345 East 73rd St Owners Corp (345 East 73rd Street)

How does 345 East 73rd St Owners Corp (345 East 73rd 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. 345 East 73rd St Owners Corp (345 East 73rd Street)'s ENERGY STAR score of 11 compares with an average of 63 across the 22,829 that report a score; it scores higher than 8% of them and lower than 92%. Its site EUI of 109.2 kBtu/ft² is about 46% 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 6.8 kgCO₂e/ft² is about 30% above the group average of 5.2 kgCO₂e/ft².

At 172,130 sq ft, it is about 71% above the average floor area of 100,951 sq ft for those buildings. It was built in 1961, 9 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 345 East 73rd St Owners Corp (345 East 73rd Street)'s energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 345 East 73rd St Owners Corp (345 East 73rd Street), covering report years 2022–2024. Its ENERGY STAR score went from 73 in 2022 to 11 in 2024 (-62 points); its best year on file was 2023, at 80. Site EUI moved from 62.8 kBtu/ft² (2022) to 109.2 kBtu/ft² (2024), an 74% increase. Reported emissions went from 601 tCO₂e to 1,163 tCO₂e over the same span (up 93%).

What does an ENERGY STAR score of 11 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 11 means the building performs better than about 11% of its national peers. BuildingCensus bands the score into report-card grades; 11 falls in band D — lowest band (1–54). It sits 64 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. 345 East 73rd St Owners Corp (345 East 73rd Street)'s 109.2 kBtu/ft² across 172,130 sq ft works out to about 18.8 billion Btu (5,509 MWh-equivalent) in 2024. Its source EUI of 141.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 776,459 kWh of electricity and 161,498 therms of natural gas for the year.

Which law requires 345 East 73rd St Owners Corp (345 East 73rd Street) to report its energy use?

345 East 73rd St Owners Corp (345 East 73rd 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:2797250:2024). 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.