Connecticut Building

How does Connecticut Building compare with other office buildings in Washington, DC?

The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. Connecticut Building'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 48.8 kBtu/ft² is about 12% 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 4.0 kgCO₂e/ft² is about 20% below the group average of 5.0 kgCO₂e/ft².

At 197,801 sq ft, it is roughly in line with the average floor area of 216,135 sq ft for those buildings. Its 1975 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 Connecticut Building's energy performance changed over time?

BuildingCensus holds 13 Washington, DC disclosures for Connecticut Building, covering report years 2012–2024. Its ENERGY STAR score went from 86 in 2012 to 85 in 2024 (-1 points); its best year on file was 2012, at 86. Site EUI moved from 67.3 kBtu/ft² (2012) to 48.8 kBtu/ft² (2024), a 27% decrease. Reported emissions went from 1,790 tCO₂e to 795 tCO₂e over the same span (down 56%).

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. Connecticut Building's 48.8 kBtu/ft² across 197,801 sq ft works out to about 9.7 billion Btu (2,829 MWh-equivalent) in 2024. Its source EUI of 108.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,907,298 kWh of electricity, 4,582 therms of natural gas and 1,987 thousand gallons of water for the year.

Which law requires Connecticut Building to report its energy use?

Connecticut Building 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:PM1413138:2024). 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.