Cobble Hill Mews

How does Cobble Hill Mews 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. Cobble Hill Mews's ENERGY STAR score of 45 compares with an average of 63 across the 22,829 that report a score; it scores higher than 28% of them and lower than 72%. Its site EUI of 55.6 kBtu/ft² is about 26% below the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.2 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².

At 44,383 sq ft, it is about 56% below the average floor area of 100,951 sq ft for those buildings. It was built in 2008, 56 years later 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 Cobble Hill Mews's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for Cobble Hill Mews, covering report years 2022–2024. Its ENERGY STAR score went from 91 in 2022 to 45 in 2024 (-46 points); its best year on file was 2022, at 91. Site EUI moved from 40.4 kBtu/ft² (2022) to 55.6 kBtu/ft² (2024), an 38% increase. Reported emissions went from 146 tCO₂e to 231 tCO₂e over the same span (up 58%).

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 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. Cobble Hill Mews's 55.6 kBtu/ft² across 44,383 sq ft works out to about 2.5 billion Btu (723 MWh-equivalent) in 2024. Its source EUI of 121.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 470,852 kWh of electricity, 8,615 therms of natural gas and 1,621 thousand gallons of water for the year.

Which law requires Cobble Hill Mews to report its energy use?

Cobble Hill Mews 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:9446368:2024). 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.