1150 K Street Condominiums
Multifamily Housing in Washington, DC, DC · 1150 K St NW · 20005
At a glance
1150 K Street Condominiums is a 111,618-square-foot multifamily housing building at 1150 K St NW in Washington, DC, built in 2005. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 36.4 kBtu/ft² and 335 tCO₂e of greenhouse-gas emissions. That score is higher than 72% 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 | 91 (band A) |
| Site EUI | 36.4 kBtu/ft² |
| Source EUI | 92.3 kBtu/ft² |
| GHG emissions | 335 tCO₂e |
| GHG intensity | 3.0 kgCO₂e/ft² |
| Electricity | 1,010,674 kWh |
| Natural gas | 6,155 therms |
| Water use | 4,427 kgal |
| Gross floor area | 111,618 sq ft |
| Source record | dc:PM15935900:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | +2 | 36.4 kBtu/ft² | 335 tCO₂e |
| 2023 | 89 | +3 | 37.0 kBtu/ft² | 344 tCO₂e |
| 2022 | 86 | +7 | 41.2 kBtu/ft² | 368 tCO₂e |
| 2021 | 79 | 43.2 kBtu/ft² | 413 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
1150 K STREET CONDOMINIUM
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Location
- Address
- 1150 K St NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20005
- Coordinates
- 38.90220, -77.02783
Within ~1 km
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See also: most efficient in Washington, DC · biggest emitters
How does 1150 K Street Condominiums 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. 1150 K Street Condominiums's ENERGY STAR score of 91 compares with an average of 72 across the 1,618 that report a score; it scores higher than 72% of them and lower than 26%. Its site EUI of 36.4 kBtu/ft² is about 29% 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 3.0 kgCO₂e/ft² is about 21% below the group average of 3.8 kgCO₂e/ft².
At 111,618 sq ft, it is about 18% below the average floor area of 136,346 sq ft for those buildings. It was built in 2005, 40 years later 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 1150 K Street Condominiums's energy performance changed over time?
BuildingCensus holds 4 Washington, DC disclosures for 1150 K Street Condominiums, covering report years 2021–2024. Its ENERGY STAR score went from 79 in 2021 to 91 in 2024 (+12 points). Site EUI moved from 43.2 kBtu/ft² (2021) to 36.4 kBtu/ft² (2024), a 16% decrease. Reported emissions went from 413 tCO₂e to 335 tCO₂e over the same span (down 19%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. 1150 K Street Condominiums's 36.4 kBtu/ft² across 111,618 sq ft works out to about 4.1 billion Btu (1,191 MWh-equivalent) in 2024. Its source EUI of 92.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,010,674 kWh of electricity, 6,155 therms of natural gas and 4,427 thousand gallons of water for the year.
Which law requires 1150 K Street Condominiums to report its energy use?
1150 K Street Condominiums 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:PM15935900:2024). 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
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- Multifamily Housing buildings in Washington, DC· 1,799 benchmarked
- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
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Frequently asked questions
What is 1150 K Street Condominiums's energy grade?
1150 K Street Condominiums scores 91 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 1150 K Street Condominiums use?
Its 2024 site energy-use intensity was 36.4 kBtu/ft² (92.3 kBtu/ft² source) across 111,618 sq ft, including 1,010,674 kWh of electricity and 6,155 therms of natural gas.
What are 1150 K Street Condominiums's carbon emissions?
1150 K Street Condominiums reported 335 tCO₂e of greenhouse-gas emissions (3.0 kgCO₂e/ft²) for 2024.
Where is 1150 K Street Condominiums?
1150 K Street Condominiums is at 1150 K St NW, in Washington, DC 20005. Its coordinates are 38.90220, -77.02783 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 1150 K Street Condominiums and when was it built?
1150 K Street Condominiums has 111,618 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2005 as its year built. It is classed as multifamily housing.
Is 1150 K Street Condominiums 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, “1150 K Street Condominiums, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/1150-k-street-condominiums-12259022 (data as of July 9, 2026).