3240 Riverdale Avenue

How does 3240 Riverdale Avenue 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. 3240 Riverdale Avenue's ENERGY STAR score of 74 compares with an average of 63 across the 22,829 that report a score; it scores higher than 56% of them and lower than 43%. Its site EUI of 70.3 kBtu/ft² is roughly in line with 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 13% below the group average of 5.2 kgCO₂e/ft².

At 67,987 sq ft, it is about 33% below the average floor area of 100,951 sq ft for those buildings. It was built in 1970, 18 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 3240 Riverdale Avenue's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 3240 Riverdale Avenue, covering report years 2022–2024. Its ENERGY STAR score went from 36 in 2022 to 74 in 2024 (+38 points); its best year on file was 2023, at 76. Site EUI moved from 103.3 kBtu/ft² (2022) to 70.3 kBtu/ft² (2024), a 32% decrease. Reported emissions went from 400 tCO₂e to 309 tCO₂e over the same span (down 23%).

What does an ENERGY STAR score of 74 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 74 means the building performs better than about 74% of its national peers. BuildingCensus bands the score into report-card grades; 74 falls in band B — above median (70–84). It sits 1 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. 3240 Riverdale Avenue's 70.3 kBtu/ft² across 67,987 sq ft works out to about 4.8 billion Btu (1,401 MWh-equivalent) in 2024. Its source EUI of 96.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 261,879 kWh of electricity, 38,847 therms of natural gas and 5,109 thousand gallons of water for the year.

Which law requires 3240 Riverdale Avenue to report its energy use?

3240 Riverdale Avenue 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:2669053:2024). 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.