100 United Nations Plaza Condominium (100 UN Plaza)

How does 100 United Nations Plaza Condominium (100 UN Plaza) compare with other multifamily housing buildings in New York City?

The latest disclosures cover 33,022 multifamily housing buildings in New York City, out of 48,310 buildings citywide. 100 United Nations Plaza Condominium (100 UN Plaza)'s ENERGY STAR score of 42 compares with an average of 63 across the 22,829 that report a score; it scores higher than 25% of them and lower than 74%. Its site EUI of 70.8 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.5 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².

At 470,392 sq ft, it is about 366% above the average floor area of 100,951 sq ft for those buildings. It was built in 1984, 32 years later than the group's average year built (1952). Across all 24 jurisdictions BuildingCensus covers, the 59,945 multifamily housing buildings average an ENERGY STAR score of 70 and a site EUI of 59.0 kBtu/ft².

How has 100 United Nations Plaza Condominium (100 UN Plaza)'s energy performance changed over time?

BuildingCensus holds 3 New York City disclosures for 100 United Nations Plaza Condominium (100 UN Plaza), covering report years 2022–2024. Its ENERGY STAR score went from 29 in 2022 to 42 in 2024 (+13 points); its best year on file was 2023, at 59. Site EUI moved from 81.5 kBtu/ft² (2022) to 70.8 kBtu/ft² (2024), a 13% decrease. Reported emissions went from 2,715 tCO₂e to 2,606 tCO₂e over the same span (down 4%).

What does an ENERGY STAR score of 42 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 42 means the building performs better than about 42% of its national peers. BuildingCensus bands the score into report-card grades; 42 falls in band D — lowest band (1–54). It sits 33 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 United Nations Plaza Condominium (100 UN Plaza)'s 70.8 kBtu/ft² across 470,392 sq ft works out to about 33.3 billion Btu (9,760 MWh-equivalent) in 2024. Its source EUI of 113.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,433,129 kWh of electricity, 6,533 therms of natural gas and 19,128 thousand gallons of water for the year.

Which law requires 100 United Nations Plaza Condominium (100 UN Plaza) to report its energy use?

100 United Nations Plaza Condominium (100 UN Plaza) 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:3529389:2024). 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.