521 West 26th Street
Office in New York City, NY · 10001
At a glance
521 West 26th Street is a 135,214-square-foot office building in New York City, New York, built in 1920. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 46.4 kBtu/ft² and 449 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 46.4 kBtu/ft² |
| Source EUI | 72.8 kBtu/ft² |
| GHG emissions | 449 tCO₂e |
| GHG intensity | 3.3 kgCO₂e/ft² |
| Electricity | 546,799 kWh |
| Natural gas | 44,051 therms |
| Water use | 778 kgal |
| Gross floor area | 135,214 sq ft |
| Source record | nyc:3112854:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 46.4 kBtu/ft² | 449 tCO₂e | |
| 2023 | 90 | -1 | 44.9 kBtu/ft² | 451 tCO₂e |
| 2022 | 91 | 47.9 kBtu/ft² | 409 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 West 26th Street
- City
- New York City
- State
- New York
- ZIP
- 10001
- Coordinates
- 40.75006, -74.00388
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 —
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- 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 West 26th 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 46.4 kBtu/ft² is about 28% 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 3.3 kgCO₂e/ft² is about 43% below the group average of 5.8 kgCO₂e/ft².
At 135,214 sq ft, it is about 34% below the average floor area of 205,440 sq ft for those buildings. It was built in 1920, 20 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 West 26th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 521 West 26th Street, covering report years 2022–2024. Its ENERGY STAR score went from 91 in 2022 to 90 in 2023 (-1 points); its best year on file was 2022, at 91. Site EUI moved from 47.9 kBtu/ft² (2022) to 46.4 kBtu/ft² (2024), a 3% decrease. Reported emissions went from 409 tCO₂e to 449 tCO₂e over the same span (up 10%).
What does a site EUI of 46.4 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 West 26th Street's 46.4 kBtu/ft² across 135,214 sq ft works out to about 6.3 billion Btu (1,839 MWh-equivalent) in 2024. Its source EUI of 72.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 546,799 kWh of electricity, 44,051 therms of natural gas and 778 thousand gallons of water for the year.
Which law requires 521 West 26th Street to report its energy use?
521 West 26th 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:3112854:2024). 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
- Greenway Mews Realty LLC· 135,000 sq ft · score 78 (B)
- 390 Fifth Ave LLC· 135,000 sq ft · score 48 (D)
- 535 Eighth Avenue LLC (BBL): 1-00760-0043 (BIN) 1013599· 134,600 sq ft · score 86 (A)
- HRA_4362_Oberia D. Dempsey Multi-Service Center· 134,468 sq ft · score 52 (D)
- West 54th Street, LLC· 134,441 sq ft · score 81 (B)
- 30 East 60th Street (28 E 60 ST)· 134,302 sq ft
- 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 West 26th Street's energy grade?
521 West 26th Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 46.4 kBtu/ft².
How much energy does 521 West 26th Street use?
Its 2024 site energy-use intensity was 46.4 kBtu/ft² (72.8 kBtu/ft² source) across 135,214 sq ft, including 546,799 kWh of electricity and 44,051 therms of natural gas.
What are 521 West 26th Street's carbon emissions?
521 West 26th Street reported 449 tCO₂e of greenhouse-gas emissions (3.3 kgCO₂e/ft²) for 2024.
Where is 521 West 26th Street?
521 West 26th Street is in New York City, New York 10001. Its coordinates are 40.75006, -74.00388 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 521 West 26th Street and when was it built?
521 West 26th Street has 135,214 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1920 as its year built. It is classed as office.
Is 521 West 26th 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, “521 West 26th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/521-west-26th-street-66886b3c (data as of October 2, 2026).