Milestone 2501 N Street S.E.

How does Milestone 2501 N Street S.E. 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. Milestone 2501 N Street S.E.'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 33.8 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 2.4 kgCO₂e/ft² is about 38% below the group average of 3.8 kgCO₂e/ft².

At 34,104 sq ft, it is about 75% below the average floor area of 136,346 sq ft for those buildings. It was built in 1942, 23 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 Milestone 2501 N Street S.E.'s energy performance changed over time?

BuildingCensus holds 3 Washington, DC disclosures for Milestone 2501 N Street S.E., covering report years 2022–2024. Its ENERGY STAR score went from 100 in 2022 to 90 in 2024 (-10 points); its best year on file was 2022, at 100. Site EUI moved from 16.3 kBtu/ft² (2022) to 33.8 kBtu/ft² (2024), an 107% increase. Reported emissions went from 34 tCO₂e to 81 tCO₂e over the same span (up 139%).

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. Milestone 2501 N Street S.E.'s 33.8 kBtu/ft² across 34,104 sq ft works out to about 1.2 billion Btu (338 MWh-equivalent) in 2024. Its source EUI of 73.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 216,410 kWh of electricity, 4,139 therms of natural gas and 1,504 thousand gallons of water for the year.

Which law requires Milestone 2501 N Street S.E. to report its energy use?

Milestone 2501 N Street S.E. 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:PM21609461:2024). 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.