Dumbarton Court Coop
Multifamily Housing in Washington, DC, DC · 1657 31st St · 20007
At a glance
Dumbarton Court Coop is a 42,110-square-foot multifamily housing building at 1657 31st St in Washington, DC, built in 1910. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 97 out of 100 (grade A), a site energy-use intensity of 43.9 kBtu/ft² and 111 tCO₂e of greenhouse-gas emissions. That score is higher than 87% of the 1,618 scored multifamily housing buildings in Washington, DC.
Clean and Affordable Energy Act / BEPS · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 97 (band A) |
| Site EUI | 43.9 kBtu/ft² |
| Source EUI | 61.3 kBtu/ft² |
| GHG emissions | 111 tCO₂e |
| GHG intensity | 2.6 kgCO₂e/ft² |
| Electricity | 107,430 kWh |
| Natural gas | 14,824 therms |
| Water use | 673 kgal |
| Gross floor area | 42,110 sq ft |
| Source record | dc:PM19579507:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 97 | -1 | 43.9 kBtu/ft² | 111 tCO₂e |
| 2023 | 98 | -1 | 39.9 kBtu/ft² | 101 tCO₂e |
| 2022 | 99 | 40.4 kBtu/ft² | 103 tCO₂e |
Compliance context
Clean and Affordable Energy Act / BEPS
DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.
Ownership
DUMBARTON COURT OWNERS INC
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Location
- Address
- 1657 31st St
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20007
- Coordinates
- 38.91210, -77.06220
Within ~1 km
Nearby benchmarked buildings
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- The Glover House A, B, Cscore 100
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See also: most efficient in Washington, DC · biggest emitters
How does Dumbarton Court Coop compare with other multifamily housing buildings in Washington, DC?
The latest disclosures cover 1,799 multifamily housing buildings in Washington, DC, out of 6,870 buildings citywide. Dumbarton Court Coop's ENERGY STAR score of 97 compares with an average of 72 across the 1,618 that report a score; it scores higher than 87% of them and lower than 10%. Its site EUI of 43.9 kBtu/ft² is about 14% below the average of 51.1 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.6 kgCO₂e/ft² is about 31% below the group average of 3.8 kgCO₂e/ft².
At 42,110 sq ft, it is about 69% below the average floor area of 136,346 sq ft for those buildings. It was built in 1910, 55 years earlier than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².
How has Dumbarton Court Coop's energy performance changed over time?
BuildingCensus holds 3 Washington, DC disclosures for Dumbarton Court Coop, covering report years 2022–2024. Its ENERGY STAR score went from 99 in 2022 to 97 in 2024 (-2 points); its best year on file was 2022, at 99. Site EUI moved from 40.4 kBtu/ft² (2022) to 43.9 kBtu/ft² (2024), an 9% increase. Reported emissions went from 103 tCO₂e to 111 tCO₂e over the same span (up 8%).
What does an ENERGY STAR score of 97 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 97 means the building performs better than about 97% of its national peers. BuildingCensus bands the score into report-card grades; 97 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In Washington, DC, 47% of scored buildings are at 75 or above.
Site energy-use intensity (EUI) is the energy a building uses on site in a year divided by its floor area, in thousand Btu per square foot — lower is more efficient. Dumbarton Court Coop's 43.9 kBtu/ft² across 42,110 sq ft works out to about 1.8 billion Btu (542 MWh-equivalent) in 2024. Its source EUI of 61.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 107,430 kWh of electricity, 14,824 therms of natural gas and 673 thousand gallons of water for the year.
Which law requires Dumbarton Court Coop to report its energy use?
Dumbarton Court Coop reports under the Clean and Affordable Energy Act / BEPS, the legal basis of Washington, DC's Building Energy Benchmarking program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record dc:PM19579507:2024). DC's Building Energy Performance Standards (BEPS) require buildings below the performance standard to improve over compliance cycles (the first ends December 31, 2026; later cycles run five years), with penalties for buildings that fail to meet their pathway.
More multifamily housing buildings in Washington, DC
- 734 Longfellow· 42,071 sq ft · score 98 (A)
- Logan Court Condominium· 42,044 sq ft · score 95 (A)
- 5112 Connecticut Avenue Cooperative· 41,992 sq ft · score 92 (A)
- Hillside Condo· 41,978 sq ft · score 98 (A)
- CH Houston· 41,850 sq ft · score 63 (C)
- 5600 Chillum Pl NE· 41,724 sq ft · score 54 (D)
- Multifamily Housing buildings in Washington, DC· 1,799 benchmarked
- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
- Most efficient large buildings in Washington, DC
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- Biggest emitters in Washington, DC
Frequently asked questions
What is Dumbarton Court Coop's energy grade?
Dumbarton Court Coop scores 97 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Dumbarton Court Coop use?
Its 2024 site energy-use intensity was 43.9 kBtu/ft² (61.3 kBtu/ft² source) across 42,110 sq ft, including 107,430 kWh of electricity and 14,824 therms of natural gas.
What are Dumbarton Court Coop's carbon emissions?
Dumbarton Court Coop reported 111 tCO₂e of greenhouse-gas emissions (2.6 kgCO₂e/ft²) for 2024.
Where is Dumbarton Court Coop?
Dumbarton Court Coop is at 1657 31st St, in Washington, DC 20007. Its coordinates are 38.91210, -77.06220 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Dumbarton Court Coop and when was it built?
Dumbarton Court Coop has 42,110 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1910 as its year built. It is classed as multifamily housing.
Is Dumbarton Court Coop covered by the Clean and Affordable Energy Act / BEPS?
Yes — it appears in the 2024 Building Energy Benchmarking disclosure, which lists the buildings reporting under the Clean and Affordable Energy Act / BEPS.
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About this data
Source: Building Energy Benchmarking (Clean and Affordable Energy Act / BEPS), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “Dumbarton Court Coop, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/dumbarton-court-coop-84b4924d (data as of July 9, 2026).