Copley Plaza Cooperative

How does Copley Plaza Cooperative 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. Copley Plaza Cooperative's ENERGY STAR score of 79 compares with an average of 72 across the 1,618 that report a score; it scores higher than 50% of them and lower than 49%. Its site EUI of 62.4 kBtu/ft² is about 22% above the average of 51.1 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 3.9 kgCO₂e/ft² is roughly in line with the group average of 3.8 kgCO₂e/ft².

At 97,795 sq ft, it is about 28% below the average floor area of 136,346 sq ft for those buildings. It was built in 1917, 48 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 Copley Plaza Cooperative's energy performance changed over time?

BuildingCensus holds 11 Washington, DC disclosures for Copley Plaza Cooperative, covering report years 2014–2024. Its ENERGY STAR score went from 61 in 2014 to 79 in 2024 (+18 points); its best year on file was 2018, at 100. Site EUI moved from 82.4 kBtu/ft² (2014) to 62.4 kBtu/ft² (2024), a 24% decrease. Reported emissions went from 512 tCO₂e to 379 tCO₂e over the same span (down 26%).

What does an ENERGY STAR score of 79 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 79 means the building performs better than about 79% of its national peers. BuildingCensus bands the score into report-card grades; 79 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. Copley Plaza Cooperative's 62.4 kBtu/ft² across 97,795 sq ft works out to about 6.1 billion Btu (1,788 MWh-equivalent) in 2024. Its source EUI of 94.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 466,363 kWh of electricity, 45,103 therms of natural gas and 2,454 thousand gallons of water for the year.

Which law requires Copley Plaza Cooperative to report its energy use?

Copley Plaza Cooperative 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:PM4320214:2024). 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.