DC509_eaves Tunlaw Gardens (tn09)

How does DC509_eaves Tunlaw Gardens (tn09) 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. DC509_eaves Tunlaw Gardens (tn09)'s ENERGY STAR score of 41 compares with an average of 72 across the 1,618 that report a score; it scores higher than 13% of them and lower than 87%. Its site EUI of 78.2 kBtu/ft² is about 53% above the average of 51.1 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 4.8 kgCO₂e/ft² is about 25% above the group average of 3.8 kgCO₂e/ft².

At 135,450 sq ft, it is roughly in line with the average floor area of 136,346 sq ft for those buildings. It was built in 1940, 25 years earlier 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 DC509_eaves Tunlaw Gardens (tn09)'s energy performance changed over time?

BuildingCensus holds 11 Washington, DC disclosures for DC509_eaves Tunlaw Gardens (tn09), covering report years 2014–2024. Its ENERGY STAR score went from 30 in 2014 to 41 in 2024 (+11 points); its best year on file was 2016, at 44. Site EUI moved from 89.1 kBtu/ft² (2014) to 78.2 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 869 tCO₂e to 643 tCO₂e over the same span (down 26%).

What does an ENERGY STAR score of 41 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 41 means the building performs better than about 41% of its national peers. BuildingCensus bands the score into report-card grades; 41 falls in band D — lowest band (1–54). It sits 34 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. DC509_eaves Tunlaw Gardens (tn09)'s 78.2 kBtu/ft² across 135,450 sq ft works out to about 10.6 billion Btu (3,104 MWh-equivalent) in 2024. Its source EUI of 112.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 678,632 kWh of electricity, 82,747 therms of natural gas and 5,719 thousand gallons of water for the year.

Which law requires DC509_eaves Tunlaw Gardens (tn09) to report its energy use?

DC509_eaves Tunlaw Gardens (tn09) 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:PM4156465:2024). 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.