501 West 121 St
Multifamily Housing in New York City, NY · 10027
At a glance
501 West 121 St is a 46,512-square-foot multifamily housing building in New York City, New York, built in 1926. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 18.2 kBtu/ft² and 92 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 18.2 kBtu/ft² |
| Source EUI | 47.5 kBtu/ft² |
| GHG emissions | 92 tCO₂e |
| GHG intensity | 2.0 kgCO₂e/ft² |
| Electricity | 220,962 kWh |
| Natural gas | 940 therms |
| Water use | 1,454 kgal |
| Gross floor area | 46,512 sq ft |
| Source record | nyc:8169126:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 18.2 kBtu/ft² | 92 tCO₂e | |
| 2023 | — | 17.3 kBtu/ft² | 88 tCO₂e | |
| 2022 | — | 64.4 kBtu/ft² | 185 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
- 501 West 121 St
- City
- New York City
- State
- New York
- ZIP
- 10027
- Coordinates
- 40.81009, -73.95889
Within ~1 km
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How does 501 West 121 St 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. Its site EUI of 18.2 kBtu/ft² is about 76% 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 2.0 kgCO₂e/ft² is about 62% below the group average of 5.2 kgCO₂e/ft².
At 46,512 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1926, 26 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 501 West 121 St's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 501 West 121 St, covering report years 2022–2024. Site EUI moved from 64.4 kBtu/ft² (2022) to 18.2 kBtu/ft² (2024), a 72% decrease. Reported emissions went from 185 tCO₂e to 92 tCO₂e over the same span (down 50%).
What does a site EUI of 18.2 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. 501 West 121 St's 18.2 kBtu/ft² across 46,512 sq ft works out to about 0.8 billion Btu (248 MWh-equivalent) in 2024. Its source EUI of 47.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 220,962 kWh of electricity, 940 therms of natural gas and 1,454 thousand gallons of water for the year.
Which law requires 501 West 121 St to report its energy use?
501 West 121 St 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:8169126:2024). 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
- 2465 Tratman Realty· 46,503 sq ft · score 24 (D)
- Hammel Bldg 7· 46,500 sq ft · EUI 26.1 kBtu/ft²
- 624 West 176th Street· 46,500 sq ft · score 86 (A)
- Hammel Bldg 13· 46,500 sq ft · EUI 23.5 kBtu/ft²
- 408 West 34th Street· 46,500 sq ft
- ECHUD REALTY LLC / 1750· 46,500 sq ft · score 30 (D)
- 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 501 West 121 St's energy grade?
501 West 121 St did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 18.2 kBtu/ft².
How much energy does 501 West 121 St use?
Its 2024 site energy-use intensity was 18.2 kBtu/ft² (47.5 kBtu/ft² source) across 46,512 sq ft, including 220,962 kWh of electricity and 940 therms of natural gas.
What are 501 West 121 St's carbon emissions?
501 West 121 St reported 92 tCO₂e of greenhouse-gas emissions (2.0 kgCO₂e/ft²) for 2024.
Where is 501 West 121 St?
501 West 121 St is in New York City, New York 10027. Its coordinates are 40.81009, -73.95889 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 501 West 121 St and when was it built?
501 West 121 St has 46,512 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1926 as its year built. It is classed as multifamily housing.
Is 501 West 121 St 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, “501 West 121 St, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/501-west-121-st-dab205e5 (data as of October 2, 2026).