100 East End Avenue (The Chapin School)

How does 100 East End Avenue (The Chapin School) 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. 100 East End Avenue (The Chapin School)'s ENERGY STAR score of 59 compares with an average of 64 across the 2,052 that report a score; it scores higher than 35% of them and lower than 64%. Its site EUI of 69.3 kBtu/ft² is about 13% 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 5.9 kgCO₂e/ft² is about 23% above the group average of 4.8 kgCO₂e/ft².

At 208,787 sq ft, it is about twice the average floor area of 101,338 sq ft for those buildings. It was built in 1920, 33 years earlier 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 100 East End Avenue (The Chapin School)'s energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 100 East End Avenue (The Chapin School), covering report years 2022–2024. Its ENERGY STAR score went from 22 in 2022 to 59 in 2024 (+37 points); its best year on file was 2023, at 64. Site EUI moved from 129.2 kBtu/ft² (2022) to 69.3 kBtu/ft² (2024), a 46% decrease. Reported emissions went from 1,136 tCO₂e to 1,230 tCO₂e over the same span (up 8%).

What does an ENERGY STAR score of 59 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 59 means the building performs better than about 59% of its national peers. BuildingCensus bands the score into report-card grades; 59 falls in band C — below median (55–69). It sits 16 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. 100 East End Avenue (The Chapin School)'s 69.3 kBtu/ft² across 208,787 sq ft works out to about 14.5 billion Btu (4,240 MWh-equivalent) in 2024. Its source EUI of 135.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,181,266 kWh of electricity, 70,265 therms of natural gas and 2,786 thousand gallons of water for the year.

Which law requires 100 East End Avenue (The Chapin School) to report its energy use?

100 East End Avenue (The Chapin School) 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:2678953:2024). 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.