Eleven Hundred Connecticut Avenue

How does Eleven Hundred Connecticut Avenue compare with other office buildings in Washington, DC?

The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. Eleven Hundred Connecticut Avenue's ENERGY STAR score of 76 compares with an average of 70 across the 774 that report a score; it scores higher than 50% of them and lower than 47%. Its site EUI of 50.8 kBtu/ft² is roughly in line with 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 3.6 kgCO₂e/ft² is about 28% below the group average of 5.0 kgCO₂e/ft².

At 163,512 sq ft, it is about 24% below the average floor area of 216,135 sq ft for those buildings. It was built in 1968, 6 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 Eleven Hundred Connecticut Avenue's energy performance changed over time?

BuildingCensus holds 13 Washington, DC disclosures for Eleven Hundred Connecticut Avenue, covering report years 2012–2024. Its ENERGY STAR score went from 68 in 2014 to 76 in 2024 (+8 points); its best year on file was 2023, at 81. Site EUI moved from 79.4 kBtu/ft² (2014) to 50.8 kBtu/ft² (2024), a 36% decrease. Reported emissions went from 1,611 tCO₂e to 585 tCO₂e over the same span (down 64%).

What does an ENERGY STAR score of 76 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 76 means the building performs better than about 76% of its national peers. BuildingCensus bands the score into report-card grades; 76 falls in band B — above median (70–84). 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. Eleven Hundred Connecticut Avenue's 50.8 kBtu/ft² across 163,512 sq ft works out to about 8.3 billion Btu (2,434 MWh-equivalent) in 2024. Its source EUI of 111.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,579,344 kWh of electricity, 29,252 therms of natural gas and 1,856 thousand gallons of water for the year.

Which law requires Eleven Hundred Connecticut Avenue to report its energy use?

Eleven Hundred Connecticut Avenue 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:PM3496813:2024). 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.