BuildingCensus
B

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.

ENERGY STAR score
80
band B · 2024
Site EUI
33.7
kBtu/ft²
GHG emissions
820
tCO₂e
GHG intensity
3.0
kgCO₂e/ft²
Floor area
277,005
sq ft
Year built
2008
vintage
◆ Loading map…
85–10070–8455–691–54
This entry + 6 nearby

Clean and Affordable Energy Act / BEPS · reporting year 2024

Benchmarking record

FieldValue
ENERGY STAR score80 (band B)
Site EUI33.7 kBtu/ft²
Source EUI94.4 kBtu/ft²
GHG emissions820 tCO₂e
GHG intensity3.0 kgCO₂e/ft²
Electricity2,737,919 kWh
Natural gas0 therms
Water use6,658 kgal
Gross floor area277,005 sq ft
Source recorddc:PM3883860:2024

The disclosure history

Year over year

YearScoreΔSite EUIGHG emissions
2024latest80-233.7 kBtu/ft²820 tCO₂e
202382-931.6 kBtu/ft²788 tCO₂e
202291+630.1 kBtu/ft²725 tCO₂e
202185+431.1 kBtu/ft²800 tCO₂e
202081+331.8 kBtu/ft²817 tCO₂e
201978+234.4 kBtu/ft²913 tCO₂e
201876+1235.5 kBtu/ft²943 tCO₂e
201764-335.3 kBtu/ft²1,084 tCO₂e
201667+236.2 kBtu/ft²1,151 tCO₂e
201565-1936.7 kBtu/ft²1,361 tCO₂e
20148434.5 kBtu/ft²1,278 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.

Program details →

Ownership

100 EYE STREET ACQUISITION LLC

Own or manage this building? Claim it to correct the record and get compliance alerts.

Location

Address
100 I St
State
District of Columbia
ZIP
20003
Coordinates
38.87960, -77.00641

Within ~1 km

Nearby benchmarked buildings

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

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.

Working with Washington, DC building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.

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).