1400 Aspen Street NW

How does 1400 Aspen Street NW 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. 1400 Aspen Street NW's ENERGY STAR score of 100 compares with an average of 72 across the 1,618 that report a score; it scores higher than 95% of them. Its site EUI of 35.8 kBtu/ft² is about 30% 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 2.1 kgCO₂e/ft² is about half of the group average of 3.8 kgCO₂e/ft².

At 26,678 sq ft, it is about 80% below the average floor area of 136,346 sq ft for those buildings. It was built in 1951, 14 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 1400 Aspen Street NW's energy performance changed over time?

BuildingCensus holds 3 Washington, DC disclosures for 1400 Aspen Street NW, covering report years 2022–2024. Its ENERGY STAR score went from 86 in 2022 to 100 in 2024 (+14 points). Site EUI moved from 64.2 kBtu/ft² (2022) to 35.8 kBtu/ft² (2024), a 44% decrease. Reported emissions went from 104 tCO₂e to 55 tCO₂e over the same span (down 47%).

What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. 1400 Aspen Street NW's 35.8 kBtu/ft² across 26,678 sq ft works out to about 1 billion Btu (280 MWh-equivalent) in 2024. Its source EUI of 48.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 46,986 kWh of electricity, 7,961 therms of natural gas and 1,898 thousand gallons of water for the year.

Which law requires 1400 Aspen Street NW to report its energy use?

1400 Aspen Street NW 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:PM20293503:2024). 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.