2144 Prospect Realty LLC - 2144 Prospect Ave

How does 2144 Prospect Realty LLC - 2144 Prospect Ave 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. 2144 Prospect Realty LLC - 2144 Prospect Ave's ENERGY STAR score of 96 compares with an average of 63 across the 22,829 that report a score; it scores higher than 84% of them and lower than 14%. Its site EUI of 54.1 kBtu/ft² is about 28% 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 4.5 kgCO₂e/ft² is about 14% below the group average of 5.2 kgCO₂e/ft².

At 26,260 sq ft, it is about 74% below the average floor area of 100,951 sq ft for those buildings. It was built in 1931, 21 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 2144 Prospect Realty LLC - 2144 Prospect Ave's energy performance changed over time?

BuildingCensus holds 2 New York City disclosures for 2144 Prospect Realty LLC - 2144 Prospect Ave, covering report years 2023–2024. Its ENERGY STAR score went from 100 in 2023 to 96 in 2024 (-4 points); its best year on file was 2023, at 100. Site EUI moved from 22.5 kBtu/ft² (2023) to 54.1 kBtu/ft² (2024), an 140% increase. Reported emissions went from 52 tCO₂e to 117 tCO₂e over the same span (up 125%).

What does an ENERGY STAR score of 96 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 96 means the building performs better than about 96% of its national peers. BuildingCensus bands the score into report-card grades; 96 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 2144 Prospect Realty LLC - 2144 Prospect Ave's 54.1 kBtu/ft² across 26,260 sq ft works out to about 1.4 billion Btu (416 MWh-equivalent) in 2024. Its source EUI of 77.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 97,801 kWh of electricity, 1,080 therms of natural gas and 4,074 thousand gallons of water for the year.

Which law requires 2144 Prospect Realty LLC - 2144 Prospect Ave to report its energy use?

2144 Prospect Realty LLC - 2144 Prospect Ave 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:35021023:2024). 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.