HCZ - 245 W 129th St.

How does HCZ - 245 W 129th St. compare with other K-12 school buildings in New York City?

The latest disclosures cover 2,301 K-12 school buildings in New York City, out of 48,310 buildings citywide. HCZ - 245 W 129th St.'s ENERGY STAR score of 85 compares with an average of 64 across the 2,052 that report a score; it scores higher than 75% of them and lower than 23%. Its site EUI of 113.2 kBtu/ft² is about 85% above the average of 61.3 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 10.3 kgCO₂e/ft² is about twice the group average of 4.8 kgCO₂e/ft².

At 135,645 sq ft, it is about 34% above the average floor area of 101,338 sq ft for those buildings. It was built in 2011, 58 years later than the group's average year built (1954). Across all 24 jurisdictions BuildingCensus covers, the 6,548 K-12 school buildings average an ENERGY STAR score of 64 and a site EUI of 52.7 kBtu/ft².

How has HCZ - 245 W 129th St.'s energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for HCZ - 245 W 129th St., covering report years 2022–2024. Its ENERGY STAR score was 85 in both 2022 and 2024. Site EUI moved from 119.1 kBtu/ft² (2022) to 113.2 kBtu/ft² (2024), a 5% decrease. Reported emissions went from 1,140 tCO₂e to 1,397 tCO₂e over the same span (up 23%).

What does an ENERGY STAR score of 85 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 85 means the building performs better than about 85% of its national peers. BuildingCensus bands the score into report-card grades; 85 falls in band A — high performer (85–100). 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. HCZ - 245 W 129th St.'s 113.2 kBtu/ft² across 135,645 sq ft works out to about 15.4 billion Btu (4,500 MWh-equivalent) in 2024. Its source EUI of 240.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,751,496 kWh of electricity, 59,632 therms of natural gas and 1,778 thousand gallons of water for the year.

Which law requires HCZ - 245 W 129th St. to report its energy use?

HCZ - 245 W 129th 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:8140323:2024). 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.