4600 Connecticut Avenue Condominium

How does 4600 Connecticut Avenue 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. 4600 Connecticut Avenue Condominium's ENERGY STAR score of 90 compares with an average of 72 across the 1,618 that report a score; it scores higher than 70% of them and lower than 28%. Its site EUI of 55.9 kBtu/ft² is roughly in line with the average of 51.1 kBtu/ft². Its emissions intensity of 3.6 kgCO₂e/ft² is roughly in line with the group average of 3.8 kgCO₂e/ft².

At 287,964 sq ft, it is about twice the average floor area of 136,346 sq ft for those buildings. It was built in 1948, 17 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 4600 Connecticut Avenue Condominium's energy performance changed over time?

BuildingCensus holds 12 Washington, DC disclosures for 4600 Connecticut Avenue Condominium, covering report years 2012–2023. Its ENERGY STAR score went from 100 in 2014 to 90 in 2023 (-10 points); its best year on file was 2014, at 100. Site EUI moved from 21.7 kBtu/ft² (2012) to 55.9 kBtu/ft² (2023), an 158% increase. Reported emissions went from 919 tCO₂e to 1,044 tCO₂e over the same span (up 14%).

What does an ENERGY STAR score of 90 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 90 means the building performs better than about 90% of its national peers. BuildingCensus bands the score into report-card grades; 90 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. 4600 Connecticut Avenue Condominium's 55.9 kBtu/ft² across 287,964 sq ft works out to about 16.1 billion Btu (4,718 MWh-equivalent) in 2023. Its source EUI of 88.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,431,729 kWh of electricity, 109,245 therms of natural gas and 10,273 thousand gallons of water for the year.

Which law requires 4600 Connecticut Avenue Condominium to report its energy use?

4600 Connecticut Avenue 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 2023 disclosure (source record dc:PM3259832:2023). 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.