860-866-870 UN Plaza
Multifamily Housing in New York City, NY · 866 UN Plaza · 10017
At a glance
860-866-870 UN Plaza is a 1,308,418-square-foot multifamily housing building at 866 UN Plaza in New York City, New York, built in 1966. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 93 out of 100 (grade A), a site energy-use intensity of 33.5 kBtu/ft² and 4,199 tCO₂e of greenhouse-gas emissions. That score is higher than 80% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 93 (band A) |
| Site EUI | 33.5 kBtu/ft² |
| Source EUI | 72.7 kBtu/ft² |
| GHG emissions | 4,199 tCO₂e |
| GHG intensity | 3.2 kgCO₂e/ft² |
| Electricity | 7,798,418 kWh |
| Natural gas | 4,729 therms |
| Water use | 23,983 kgal |
| Gross floor area | 1,308,418 sq ft |
| Source record | nyc:15101165:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 93 | +14 | 33.5 kBtu/ft² | 4,199 tCO₂e |
| 2023 | 79 | +38 | 47.8 kBtu/ft² | 5,386 tCO₂e |
| 2022 | 41 | 87.8 kBtu/ft² | 8,210 tCO₂e |
Compliance context
Local Law 84 (LL84)
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.
Ownership
No owning organisation shown. Names of private individuals in the disclosure are not published here.
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Location
- Address
- 866 UN Plaza
- City
- New York City
- State
- New York
- ZIP
- 10017
- Coordinates
- 40.75292, -73.96683
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 860-866-870 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. 860-866-870 UN Plaza's ENERGY STAR score of 93 compares with an average of 63 across the 22,829 that report a score; it scores higher than 80% of them and lower than 18%. Its site EUI of 33.5 kBtu/ft² is about 55% below 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 3.2 kgCO₂e/ft² is about 38% below the group average of 5.2 kgCO₂e/ft².
At 1,308,418 sq ft, it is about 1196% above the average floor area of 100,951 sq ft for those buildings. It was built in 1966, 14 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 860-866-870 UN Plaza's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 860-866-870 UN Plaza, covering report years 2022–2024. Its ENERGY STAR score went from 41 in 2022 to 93 in 2024 (+52 points). Site EUI moved from 87.8 kBtu/ft² (2022) to 33.5 kBtu/ft² (2024), a 62% decrease. Reported emissions went from 8,210 tCO₂e to 4,199 tCO₂e over the same span (down 49%).
What does an ENERGY STAR score of 93 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 93 means the building performs better than about 93% of its national peers. BuildingCensus bands the score into report-card grades; 93 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. 860-866-870 UN Plaza's 33.5 kBtu/ft² across 1,308,418 sq ft works out to about 43.8 billion Btu (12,846 MWh-equivalent) in 2024. Its source EUI of 72.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 7,798,418 kWh of electricity, 4,729 therms of natural gas and 23,983 thousand gallons of water for the year.
Which law requires 860-866-870 UN Plaza to report its energy use?
860-866-870 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:15101165:2024). 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.
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- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
- Most efficient large buildings in New York City
- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is 860-866-870 UN Plaza's energy grade?
860-866-870 UN Plaza scores 93 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 860-866-870 UN Plaza use?
Its 2024 site energy-use intensity was 33.5 kBtu/ft² (72.7 kBtu/ft² source) across 1,308,418 sq ft, including 7,798,418 kWh of electricity and 4,729 therms of natural gas.
What are 860-866-870 UN Plaza's carbon emissions?
860-866-870 UN Plaza reported 4,199 tCO₂e of greenhouse-gas emissions (3.2 kgCO₂e/ft²) for 2024.
Where is 860-866-870 UN Plaza?
860-866-870 UN Plaza is at 866 UN Plaza, in New York City, New York 10017. Its coordinates are 40.75292, -73.96683 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 860-866-870 UN Plaza and when was it built?
860-866-870 UN Plaza has 1,308,418 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1966 as its year built. It is classed as multifamily housing.
Is 860-866-870 UN Plaza covered by Local Law 84 (LL84)?
Yes — it appears in the 2024 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
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About this data
Source: Energy and Water Data Disclosure (Local Law 84 (LL84)), as published October 2, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “860-866-870 UN Plaza, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/860-866-870-un-plaza-8abd2ecc (data as of October 2, 2026).