Washington International School - Tregaron

How does Washington International School - Tregaron compare with other K-12 school buildings in Washington, DC?

The latest disclosures cover 333 K-12 school buildings in Washington, DC, out of 6,870 buildings citywide. Washington International School - Tregaron's ENERGY STAR score of 45 compares with an average of 44 across the 304 that report a score; it scores higher than 56% of them and lower than 42%. Its site EUI of 61.5 kBtu/ft² is roughly in line with the average of 64.1 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 roughly in line with the group average of 4.8 kgCO₂e/ft².

At 108,618 sq ft, it is roughly in line with the average floor area of 105,946 sq ft for those buildings. It was built in 1912, 37 years earlier than the group's average year built (1949). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².

How has Washington International School - Tregaron's energy performance changed over time?

BuildingCensus holds 6 Washington, DC disclosures for Washington International School - Tregaron, covering report years 2019–2024. Its ENERGY STAR score went from 61 in 2019 to 45 in 2024 (-16 points); its best year on file was 2020, at 80. Site EUI moved from 49.6 kBtu/ft² (2019) to 61.5 kBtu/ft² (2024), an 24% increase. Reported emissions went from 649 tCO₂e to 512 tCO₂e over the same span (down 21%).

What does an ENERGY STAR score of 45 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 45 means the building performs better than about 45% of its national peers. BuildingCensus bands the score into report-card grades; 45 falls in band D — lowest band (1–54). It sits 30 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. Washington International School - Tregaron's 61.5 kBtu/ft² across 108,618 sq ft works out to about 6.7 billion Btu (1,958 MWh-equivalent) in 2024. Its source EUI of 137.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,327,012 kWh of electricity, 21,542 therms of natural gas and 1,320 thousand gallons of water for the year.

Which law requires Washington International School - Tregaron to report its energy use?

Washington International School - Tregaron 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:PM14717733:2024). 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.