Cliffbourne Condominium
Multifamily Housing in Washington, DC, DC · 1855 Calvert St NW · 20009
At a glance
Cliffbourne Condominium is a 34,612-square-foot multifamily housing building at 1855 Calvert St NW in Washington, DC, built in 1915. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 29.5 kBtu/ft² and 75 tCO₂e of greenhouse-gas emissions. That score is higher than 95% 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 | 100 (band A) |
| Site EUI | 29.5 kBtu/ft² |
| Source EUI | 51.5 kBtu/ft² |
| GHG emissions | 75 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 120,089 kWh |
| Natural gas | 4,249 therms |
| Water use | 946 kgal |
| Gross floor area | 34,612 sq ft |
| Source record | dc:PM20474415:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 29.5 kBtu/ft² | 75 tCO₂e |
| 2023 | 100 | ±0 | 25.7 kBtu/ft² | 64 tCO₂e |
| 2022 | 100 | 29.8 kBtu/ft² | 77 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
THE CLIFFBOURNE HOUSE
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Location
- Address
- 1855 Calvert St NW
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20009
- Coordinates
- 38.92351, -77.04494
Within ~1 km
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How does Cliffbourne Condominium 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. Cliffbourne Condominium's ENERGY STAR score of 100 compares with an average of 72 across the 1,618 that report a score; it scores higher than 95% of them. Its site EUI of 29.5 kBtu/ft² is about 42% 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 2.2 kgCO₂e/ft² is about 43% below the group average of 3.8 kgCO₂e/ft².
At 34,612 sq ft, it is about 75% below the average floor area of 136,346 sq ft for those buildings. It was built in 1915, 50 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 Cliffbourne Condominium's energy performance changed over time?
BuildingCensus holds 3 Washington, DC disclosures for Cliffbourne Condominium, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2024. Site EUI moved from 29.8 kBtu/ft² (2022) to 29.5 kBtu/ft² (2024), a 1% decrease. Reported emissions went from 77 tCO₂e to 75 tCO₂e over the same span (down 2%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. Cliffbourne Condominium's 29.5 kBtu/ft² across 34,612 sq ft works out to about 1 billion Btu (299 MWh-equivalent) in 2024. Its source EUI of 51.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 120,089 kWh of electricity, 4,249 therms of natural gas and 946 thousand gallons of water for the year.
Which law requires Cliffbourne Condominium to report its energy use?
Cliffbourne Condominium 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:PM20474415:2024). 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
- The Lima Condominiums· 34,473 sq ft · score 100 (A)
- Park Vista 3404 13th St· 34,257 sq ft · score 78 (B)
- 2801 15th St· 34,230 sq ft · score 72 (B)
- 743 Fairmont Street NW· 34,145 sq ft · score 85 (A)
- Milestone 2501 N Street S.E.· 34,104 sq ft · score 90 (A)
- CHINATOWN EAST CONDOMINIUMS· 34,097 sq ft · score 95 (A)
- 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
- Least efficient large buildings in Washington, DC
- Biggest emitters in Washington, DC
Frequently asked questions
What is Cliffbourne Condominium's energy grade?
Cliffbourne Condominium scores 100 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 Cliffbourne Condominium use?
Its 2024 site energy-use intensity was 29.5 kBtu/ft² (51.5 kBtu/ft² source) across 34,612 sq ft, including 120,089 kWh of electricity and 4,249 therms of natural gas.
What are Cliffbourne Condominium's carbon emissions?
Cliffbourne Condominium reported 75 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2024.
Where is Cliffbourne Condominium?
Cliffbourne Condominium is at 1855 Calvert St NW, in Washington, DC 20009. Its coordinates are 38.92351, -77.04494 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is Cliffbourne Condominium and when was it built?
Cliffbourne Condominium has 34,612 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1915 as its year built. It is classed as multifamily housing.
Is Cliffbourne Condominium 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, “Cliffbourne Condominium, Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/cliffbourne-condominium-63cacaba (data as of July 9, 2026).