204 East 23rd Street

How does 204 East 23rd Street compare with other office buildings in New York City?

The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. 204 East 23rd Street's ENERGY STAR score of 41 compares with an average of 72 across the 2,519 that report a score; it scores higher than 12% of them and lower than 87%. Its site EUI of 74.5 kBtu/ft² is about 16% above the average of 64.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.7 kgCO₂e/ft² is about 16% above the group average of 5.8 kgCO₂e/ft².

At 32,369 sq ft, it is about 84% below the average floor area of 205,440 sq ft for those buildings. It was built in 1959, 19 years later than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².

How has 204 East 23rd Street's energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 204 East 23rd Street, covering report years 2022–2024. Its ENERGY STAR score was 41 in both 2022 and 2024. Site EUI moved from 80.7 kBtu/ft² (2022) to 74.5 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 182 tCO₂e to 218 tCO₂e over the same span (up 20%).

What does an ENERGY STAR score of 41 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 41 means the building performs better than about 41% of its national peers. BuildingCensus bands the score into report-card grades; 41 falls in band D — lowest band (1–54). It sits 34 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. 204 East 23rd Street's 74.5 kBtu/ft² across 32,369 sq ft works out to about 2.4 billion Btu (707 MWh-equivalent) in 2024. Its source EUI of 156.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 423,377 kWh of electricity, 9,668 therms of natural gas and 310 thousand gallons of water for the year.

Which law requires 204 East 23rd Street to report its energy use?

204 East 23rd 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:7527459:2024). 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.