490 E 23rd St

How does 490 E 23rd St 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. 490 E 23rd St's ENERGY STAR score of 25 compares with an average of 63 across the 22,829 that report a score; it scores higher than 15% of them and lower than 85%. Its site EUI of 106.8 kBtu/ft² is about 43% 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 6.5 kgCO₂e/ft² is about 25% above the group average of 5.2 kgCO₂e/ft².

At 33,702 sq ft, it is about 67% below the average floor area of 100,951 sq ft for those buildings. It was built in 1931, 21 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 490 E 23rd St's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 490 E 23rd St, covering report years 2022–2024. Its ENERGY STAR score went from 24 in 2022 to 25 in 2024 (+1 points). Site EUI moved from 116.3 kBtu/ft² (2022) to 106.8 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 228 tCO₂e to 219 tCO₂e over the same span (down 4%).

What does an ENERGY STAR score of 25 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 25 means the building performs better than about 25% of its national peers. BuildingCensus bands the score into report-card grades; 25 falls in band D — lowest band (1–54). It sits 50 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. 490 E 23rd St's 106.8 kBtu/ft² across 33,702 sq ft works out to about 3.6 billion Btu (1,055 MWh-equivalent) in 2024. Its source EUI of 134.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 124,466 kWh of electricity and 31,028 therms of natural gas for the year.

Which law requires 490 E 23rd St to report its energy use?

490 E 23rd St 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:6654617:2024). 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.