523 West 24 Street
Office in New York City, NY · 10011
At a glance
523 West 24 Street is a 27,106-square-foot office building in New York City, New York, built in 1930. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 97.5 kBtu/ft² and 222 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 97.5 kBtu/ft² |
| Source EUI | 187.2 kBtu/ft² |
| GHG emissions | 222 tCO₂e |
| GHG intensity | 8.2 kgCO₂e/ft² |
| Electricity | 384,942 kWh |
| Natural gas | 13,306 therms |
| Water use | 168 kgal |
| Gross floor area | 27,106 sq ft |
| Source record | nyc:30731787:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 97.5 kBtu/ft² | 222 tCO₂e | |
| 2023 | — | 82.1 kBtu/ft² | 188 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
- 523 West 24 Street
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.74885, -74.00483
Within ~1 km
Nearby benchmarked buildings
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- Manhattan Westscore —
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- 20-30 Hudson Yardsscore —
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- Penn Southscore 95
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- 50 Hudson Yardsscore 76
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- The Spiral - 66 Hudson Boulevardscore 82
Office · 2,830,000 sq ft
See also: most efficient in New York City · biggest emitters
How does 523 West 24 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. Its site EUI of 97.5 kBtu/ft² is about 51% 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 8.2 kgCO₂e/ft² is about 41% above the group average of 5.8 kgCO₂e/ft².
At 27,106 sq ft, it is about 87% below the average floor area of 205,440 sq ft for those buildings. It was built in 1930, 10 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 523 West 24 Street's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 523 West 24 Street, covering report years 2023–2024. Site EUI moved from 82.1 kBtu/ft² (2023) to 97.5 kBtu/ft² (2024), an 19% increase. Reported emissions went from 188 tCO₂e to 222 tCO₂e over the same span (up 18%).
What does a site EUI of 97.5 kBtu/ft² mean?
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. 523 West 24 Street's 97.5 kBtu/ft² across 27,106 sq ft works out to about 2.6 billion Btu (775 MWh-equivalent) in 2024. Its source EUI of 187.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 384,942 kWh of electricity, 13,306 therms of natural gas and 168 thousand gallons of water for the year.
Which law requires 523 West 24 Street to report its energy use?
523 West 24 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:30731787:2024). 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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- 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 523 West 24 Street's energy grade?
523 West 24 Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 97.5 kBtu/ft².
How much energy does 523 West 24 Street use?
Its 2024 site energy-use intensity was 97.5 kBtu/ft² (187.2 kBtu/ft² source) across 27,106 sq ft, including 384,942 kWh of electricity and 13,306 therms of natural gas.
What are 523 West 24 Street's carbon emissions?
523 West 24 Street reported 222 tCO₂e of greenhouse-gas emissions (8.2 kgCO₂e/ft²) for 2024.
Where is 523 West 24 Street?
523 West 24 Street is in New York City, New York 10011. Its coordinates are 40.74885, -74.00483 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 523 West 24 Street and when was it built?
523 West 24 Street has 27,106 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1930 as its year built. It is classed as office.
Is 523 West 24 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, “523 West 24 Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/523-west-24-street-219c9426 (data as of October 2, 2026).