100 Capitol Yards -CO (cp041)
Multifamily Housing in Washington, DC, DC · 100 I St · 20003
At a glance
100 Capitol Yards -CO (cp041) is a 277,005-square-foot multifamily housing building at 100 I St in Washington, DC, built in 2008. In its 2024 Washington, DC benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 33.7 kBtu/ft² and 820 tCO₂e of greenhouse-gas emissions. That score is higher than 51% 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 | 80 (band B) |
| Site EUI | 33.7 kBtu/ft² |
| Source EUI | 94.4 kBtu/ft² |
| GHG emissions | 820 tCO₂e |
| GHG intensity | 3.0 kgCO₂e/ft² |
| Electricity | 2,737,919 kWh |
| Natural gas | 0 therms |
| Water use | 6,658 kgal |
| Gross floor area | 277,005 sq ft |
| Source record | dc:PM3883860:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 80 | -2 | 33.7 kBtu/ft² | 820 tCO₂e |
| 2023 | 82 | -9 | 31.6 kBtu/ft² | 788 tCO₂e |
| 2022 | 91 | +6 | 30.1 kBtu/ft² | 725 tCO₂e |
| 2021 | 85 | +4 | 31.1 kBtu/ft² | 800 tCO₂e |
| 2020 | 81 | +3 | 31.8 kBtu/ft² | 817 tCO₂e |
| 2019 | 78 | +2 | 34.4 kBtu/ft² | 913 tCO₂e |
| 2018 | 76 | +12 | 35.5 kBtu/ft² | 943 tCO₂e |
| 2017 | 64 | -3 | 35.3 kBtu/ft² | 1,084 tCO₂e |
| 2016 | 67 | +2 | 36.2 kBtu/ft² | 1,151 tCO₂e |
| 2015 | 65 | -19 | 36.7 kBtu/ft² | 1,361 tCO₂e |
| 2014 | 84 | 34.5 kBtu/ft² | 1,278 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
100 EYE STREET ACQUISITION LLC
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Location
- Address
- 100 I St
- City
- Washington, DC
- State
- District of Columbia
- ZIP
- 20003
- Coordinates
- 38.87960, -77.00641
Within ~1 km
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See also: most efficient in Washington, DC · biggest emitters
How does 100 Capitol Yards -CO (cp041) 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. 100 Capitol Yards -CO (cp041)'s ENERGY STAR score of 80 compares with an average of 72 across the 1,618 that report a score; it scores higher than 51% of them and lower than 47%. Its site EUI of 33.7 kBtu/ft² is about 34% 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 22% below the group average of 3.8 kgCO₂e/ft².
At 277,005 sq ft, it is about twice the average floor area of 136,346 sq ft for those buildings. It was built in 2008, 43 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 100 Capitol Yards -CO (cp041)'s energy performance changed over time?
BuildingCensus holds 11 Washington, DC disclosures for 100 Capitol Yards -CO (cp041), covering report years 2014–2024. Its ENERGY STAR score went from 84 in 2014 to 80 in 2024 (-4 points); its best year on file was 2022, at 91. Site EUI moved from 34.5 kBtu/ft² (2014) to 33.7 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 1,278 tCO₂e to 820 tCO₂e over the same span (down 36%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 falls in band B — above median (70–84). 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. 100 Capitol Yards -CO (cp041)'s 33.7 kBtu/ft² across 277,005 sq ft works out to about 9.3 billion Btu (2,736 MWh-equivalent) in 2024. Its source EUI of 94.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,737,919 kWh of electricity, 0 therms of natural gas and 6,658 thousand gallons of water for the year.
Which law requires 100 Capitol Yards -CO (cp041) to report its energy use?
100 Capitol Yards -CO (cp041) 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:PM3883860:2024). 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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- All Washington, DC benchmarked buildings· Clean and Affordable Energy Act / BEPS
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Frequently asked questions
What is 100 Capitol Yards -CO (cp041)'s energy grade?
100 Capitol Yards -CO (cp041) scores 80 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 Washington, DC disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 100 Capitol Yards -CO (cp041) use?
Its 2024 site energy-use intensity was 33.7 kBtu/ft² (94.4 kBtu/ft² source) across 277,005 sq ft, including 2,737,919 kWh of electricity and 0 therms of natural gas.
What are 100 Capitol Yards -CO (cp041)'s carbon emissions?
100 Capitol Yards -CO (cp041) reported 820 tCO₂e of greenhouse-gas emissions (3.0 kgCO₂e/ft²) for 2024.
Where is 100 Capitol Yards -CO (cp041)?
100 Capitol Yards -CO (cp041) is at 100 I St, in Washington, DC 20003. Its coordinates are 38.87960, -77.00641 (latitude, longitude), as published in the Building Energy Benchmarking file.
How big is 100 Capitol Yards -CO (cp041) and when was it built?
100 Capitol Yards -CO (cp041) has 277,005 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2008 as its year built. It is classed as multifamily housing.
Is 100 Capitol Yards -CO (cp041) 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, “100 Capitol Yards -CO (cp041), Washington, DC — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/washington-dc/100-capitol-yards-co-cp041-1999bf18 (data as of July 9, 2026).