521 West 122nd Street
Multifamily Housing in New York City, NY · 10027
At a glance
521 West 122nd Street is a 25,017-square-foot multifamily housing building in New York City, New York, built in 1907. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 16.2 kBtu/ft² and 42 tCO₂e of greenhouse-gas emissions. That score is higher than 90% 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 | 100 (band A) |
| Site EUI | 16.2 kBtu/ft² |
| Source EUI | 39.9 kBtu/ft² |
| GHG emissions | 42 tCO₂e |
| GHG intensity | 1.7 kgCO₂e/ft² |
| Electricity | 95,765 kWh |
| Natural gas | 788 therms |
| Water use | 931 kgal |
| Gross floor area | 25,017 sq ft |
| Source record | nyc:6710328:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 16.2 kBtu/ft² | 42 tCO₂e |
| 2023 | 100 | ±0 | 15.6 kBtu/ft² | 37 tCO₂e |
| 2022 | 100 | 18.0 kBtu/ft² | 34 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 122nd Street
- City
- New York City
- State
- New York
- ZIP
- 10027
- Coordinates
- 40.81115, -73.95948
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 521 West 122nd 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. 521 West 122nd Street's ENERGY STAR score of 100 compares with an average of 63 across the 22,829 that report a score; it scores higher than 90% of them. Its site EUI of 16.2 kBtu/ft² is about 78% 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 1.7 kgCO₂e/ft² is about 68% below the group average of 5.2 kgCO₂e/ft².
At 25,017 sq ft, it is about 75% below the average floor area of 100,951 sq ft for those buildings. It was built in 1907, 45 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 521 West 122nd Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 521 West 122nd Street, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2024. Site EUI moved from 18.0 kBtu/ft² (2022) to 16.2 kBtu/ft² (2024), a 10% decrease. Reported emissions went from 34 tCO₂e to 42 tCO₂e over the same span (up 23%).
What does an ENERGY STAR score of 100 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: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 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. 521 West 122nd Street's 16.2 kBtu/ft² across 25,017 sq ft works out to about 0.4 billion Btu (119 MWh-equivalent) in 2024. Its source EUI of 39.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 95,765 kWh of electricity, 788 therms of natural gas and 931 thousand gallons of water for the year.
Which law requires 521 West 122nd Street to report its energy use?
521 West 122nd 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:6710328:2024). 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
- MQ Property Management:38 NORTH MOORE STREET· 25,015 sq ft · score 93 (A)
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- xxTERM’6.30.25 –Wavecrest - 177 East 79th Street· 25,010 sq ft · EUI 75.1 kBtu/ft²
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- Lovett - CAMPUS - 113 - 115 Union Street - 222 COLUMBIA ST/115 Union Street· 25,009 sq ft · score 6 (D)
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- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
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- Least efficient large buildings in New York City
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Frequently asked questions
What is 521 West 122nd Street's energy grade?
521 West 122nd Street scores 100 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 521 West 122nd Street use?
Its 2024 site energy-use intensity was 16.2 kBtu/ft² (39.9 kBtu/ft² source) across 25,017 sq ft, including 95,765 kWh of electricity and 788 therms of natural gas.
What are 521 West 122nd Street's carbon emissions?
521 West 122nd Street reported 42 tCO₂e of greenhouse-gas emissions (1.7 kgCO₂e/ft²) for 2024.
Where is 521 West 122nd Street?
521 West 122nd Street is in New York City, New York 10027. Its coordinates are 40.81115, -73.95948 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 521 West 122nd Street and when was it built?
521 West 122nd Street has 25,017 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1907 as its year built. It is classed as multifamily housing.
Is 521 West 122nd 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 122nd Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/521-west-122nd-street-04402a10 (data as of October 2, 2026).