciation | $ 24,738,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | The Paramount |  |  |  |
Initial Cost |  |  |  |
Land | $ 8,568,000 |  |  |
Buildings and Improvements | 38,716,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 4,722,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 8,568,000 |  |  |
Buildings and Improvements | 43,438,000 |  |  |
Total | 52,006,000 |  |  |
Accumulated Depreciation | $ 19,137,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | The Wellington |  |  |  |
Initial Cost |  |  |  |
Land | $ 30,548,000 |  |  |
Buildings and Improvements | 116,563,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 28,346,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 30,259,000 |  |  |
Buildings and Improvements | 145,198,000 |  |  |
Total | 175,457,000 |  |  |
Accumulated Depreciation | $ 50,239,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Trove |  |  |  |
Initial Cost |  |  |  |
Land | $ 15,000,000 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 119,069,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 15,000,000 |  |  |
Buildings and Improvements | 119,069,000 |  |  |
Total | 134,069,000 |  |  |
Accumulated Depreciation | $ 30,163,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Riverside Apartments |  |  |  |
Initial Cost |  |  |  |
Land | $ 38,924,000 |  |  |
Buildings and Improvements | 184,854,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 58,959,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 38,864,000 |  |  |
Buildings and Improvements | 243,873,000 |  |  |
Total | 282,737,000 |  |  |
Accumulated Depreciation | $ 82,380,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Riverside Apartments land parcel |  |  |  |
Initial Cost |  |  |  |
Land | $ 15,968,000 |  |  |
Buildings and Improvements | 0 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 14,419,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 0 |  |  |
Buildings and Improvements | 30,387,000 |  |  |
Total | 30,387,000 |  |  |
Accumulated Depreciation | 0 |  |  |
Residential | Riverside Apartments land parcel | Virginia |  |  |  |
Gross Amounts at Which Carried |  |  |  |
Properties under development or held for future development | 30,400,000 |  |  |
Residential | Elme Alexandria |  |  |  |
Initial Cost |  |  |  |
Land | 23,942,000 |  |  |
Buildings and Improvements | 93,672,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 23,148,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 23,942,000 |  |  |
Buildings and Improvements | 116,820,000 |  |  |
Total | 140,762,000 |  |  |
Accumulated Depreciation | $ 25,204,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Manassas |  |  |  |
Initial Cost |  |  |  |
Land | $ 13,586,000 |  |  |
Buildings and Improvements | 68,802,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 10,600,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 13,586,000 |  |  |
Buildings and Improvements | 79,402,000 |  |  |
Total | 92,988,000 |  |  |
Accumulated Depreciation | $ 17,884,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Dulles |  |  |  |
Initial Cost |  |  |  |
Land | $ 12,476,000 |  |  |
Buildings and Improvements | 66,852,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 11,927,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 12,476,000 |  |  |
Buildings and Improvements | 78,779,000 |  |  |
Total | 91,255,000 |  |  |
Accumulated Depreciation | $ 17,734,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Leesburg |  |  |  |
Initial Cost |  |  |  |
Land | $ 4,113,000 |  |  |
Buildings and Improvements | 21,286,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 2,532,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 4,113,000 |  |  |
Buildings and Improvements | 23,818,000 |  |  |
Total | 27,931,000 |  |  |
Accumulated Depreciation | $ 6,003,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Herndon |  |  |  |
Initial Cost |  |  |  |
Land | $ 11,225,000 |  |  |
Buildings and Improvements | 51,534,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 9,729,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 11,225,000 |  |  |
Buildings and Improvements | 61,263,000 |  |  |
Total | 72,488,000 |  |  |
Accumulated Depreciation | $ 14,077,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Germantown |  |  |  |
Initial Cost |  |  |  |
Land | $ 7,609,000 |  |  |
Buildings and Improvements | 34,431,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 5,149,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 7,609,000 |  |  |
Buildings and Improvements | 39,580,000 |  |  |
Total | 47,189,000 |  |  |
Accumulated Depreciation | $ 9,334,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Watkins Mill |  |  |  |
Initial Cost |  |  |  |
Land | $ 7,151,000 |  |  |
Buildings and Improvements | 30,851,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 3,066,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 7,151,000 |  |  |
Buildings and Improvements | 33,917,000 |  |  |
Total | 41,068,000 |  |  |
Accumulated Depreciation | $ 8,446,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Cascade at Landmark |  |  |  |
Initial Cost |  |  |  |
Land | $ 12,289,000 |  |  |
Buildings and Improvements | 56,235,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 6,355,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 12,289,000 |  |  |
Buildings and Improvements | 62,590,000 |  |  |
Total | 74,879,000 |  |  |
Accumulated Depreciation | $ 13,472,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Conyers |  |  |  |
Initial Cost |  |  |  |
Land | $ 4,798,000 |  |  |
Buildings and Improvements | 42,122,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 4,861,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 4,798,000 |  |  |
Buildings and Improvements | 46,983,000 |  |  |
Total | 51,781,000 |  |  |
Accumulated Depreciation | $ 7,181,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Eagles Landing |  |  |  |
Initial Cost |  |  |  |
Land | $ 16,117,000 |  |  |
Buildings and Improvements | 86,460,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 8,227,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 16,117,000 |  |  |
Buildings and Improvements | 94,687,000 |  |  |
Total | 110,804,000 |  |  |
Accumulated Depreciation | $ 13,486,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Sandy Springs |  |  |  |
Initial Cost |  |  |  |
Land | $ 17,423,000 |  |  |
Buildings and Improvements | 85,817,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 8,900,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 17,423,000 |  |  |
Buildings and Improvements | 94,717,000 |  |  |
Total | 112,140,000 |  |  |
Accumulated Depreciation | $ 11,966,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Marietta |  |  |  |
Initial Cost |  |  |  |
Land | $ 19,019,000 |  |  |
Buildings and Improvements | 83,319,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 3,314,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 19,019,000 |  |  |
Buildings and Improvements | 86,633,000 |  |  |
Total | 105,652,000 |  |  |
Accumulated Depreciation | $ 9,965,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Cumberland |  |  |  |
Initial Cost |  |  |  |
Land | $ 14,106,000 |  |  |
Buildings and Improvements | 51,689,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 5,624,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 14,106,000 |  |  |
Buildings and Improvements | 57,313,000 |  |  |
Total | 71,419,000 |  |  |
Accumulated Depreciation | $ 6,997,000 |  |  |
Depreciation Life | 30 years |  |  |
Residential | Elme Druid Hills |  |  |  |
Initial Cost |  |  |  |
Land | $ 25,249,000 |  |  |
Buildings and Improvements | 79,281,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | 3,912,000 |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 25,249,000 |  |  |
Buildings and Improvements | 83,193,000 |  |  |
Total | 108,442,000 |  |  |
Accumulated Depreciation | $ 5,572,000 |  |  |
Depreciation Life | 30 years |  |  |
Office Building | Watergate 600 |  |  |  |
Initial Cost |  |  |  |
Land | $ 45,981,000 |  |  |
Buildings and Improvements | 78,325,000 |  |  |
Net Improvements (Retirement) since Acquisition |  |  |  |
Net Improvements (Retirement) since Acquisition | (30,017,000) |  |  |
Gross Amounts at Which Carried |  |  |  |
Land | 31,486,000 |  |  |
Buildings and Improvements | 62,803,000 |  |  |
Total | 94,289,000 |  |  |
Accumulated Depreciation | $ 5,924,000 |  |  |
Depreciation Life | 30 years |  |  |

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