999 North Capitol Street NE

How does 999 North Capitol Street NE compare with other office buildings in Washington, DC?

The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 999 North Capitol Street NE's ENERGY STAR score of 67 compares with an average of 70 across the 774 that report a score; it scores higher than 31% of them and lower than 68%. Its site EUI of 37.5 kBtu/ft² is about 33% below the average of 55.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.3 kgCO₂e/ft² is about 34% below the group average of 5.0 kgCO₂e/ft².

At 321,544 sq ft, it is about 49% above the average floor area of 216,135 sq ft for those buildings. Its 1973 construction date is close to the group's average year built (1974). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².

How has 999 North Capitol Street NE's energy performance changed over time?

BuildingCensus holds 11 Washington, DC disclosures for 999 North Capitol Street NE, covering report years 2014–2024. Its ENERGY STAR score went from 89 in 2014 to 67 in 2024 (-22 points); its best year on file was 2016, at 95. Site EUI moved from 51.2 kBtu/ft² (2014) to 37.5 kBtu/ft² (2024), a 27% decrease. Reported emissions went from 2,164 tCO₂e to 1,058 tCO₂e over the same span (down 51%).

What does an ENERGY STAR score of 67 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 67 means the building performs better than about 67% of its national peers. BuildingCensus bands the score into report-card grades; 67 falls in band C — below median (55–69). It sits 8 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. 999 North Capitol Street NE's 37.5 kBtu/ft² across 321,544 sq ft works out to about 12.1 billion Btu (3,534 MWh-equivalent) in 2024. Its source EUI of 105.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,534,116 kWh of electricity, 0 therms of natural gas and 2,104 thousand gallons of water for the year.

Which law requires 999 North Capitol Street NE to report its energy use?

999 North Capitol Street NE 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:PM1069662:2024). 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.