Cornerstone: 40 West 24th Street
Multifamily Housing in New York City, NY · 40 West 24th Street · 10010
At a glance
Cornerstone: 40 West 24th Street is a 74,711-square-foot multifamily housing building in New York City, New York, built in 1905. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 92 out of 100 (grade A), a site energy-use intensity of 44.5 kBtu/ft² and 277 tCO₂e of greenhouse-gas emissions. That score is higher than 79% 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 | 92 (band A) |
| Site EUI | 44.5 kBtu/ft² |
| Source EUI | 67.2 kBtu/ft² |
| GHG emissions | 277 tCO₂e |
| GHG intensity | 3.7 kgCO₂e/ft² |
| Electricity | 269,753 kWh |
| Natural gas | 3,593 therms |
| Water use | 1,232 kgal |
| Gross floor area | 74,711 sq ft |
| Source record | nyc:5832530:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 92 | -4 | 44.5 kBtu/ft² | 277 tCO₂e |
| 2023 | 96 | -1 | 38.9 kBtu/ft² | 238 tCO₂e |
| 2022 | 97 | 40.9 kBtu/ft² | 228 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
- 40 West 24th Street
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.74274, -73.99040
Within ~1 km
Nearby benchmarked buildings
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- 51 Madisonscore 79
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- One Madison Avenuescore —
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- Benchmarking Group - 3score —
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See also: most efficient in New York City · biggest emitters
How does Cornerstone: 40 West 24th Street 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. Cornerstone: 40 West 24th Street's ENERGY STAR score of 92 compares with an average of 63 across the 22,829 that report a score; it scores higher than 79% of them and lower than 20%. Its site EUI of 44.5 kBtu/ft² is about 41% 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 3.7 kgCO₂e/ft² is about 29% below the group average of 5.2 kgCO₂e/ft².
At 74,711 sq ft, it is about 26% below the average floor area of 100,951 sq ft for those buildings. It was built in 1905, 47 years earlier 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 Cornerstone: 40 West 24th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Cornerstone: 40 West 24th Street, covering report years 2022–2024. Its ENERGY STAR score went from 97 in 2022 to 92 in 2024 (-5 points); its best year on file was 2022, at 97. Site EUI moved from 40.9 kBtu/ft² (2022) to 44.5 kBtu/ft² (2024), an 9% increase. Reported emissions went from 228 tCO₂e to 277 tCO₂e over the same span (up 21%).
What does an ENERGY STAR score of 92 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 92 means the building performs better than about 92% of its national peers. BuildingCensus bands the score into report-card grades; 92 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. Cornerstone: 40 West 24th Street's 44.5 kBtu/ft² across 74,711 sq ft works out to about 3.3 billion Btu (974 MWh-equivalent) in 2024. Its source EUI of 67.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 269,753 kWh of electricity, 3,593 therms of natural gas and 1,232 thousand gallons of water for the year.
Which law requires Cornerstone: 40 West 24th Street to report its energy use?
Cornerstone: 40 West 24th 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:5832530:2024). 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 multifamily housing buildings in New York City
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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 Cornerstone: 40 West 24th Street's energy grade?
Cornerstone: 40 West 24th Street scores 92 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 Cornerstone: 40 West 24th Street use?
Its 2024 site energy-use intensity was 44.5 kBtu/ft² (67.2 kBtu/ft² source) across 74,711 sq ft, including 269,753 kWh of electricity and 3,593 therms of natural gas.
What are Cornerstone: 40 West 24th Street's carbon emissions?
Cornerstone: 40 West 24th Street reported 277 tCO₂e of greenhouse-gas emissions (3.7 kgCO₂e/ft²) for 2024.
Where is Cornerstone: 40 West 24th Street?
Cornerstone: 40 West 24th Street is in New York City, New York 10010. Its coordinates are 40.74274, -73.99040 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Cornerstone: 40 West 24th Street and when was it built?
Cornerstone: 40 West 24th Street has 74,711 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1905 as its year built. It is classed as multifamily housing.
Is Cornerstone: 40 West 24th 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, “Cornerstone: 40 West 24th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/cornerstone-40-west-24th-street-3c9efd39 (data as of October 2, 2026).