866 UN Plaza
Office in New York City, NY · 10017
At a glance
866 UN Plaza is a 429,451-square-foot office building in New York City, New York, built in 1966. In its 2023 New York City benchmarking disclosure it reported 0 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | 0 tCO₂e |
| GHG intensity | 0.0 kgCO₂e/ft² |
| Gross floor area | 429,451 sq ft |
| Source record | nyc:20939941:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | — | 0 tCO₂e | |
| 2022 | — | — | 0 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
Nearby benchmarked buildings
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- 399 Park Avenuescore 69
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- Waldorf Astoria Hotelscore 97
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- 919 Third Avenuescore —
Other - Technology/Science · 1,433,078 sq ft
- CHILD - 919 3 AVENUEscore —
Other - Technology/Science · 1,424,082 sq ft
See also: most efficient in New York City · biggest emitters
How does 866 UN Plaza 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. Its emissions intensity of 0.0 kgCO₂e/ft² is about 100% below the group average of 5.8 kgCO₂e/ft².
At 429,451 sq ft, it is about twice the average floor area of 205,440 sq ft for those buildings. It was built in 1966, 26 years later 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 866 UN Plaza's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 866 UN Plaza, covering report years 2022–2023. None of those years carry an ENERGY STAR score or site EUI.
Which law requires 866 UN Plaza to report its energy use?
866 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 2023 disclosure (source record nyc:20939941:2023). 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.
More office buildings in New York City
- URA Group - 120 West 45th St· 426,056 sq ft · score 61 (C)
- 533 and 521 WEST 57 STREET : [521-533 West 57th St.]· 423,251 sq ft · EUI 113.5 kBtu/ft²
- 747 Third Avenue· 422,846 sq ft · score 43 (D)
- Bldg - 4 - 34 35 STREET· 421,850 sq ft
- 575 Madison Ave.· 421,837 sq ft · score 81 (B)
- TRUSTEES OF THE MASONIC HALL· 421,647 sq ft · EUI 20.9 kBtu/ft²
- Office buildings in New York City· 3,384 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 866 UN Plaza's energy grade?
866 UN Plaza did not report an ENERGY STAR score in its 2023 disclosure.
How much energy does 866 UN Plaza use?
No energy-use intensity was reported for 2023.
What are 866 UN Plaza's carbon emissions?
866 UN Plaza reported 0 tCO₂e of greenhouse-gas emissions (0.0 kgCO₂e/ft²) for 2023.
Where is 866 UN Plaza?
866 UN Plaza is 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 866 UN Plaza and when was it built?
866 UN Plaza has 429,451 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1966 as its year built. It is classed as office.
Is 866 UN Plaza covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “866 UN Plaza, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/866-un-plaza-4223fa76 (data as of October 2, 2026).