3105 Decatur Ave

How does 3105 Decatur 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. 3105 Decatur Ave's ENERGY STAR score of 42 compares with an average of 63 across the 22,829 that report a score; it scores higher than 25% of them and lower than 74%. Its site EUI of 91.8 kBtu/ft² is about 23% 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 7.5 kgCO₂e/ft² is about 45% above the group average of 5.2 kgCO₂e/ft².

At 64,740 sq ft, it is about 36% below the average floor area of 100,951 sq ft for those buildings. It was built in 1927, 25 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 3105 Decatur Ave's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 3105 Decatur Ave, covering report years 2022–2024. Its ENERGY STAR score went from 28 in 2022 to 42 in 2024 (+14 points). Site EUI moved from 111.2 kBtu/ft² (2022) to 91.8 kBtu/ft² (2024), a 17% decrease. Reported emissions went from 550 tCO₂e to 487 tCO₂e over the same span (down 12%).

What does an ENERGY STAR score of 42 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 42 means the building performs better than about 42% of its national peers. BuildingCensus bands the score into report-card grades; 42 falls in band D — lowest band (1–54). It sits 33 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. 3105 Decatur Ave's 91.8 kBtu/ft² across 64,740 sq ft works out to about 5.9 billion Btu (1,742 MWh-equivalent) in 2024. Its source EUI of 121.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 305,686 kWh of electricity and 1,026 therms of natural gas for the year.

Which law requires 3105 Decatur Ave to report its energy use?

3105 Decatur 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:2794965:2024). 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.