521-541 West 25th Street
Office in New York City, NY · 10001
At a glance
521-541 West 25th Street is a 89,849-square-foot office building in New York City, New York, built in 1910. In its 2023 New York City benchmarking disclosure it reported a site energy-use intensity of 39.2 kBtu/ft² and 322 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 39.2 kBtu/ft² |
| Source EUI | 73.4 kBtu/ft² |
| GHG emissions | 322 tCO₂e |
| GHG intensity | 3.6 kgCO₂e/ft² |
| Electricity | 497,650 kWh |
| Natural gas | 26 therms |
| Gross floor area | 89,849 sq ft |
| Source record | nyc:4371819:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | 39.2 kBtu/ft² | 322 tCO₂e | |
| 2022 | — | 51.5 kBtu/ft² | 366 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
- 521-541 West 25th Street
- City
- New York City
- State
- New York
- ZIP
- 10001
- Coordinates
- 40.74944, -74.00431
Within ~1 km
Nearby benchmarked buildings
- Hudson Yards Cogen Campusscore —
Other · 7,739,076 sq ft
- Manhattan Westscore —
Other · 4,153,954 sq ft
- 20-30 Hudson Yardsscore —
Office · 3,810,623 sq ft
- Penn Southscore 95
Multifamily Housing · 3,391,963 sq ft
- 50 Hudson Yardsscore 76
Office · 2,944,455 sq ft
- The Spiral - 66 Hudson Boulevardscore 82
Office · 2,830,000 sq ft
See also: most efficient in New York City · biggest emitters
How does 521-541 West 25th 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 39.2 kBtu/ft² is about 39% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 3.6 kgCO₂e/ft² is about 38% below the group average of 5.8 kgCO₂e/ft².
At 89,849 sq ft, it is about 56% below the average floor area of 205,440 sq ft for those buildings. It was built in 1910, 30 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 521-541 West 25th Street's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 521-541 West 25th Street, covering report years 2022–2023. Site EUI moved from 51.5 kBtu/ft² (2022) to 39.2 kBtu/ft² (2023), a 24% decrease. Reported emissions went from 366 tCO₂e to 322 tCO₂e over the same span (down 12%).
What does a site EUI of 39.2 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. 521-541 West 25th Street's 39.2 kBtu/ft² across 89,849 sq ft works out to about 3.5 billion Btu (1,032 MWh-equivalent) in 2023. Its source EUI of 73.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 497,650 kWh of electricity and 26 therms of natural gas for the year.
Which law requires 521-541 West 25th Street to report its energy use?
521-541 West 25th 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 2023 disclosure (source record nyc:4371819:2023). 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
- BRC - Reception Center· 89,762 sq ft · score 13 (D)
- 45 West 34th Street· 89,582 sq ft · score 61 (C)
- 71 WEST STREET· 89,570 sq ft · EUI 26.7 kBtu/ft²
- 260 West 36th Street· 89,513 sq ft · score 87 (A)
- D Building· 89,506 sq ft · score 81 (B)
- 511 West 25th Street· 89,436 sq ft · EUI 38.7 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 521-541 West 25th Street's energy grade?
521-541 West 25th Street did not report an ENERGY STAR score in its 2023 disclosure, but its site energy-use intensity was 39.2 kBtu/ft².
How much energy does 521-541 West 25th Street use?
Its 2023 site energy-use intensity was 39.2 kBtu/ft² (73.4 kBtu/ft² source) across 89,849 sq ft, including 497,650 kWh of electricity and 26 therms of natural gas.
What are 521-541 West 25th Street's carbon emissions?
521-541 West 25th Street reported 322 tCO₂e of greenhouse-gas emissions (3.6 kgCO₂e/ft²) for 2023.
Where is 521-541 West 25th Street?
521-541 West 25th Street is in New York City, New York 10001. Its coordinates are 40.74944, -74.00431 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 521-541 West 25th Street and when was it built?
521-541 West 25th Street has 89,849 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1910 as its year built. It is classed as office.
Is 521-541 West 25th Street 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, “521-541 West 25th Street, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/521-541-west-25th-street-906a27a5 (data as of October 2, 2026).