56 West 66th Street
Office in New York City, NY · 10023
At a glance
56 West 66th Street is a 60,156-square-foot office building in New York City, New York, built in 1901. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 73 out of 100 (grade B), a site energy-use intensity of 105.5 kBtu/ft² and 581 tCO₂e of greenhouse-gas emissions. That score is higher than 39% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 73 (band B) |
| Site EUI | 105.5 kBtu/ft² |
| Source EUI | 225.1 kBtu/ft² |
| GHG emissions | 581 tCO₂e |
| GHG intensity | 9.7 kgCO₂e/ft² |
| Electricity | 1,151,601 kWh |
| Natural gas | 24,160 therms |
| Gross floor area | 60,156 sq ft |
| Source record | nyc:4497808:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 73 | +7 | 105.5 kBtu/ft² | 581 tCO₂e |
| 2023 | 66 | -2 | 121.9 kBtu/ft² | 509 tCO₂e |
| 2022 | 68 | 121.1 kBtu/ft² | 405 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
- 56 West 66th Street
- City
- New York City
- State
- New York
- ZIP
- 10023
- Coordinates
- 40.77305, -73.98028
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 56 West 66th Street 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. 56 West 66th Street's ENERGY STAR score of 73 compares with an average of 72 across the 2,519 that report a score; it scores higher than 39% of them and lower than 59%. Its site EUI of 105.5 kBtu/ft² is about 64% above the average of 64.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 9.7 kgCO₂e/ft² is about 66% above the group average of 5.8 kgCO₂e/ft².
At 60,156 sq ft, it is about 71% below the average floor area of 205,440 sq ft for those buildings. It was built in 1901, 39 years earlier 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 56 West 66th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 56 West 66th Street, covering report years 2022–2024. Its ENERGY STAR score went from 68 in 2022 to 73 in 2024 (+5 points). Site EUI moved from 121.1 kBtu/ft² (2022) to 105.5 kBtu/ft² (2024), a 13% decrease. Reported emissions went from 405 tCO₂e to 581 tCO₂e over the same span (up 43%).
What does an ENERGY STAR score of 73 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 73 means the building performs better than about 73% of its national peers. BuildingCensus bands the score into report-card grades; 73 falls in band B — above median (70–84). It sits 2 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. 56 West 66th Street's 105.5 kBtu/ft² across 60,156 sq ft works out to about 6.3 billion Btu (1,860 MWh-equivalent) in 2024. Its source EUI of 225.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,151,601 kWh of electricity and 24,160 therms of natural gas for the year.
Which law requires 56 West 66th Street to report its energy use?
56 West 66th Street 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:4497808:2024). 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.
More office buildings in New York City
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- BUSHBURG Prop:117 GRATTAN STREET.· 60,000 sq ft · EUI 61.7 kBtu/ft²
- 4055 10 Avenue· 60,000 sq ft · score 29 (D)
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- 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 56 West 66th Street's energy grade?
56 West 66th Street scores 73 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 56 West 66th Street use?
Its 2024 site energy-use intensity was 105.5 kBtu/ft² (225.1 kBtu/ft² source) across 60,156 sq ft, including 1,151,601 kWh of electricity and 24,160 therms of natural gas.
What are 56 West 66th Street's carbon emissions?
56 West 66th Street reported 581 tCO₂e of greenhouse-gas emissions (9.7 kgCO₂e/ft²) for 2024.
Where is 56 West 66th Street?
56 West 66th Street is in New York City, New York 10023. Its coordinates are 40.77305, -73.98028 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 56 West 66th Street and when was it built?
56 West 66th Street has 60,156 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1901 as its year built. It is classed as office.
Is 56 West 66th Street 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, “56 West 66th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/56-west-66th-street-3a4dd675 (data as of October 2, 2026).