251 west 39th street realty co

How does 251 west 39th street realty co 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. 251 west 39th street realty co's ENERGY STAR score of 70 compares with an average of 72 across the 2,519 that report a score; it scores higher than 35% of them and lower than 64%. Its site EUI of 60.4 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 6.3 kgCO₂e/ft² is roughly in line with the group average of 5.8 kgCO₂e/ft².

At 117,554 sq ft, it is about 43% below the average floor area of 205,440 sq ft for those buildings. It was built in 1920, 20 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.

How has 251 west 39th street realty co's energy performance changed over time?

BuildingCensus holds 2 New York City disclosures for 251 west 39th street realty co, covering report years 2023–2024. Its ENERGY STAR score went from 98 in 2023 to 70 in 2024 (-28 points); its best year on file was 2023, at 98. Site EUI moved from 29.8 kBtu/ft² (2023) to 60.4 kBtu/ft² (2024), an 103% increase. Reported emissions went from 321 tCO₂e to 743 tCO₂e over the same span (up 132%).

What does an ENERGY STAR score of 70 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 70 means the building performs better than about 70% of its national peers. BuildingCensus bands the score into report-card grades; 70 falls in band B — above median (70–84). It sits 5 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. 251 west 39th street realty co's 60.4 kBtu/ft² across 117,554 sq ft works out to about 7.1 billion Btu (2,081 MWh-equivalent) in 2024. Its source EUI of 141.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,553,657 kWh of electricity and 8 therms of natural gas for the year.

Which law requires 251 west 39th street realty co to report its energy use?

251 west 39th street realty co 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:29309470:2024). 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.