109 East 79th Street Condominium (109 East 79th Street)

How does 109 East 79th Street Condominium (109 East 79th Street) 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. 109 East 79th Street Condominium (109 East 79th Street)'s ENERGY STAR score of 89 compares with an average of 63 across the 22,829 that report a score; it scores higher than 75% of them and lower than 24%. Its site EUI of 40.7 kBtu/ft² is about half of 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 3.9 kgCO₂e/ft² is about 24% below the group average of 5.2 kgCO₂e/ft².

At 152,329 sq ft, it is about 51% above the average floor area of 100,951 sq ft for those buildings. It was built in 2022, 70 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 109 East 79th Street Condominium (109 East 79th Street)'s energy performance changed over time?

BuildingCensus holds 2 New York City disclosures for 109 East 79th Street Condominium (109 East 79th Street), covering report years 2023–2024. Its ENERGY STAR score was 89 in both 2023 and 2024. Site EUI moved from 38.8 kBtu/ft² (2023) to 40.7 kBtu/ft² (2024), an 5% increase. Reported emissions went from 533 tCO₂e to 600 tCO₂e over the same span (up 13%).

What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. 109 East 79th Street Condominium (109 East 79th Street)'s 40.7 kBtu/ft² across 152,329 sq ft works out to about 6.2 billion Btu (1,817 MWh-equivalent) in 2024. Its source EUI of 92.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,277,255 kWh of electricity and 18,483 therms of natural gas for the year.

Which law requires 109 East 79th Street Condominium (109 East 79th Street) to report its energy use?

109 East 79th Street Condominium (109 East 79th Street) 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:24317583:2024). 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.