1700 Pennsylvania Avenue NW (Mills)

How does 1700 Pennsylvania Avenue NW (Mills) compare with other office buildings in Washington, DC?

The latest disclosures cover 899 office buildings in Washington, DC, out of 6,870 buildings citywide. 1700 Pennsylvania Avenue NW (Mills)'s ENERGY STAR score of 81 compares with an average of 70 across the 774 that report a score; it scores higher than 66% of them and lower than 30%. Its site EUI of 37.9 kBtu/ft² is about 32% 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 33% below the group average of 5.0 kgCO₂e/ft².

At 237,486 sq ft, it is roughly in line with the average floor area of 216,135 sq ft for those buildings. It was built in 1965, 9 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 1700 Pennsylvania Avenue NW (Mills)'s energy performance changed over time?

BuildingCensus holds 13 Washington, DC disclosures for 1700 Pennsylvania Avenue NW (Mills), covering report years 2012–2024. Its ENERGY STAR score went from 67 in 2012 to 81 in 2024 (+14 points); its best year on file was 2023, at 87. Site EUI moved from 94.9 kBtu/ft² (2012) to 37.9 kBtu/ft² (2024), a 60% decrease. Reported emissions went from 1,942 tCO₂e to 790 tCO₂e over the same span (down 59%).

What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 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. 1700 Pennsylvania Avenue NW (Mills)'s 37.9 kBtu/ft² across 237,486 sq ft works out to about 9 billion Btu (2,638 MWh-equivalent) in 2024. Its source EUI of 106.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,638,299 kWh of electricity, 6 therms of natural gas and 2,966 thousand gallons of water for the year.

Which law requires 1700 Pennsylvania Avenue NW (Mills) to report its energy use?

1700 Pennsylvania Avenue NW (Mills) 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:PM1327939:2024). 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.