National Energy Cost Services Inc:235 WEST 23 STREET

How does National Energy Cost Services Inc:235 WEST 23 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. National Energy Cost Services Inc:235 WEST 23 STREET's ENERGY STAR score of 83 compares with an average of 72 across the 2,519 that report a score; it scores higher than 58% of them and lower than 39%. Its site EUI of 60.8 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.3 kgCO₂e/ft² is about 25% below the group average of 5.8 kgCO₂e/ft².

At 49,183 sq ft, it is about 76% below the average floor area of 205,440 sq ft for those buildings. It was built in 1906, 34 years earlier 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.

What does an ENERGY STAR score of 83 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 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 falls in band B — above median (70–84). 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. National Energy Cost Services Inc:235 WEST 23 STREET's 60.8 kBtu/ft² across 49,183 sq ft works out to about 3 billion Btu (876 MWh-equivalent) in 2024. Its source EUI of 94.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 255,460 kWh of electricity, 21,170 therms of natural gas and 787 thousand gallons of water for the year.

Which law requires National Energy Cost Services Inc:235 WEST 23 STREET to report its energy use?

National Energy Cost Services Inc:235 WEST 23 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:57872692:2024). 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.