31 West 21st Street - 36542
Multifamily Housing in New York City, NY · 31 West 21st Street · 10010
At a glance
31 West 21st Street - 36542 is a 74,316-square-foot multifamily housing building in New York City, New York, built in 2003. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 39.2 kBtu/ft² and 242 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 39.2 kBtu/ft² |
| Source EUI | 74.4 kBtu/ft² |
| GHG emissions | 242 tCO₂e |
| GHG intensity | 3.3 kgCO₂e/ft² |
| Electricity | 413,780 kWh |
| Natural gas | 15,002 therms |
| Water use | 1,433 kgal |
| Gross floor area | 74,316 sq ft |
| Source record | nyc:2636465:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 39.2 kBtu/ft² | 242 tCO₂e | |
| 2023 | — | 40.9 kBtu/ft² | 238 tCO₂e | |
| 2022 | — | 44.8 kBtu/ft² | 224 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
- 31 West 21st Street
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.74076, -73.99168
Within ~1 km
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- One Madison Avenuescore —
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See also: most efficient in New York City · biggest emitters
How does 31 West 21st Street - 36542 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 39.2 kBtu/ft² is about half of 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 3.3 kgCO₂e/ft² is about 37% below the group average of 5.2 kgCO₂e/ft².
At 74,316 sq ft, it is about 26% below the average floor area of 100,951 sq ft for those buildings. It was built in 2003, 51 years later 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 31 West 21st Street - 36542's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 31 West 21st Street - 36542, covering report years 2022–2024. Site EUI moved from 44.8 kBtu/ft² (2022) to 39.2 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 224 tCO₂e to 242 tCO₂e over the same span (up 8%).
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. 31 West 21st Street - 36542's 39.2 kBtu/ft² across 74,316 sq ft works out to about 2.9 billion Btu (854 MWh-equivalent) in 2024. Its source EUI of 74.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 413,780 kWh of electricity, 15,002 therms of natural gas and 1,433 thousand gallons of water for the year.
Which law requires 31 West 21st Street - 36542 to report its energy use?
31 West 21st Street - 36542 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:2636465:2024). 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
- 2640 Frederick Douglass Boulevard· 74,304 sq ft · score 47 (D)
- 125 East 12th Street· 74,303 sq ft · score 23 (D)
- 2707 Creston Avenue· 74,293 sq ft · score 27 (D)
- 269 Central Avenue AKA 250 Wilson Avenue (Parent Property)· 74,280 sq ft · score 91 (A)
- 1122 CHESTNUT AVENUE, BK· 74,271 sq ft · score 70 (B)
- Kewa, Inc.· 74,270 sq ft · score 98 (A)
- 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 31 West 21st Street - 36542's energy grade?
31 West 21st Street - 36542 did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 39.2 kBtu/ft².
How much energy does 31 West 21st Street - 36542 use?
Its 2024 site energy-use intensity was 39.2 kBtu/ft² (74.4 kBtu/ft² source) across 74,316 sq ft, including 413,780 kWh of electricity and 15,002 therms of natural gas.
What are 31 West 21st Street - 36542's carbon emissions?
31 West 21st Street - 36542 reported 242 tCO₂e of greenhouse-gas emissions (3.3 kgCO₂e/ft²) for 2024.
Where is 31 West 21st Street - 36542?
31 West 21st Street - 36542 is in New York City, New York 10010. Its coordinates are 40.74076, -73.99168 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 31 West 21st Street - 36542 and when was it built?
31 West 21st Street - 36542 has 74,316 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2003 as its year built. It is classed as multifamily housing.
Is 31 West 21st Street - 36542 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, “31 West 21st Street - 36542, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/31-west-21st-street-36542-43dfa84d (data as of October 2, 2026).