1800 K Street

How does 1800 K Street compare with other office buildings in Washington, DC?

The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 1800 K Street's ENERGY STAR score of 85 compares with an average of 70 across the 774 that report a score; it scores higher than 77% of them and lower than 19%. Its site EUI of 34.9 kBtu/ft² is about 37% 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 3.1 kgCO₂e/ft² is about 39% below the group average of 5.0 kgCO₂e/ft².

At 237,219 sq ft, it is roughly in line with the average floor area of 216,135 sq ft for those buildings. It was built in 1971, 3 years earlier than 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 1800 K Street's energy performance changed over time?

BuildingCensus holds 13 Washington, DC disclosures for 1800 K Street, covering report years 2012–2024. Its ENERGY STAR score went from 75 in 2012 to 85 in 2024 (+10 points); its best year on file was 2013, at 100. Site EUI moved from 60.9 kBtu/ft² (2012) to 34.9 kBtu/ft² (2024), a 43% decrease. Reported emissions went from 1,938 tCO₂e to 726 tCO₂e over the same span (down 63%).

What does an ENERGY STAR score of 85 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 85 means the building performs better than about 85% of its national peers. BuildingCensus bands the score into report-card grades; 85 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. 1800 K Street's 34.9 kBtu/ft² across 237,219 sq ft works out to about 8.3 billion Btu (2,426 MWh-equivalent) in 2024. Its source EUI of 97.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,426,100 kWh of electricity, 0 therms of natural gas and 1,799 thousand gallons of water for the year.

Which law requires 1800 K Street to report its energy use?

1800 K Street 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:PM1419693:2024). 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.