400 Massachusetts Ave Condominium

How does 400 Massachusetts Ave 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. 400 Massachusetts Ave Condominium's ENERGY STAR score of 65 compares with an average of 72 across the 1,618 that report a score; it scores higher than 32% of them and lower than 67%. Its site EUI of 45.7 kBtu/ft² is about 11% 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 3.5 kgCO₂e/ft² is roughly in line with the group average of 3.8 kgCO₂e/ft².

At 341,300 sq ft, it is about 150% above the average floor area of 136,346 sq ft for those buildings. It was built in 2004, 39 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 400 Massachusetts Ave Condominium's energy performance changed over time?

BuildingCensus holds 13 Washington, DC disclosures for 400 Massachusetts Ave Condominium, covering report years 2012–2024. Its ENERGY STAR score went from 86 in 2014 to 65 in 2024 (-21 points); its best year on file was 2016, at 89. Site EUI moved from 65.2 kBtu/ft² (2014) to 45.7 kBtu/ft² (2024), a 30% decrease. Reported emissions went from 1,015 tCO₂e to 1,183 tCO₂e over the same span (up 17%).

What does an ENERGY STAR score of 65 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 65 means the building performs better than about 65% of its national peers. BuildingCensus bands the score into report-card grades; 65 falls in band C — below median (55–69). It sits 10 points below 75, the threshold for ENERGY STAR certification. 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. 400 Massachusetts Ave Condominium's 45.7 kBtu/ft² across 341,300 sq ft works out to about 15.6 billion Btu (4,571 MWh-equivalent) in 2024. Its source EUI of 100.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,998,608 kWh of electricity, 53,758 therms of natural gas and 11,902 thousand gallons of water for the year.

Which law requires 400 Massachusetts Ave Condominium to report its energy use?

400 Massachusetts Ave 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:PM3512771:2024). 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.