Williamsburg Houses: Buildings 15-20

How does Williamsburg Houses: Buildings 15-20 compare with other multifamily housing buildings in New York City?

The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. Williamsburg Houses: Buildings 15-20's ENERGY STAR score of 6 compares with an average of 63 across the 22,829 that report a score; it scores higher than 5% of them and lower than 94%. Its site EUI of 516.5 kBtu/ft² is about 590% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 27.4 kgCO₂e/ft² is about 427% above the group average of 5.2 kgCO₂e/ft².

At 73,445 sq ft, it is about 27% below the average floor area of 100,951 sq ft for those buildings. It was built in 1936, 16 years earlier than the group's average year built (1952). 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 Williamsburg Houses: Buildings 15-20's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for Williamsburg Houses: Buildings 15-20, covering report years 2022–2024. Its ENERGY STAR score went from 3 in 2022 to 6 in 2024 (+3 points); its best year on file was 2023, at 28. Site EUI moved from 151.9 kBtu/ft² (2022) to 516.5 kBtu/ft² (2024), an 240% increase. Reported emissions went from 3,771 tCO₂e to 2,015 tCO₂e over the same span (down 47%).

What does an ENERGY STAR score of 6 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 6 means the building performs better than about 6% of its national peers. BuildingCensus bands the score into report-card grades; 6 falls in band D — lowest band (1–54). It sits 69 points below 75, the threshold for ENERGY STAR certification. In New York City, 43% 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. Williamsburg Houses: Buildings 15-20's 516.5 kBtu/ft² across 73,445 sq ft works out to about 37.9 billion Btu (11,117 MWh-equivalent) in 2024. Its source EUI of 542.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 379,345 therms of natural gas for the year.

Which law requires Williamsburg Houses: Buildings 15-20 to report its energy use?

Williamsburg Houses: Buildings 15-20 reports under Local Law 84 (LL84), the legal basis of New York City's Energy and Water Data Disclosure program, which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record nyc:10790829:2024). Under Local Law 97, buildings over 25,000 sq ft face carbon caps with fines of $268 per metric ton of CO₂e over the limit, phasing in from 2024.