305 West End Avenue

How does 305 West End Avenue compare with other senior living community buildings in New York City?

The latest disclosures cover 296 senior living community buildings in New York City, out of 48,310 buildings citywide. 305 West End Avenue's ENERGY STAR score of 7 compares with an average of 57 across the 229 that report a score; it scores higher than 10% of them and lower than 90%. Its site EUI of 55.6 kBtu/ft² is about half of the average of 112.0 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 6.0 kgCO₂e/ft² is about 29% below the group average of 8.5 kgCO₂e/ft².

At 184,060 sq ft, it is about 69% above the average floor area of 108,590 sq ft for those buildings. It was built in 1923, 51 years earlier than the group's average year built (1974). Across all 24 jurisdictions BuildingCensus covers, the 1,181 senior living community buildings average an ENERGY STAR score of 71 and a site EUI of 73.6 kBtu/ft².

How has 305 West End Avenue's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 305 West End Avenue, covering report years 2022–2024. Its ENERGY STAR score went from 6 in 2022 to 7 in 2024 (+1 points). Site EUI moved from 56.3 kBtu/ft² (2022) to 55.6 kBtu/ft² (2024), a 1% decrease. Reported emissions went from 851 tCO₂e to 1,110 tCO₂e over the same span (up 30%).

What does an ENERGY STAR score of 7 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 7 means the building performs better than about 7% of its national peers. BuildingCensus bands the score into report-card grades; 7 falls in band D — lowest band (1–54). It sits 68 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. 305 West End Avenue's 55.6 kBtu/ft² across 184,060 sq ft works out to about 10.2 billion Btu (2,999 MWh-equivalent) in 2024. Its source EUI of 144.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,669,056 kWh of electricity and 10,172 therms of natural gas for the year.

Which law requires 305 West End Avenue to report its energy use?

305 West End 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:12902070:2024). 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.