Ashton at Judiciary Square (Whole Building)

How does Ashton at Judiciary Square (Whole Building) compare with other multifamily housing buildings in Washington, DC?

The latest disclosures cover 1,799 multifamily housing buildings in Washington, DC, out of 6,870 buildings citywide. Ashton at Judiciary Square (Whole Building)'s ENERGY STAR score of 33 compares with an average of 72 across the 1,618 that report a score; it scores higher than 9% of them and lower than 91%. Its site EUI of 42.5 kBtu/ft² is about 17% below the average of 51.1 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.7 kgCO₂e/ft² is about 24% above the group average of 3.8 kgCO₂e/ft².

At 79,933 sq ft, it is about 41% below the average floor area of 136,346 sq ft for those buildings. It was built in 2011, 46 years later than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².

How has Ashton at Judiciary Square (Whole Building)'s energy performance changed over time?

BuildingCensus holds 3 Washington, DC disclosures for Ashton at Judiciary Square (Whole Building), covering report years 2015–2017. Its ENERGY STAR score went from 34 in 2015 to 33 in 2017 (-1 points); its best year on file was 2016, at 44. Site EUI moved from 51.5 kBtu/ft² (2015) to 42.5 kBtu/ft² (2017), a 17% decrease. Reported emissions went from 484 tCO₂e to 377 tCO₂e over the same span (down 22%).

What does an ENERGY STAR score of 33 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 33 means the building performs better than about 33% of its national peers. BuildingCensus bands the score into report-card grades; 33 falls in band D — lowest band (1–54). It sits 42 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. Ashton at Judiciary Square (Whole Building)'s 42.5 kBtu/ft² across 79,933 sq ft works out to about 3.4 billion Btu (996 MWh-equivalent) in 2017. Its source EUI of 133.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 996,198 kWh of electricity, 18 therms of natural gas and 2,030 thousand gallons of water for the year.

Which law requires Ashton at Judiciary Square (Whole Building) to report its energy use?

Ashton at Judiciary Square (Whole 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 2017 disclosure (source record dc:PM4900757:2017). 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.