24 West 40th
Office in New York City, NY · 24 West 40th St. · 10018
At a glance
24 West 40th is a 88,694-square-foot office building at 24 West 40th St. in New York City, New York, built in 1925. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 89 out of 100 (grade A), a site energy-use intensity of 68.7 kBtu/ft² and 537 tCO₂e of greenhouse-gas emissions. That score is higher than 72% 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 | 89 (band A) |
| Site EUI | 68.7 kBtu/ft² |
| Source EUI | 111.7 kBtu/ft² |
| GHG emissions | 537 tCO₂e |
| GHG intensity | 6.0 kgCO₂e/ft² |
| Electricity | 615,120 kWh |
| Natural gas | 406 therms |
| Gross floor area | 88,694 sq ft |
| Source record | nyc:4936637:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 89 | +2 | 68.7 kBtu/ft² | 537 tCO₂e |
| 2023 | 87 | +4 | 66.6 kBtu/ft² | 524 tCO₂e |
| 2022 | 83 | 82.5 kBtu/ft² | 572 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
- 24 West 40th St.
- City
- New York City
- State
- New York
- ZIP
- 10018
- Coordinates
- 40.75263, -73.98286
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 24 West 40th 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. 24 West 40th's ENERGY STAR score of 89 compares with an average of 72 across the 2,519 that report a score; it scores higher than 72% of them and lower than 26%. Its site EUI of 68.7 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft². Its emissions intensity of 6.0 kgCO₂e/ft² is roughly in line with the group average of 5.8 kgCO₂e/ft².
At 88,694 sq ft, it is about 57% below the average floor area of 205,440 sq ft for those buildings. It was built in 1925, 15 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 24 West 40th's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 24 West 40th, covering report years 2022–2024. Its ENERGY STAR score went from 83 in 2022 to 89 in 2024 (+6 points). Site EUI moved from 82.5 kBtu/ft² (2022) to 68.7 kBtu/ft² (2024), a 17% decrease. Reported emissions went from 572 tCO₂e to 537 tCO₂e over the same span (down 6%).
What does an ENERGY STAR score of 89 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 89 means the building performs better than about 89% of its national peers. BuildingCensus bands the score into report-card grades; 89 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. 24 West 40th's 68.7 kBtu/ft² across 88,694 sq ft works out to about 6.1 billion Btu (1,786 MWh-equivalent) in 2024. Its source EUI of 111.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 615,120 kWh of electricity and 406 therms of natural gas for the year.
Which law requires 24 West 40th to report its energy use?
24 West 40th 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:4936637:2024). 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
- 413-421 West 14th Street· 88,592 sq ft · EUI 71.2 kBtu/ft²
- 112 Madison Avenue· 88,560 sq ft · score 77 (B)
- Feil - 820 Concourse Village West· 88,431 sq ft · score 42 (D)
- 22 W 48th St· 88,250 sq ft · score 99 (A)
- Green Light Energy Conservation:22 WEST 48 STREET· 88,250 sq ft · score 95 (A)
- 30 WEST 26 STREET - [30 West 26th Street]· 88,001 sq ft · score 82 (B)
- 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 24 West 40th's energy grade?
24 West 40th scores 89 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 24 West 40th use?
Its 2024 site energy-use intensity was 68.7 kBtu/ft² (111.7 kBtu/ft² source) across 88,694 sq ft, including 615,120 kWh of electricity and 406 therms of natural gas.
What are 24 West 40th's carbon emissions?
24 West 40th reported 537 tCO₂e of greenhouse-gas emissions (6.0 kgCO₂e/ft²) for 2024.
Where is 24 West 40th?
24 West 40th is at 24 West 40th St., in New York City, New York 10018. Its coordinates are 40.75263, -73.98286 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 24 West 40th and when was it built?
24 West 40th has 88,694 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1925 as its year built. It is classed as office.
Is 24 West 40th 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, “24 West 40th, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/24-west-40th-ba450009 (data as of October 2, 2026).