312 West 23rd Street
Multifamily Housing in New York City, NY · 312 W. 23Rd Street · 10011
At a glance
312 West 23rd Street is a 48,886-square-foot multifamily housing building at 312 W. 23Rd Street in New York City, New York, built in 1948. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 95.1 kBtu/ft² and 329 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 95.1 kBtu/ft² |
| Source EUI | 147.5 kBtu/ft² |
| GHG emissions | 329 tCO₂e |
| GHG intensity | 6.7 kgCO₂e/ft² |
| Electricity | 389,718 kWh |
| Natural gas | 33,193 therms |
| Water use | 3,091 kgal |
| Gross floor area | 48,886 sq ft |
| Source record | nyc:52721894:2024 |
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
- 312 W. 23Rd Street
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.74557, -73.99916
Within ~1 km
Nearby benchmarked buildings
- Manhattan Westscore —
Other · 4,153,954 sq ft
- Penn Southscore 95
Multifamily Housing · 3,391,963 sq ft
- PENN 1 (LL97)score —
Office · 2,488,353 sq ft
- PENN 1 (Offices)score —
Office · 2,439,745 sq ft
- 111 Eighth Avenuescore —
Office · 2,375,706 sq ft
Office · 2,091,862 sq ft
See also: most efficient in New York City · biggest emitters
How does 312 West 23rd 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. Its site EUI of 95.1 kBtu/ft² is about 27% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 6.7 kgCO₂e/ft² is about 30% above the group average of 5.2 kgCO₂e/ft².
At 48,886 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1948, 4 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.
What does a site EUI of 95.1 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. 312 West 23rd Street's 95.1 kBtu/ft² across 48,886 sq ft works out to about 4.6 billion Btu (1,363 MWh-equivalent) in 2024. Its source EUI of 147.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 389,718 kWh of electricity, 33,193 therms of natural gas and 3,091 thousand gallons of water for the year.
Which law requires 312 West 23rd Street to report its energy use?
312 West 23rd 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:52721894:2024). 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
- Halstead - 1036 Park Avenue - 1032 P - CHILD· 48,878 sq ft · score 1 (D)
- Halstead - 1036 Park Avenue - 86 E 86 - CHILD· 48,877 sq ft
- 239 East Mosholu Parkway North· 48,875 sq ft · score 60 (C)
- 163 Eastern Parkway· 48,873 sq ft
- 1245 Findlay Avenue· 48,870 sq ft · score 32 (D)
- 1245 Findlay Avenue· 48,870 sq ft · score 55 (C)
- 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 312 West 23rd Street's energy grade?
312 West 23rd Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 95.1 kBtu/ft².
How much energy does 312 West 23rd Street use?
Its 2024 site energy-use intensity was 95.1 kBtu/ft² (147.5 kBtu/ft² source) across 48,886 sq ft, including 389,718 kWh of electricity and 33,193 therms of natural gas.
What are 312 West 23rd Street's carbon emissions?
312 West 23rd Street reported 329 tCO₂e of greenhouse-gas emissions (6.7 kgCO₂e/ft²) for 2024.
Where is 312 West 23rd Street?
312 West 23rd Street is at 312 W. 23Rd Street, in New York City, New York 10011. Its coordinates are 40.74557, -73.99916 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 312 West 23rd Street and when was it built?
312 West 23rd Street has 48,886 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1948 as its year built. It is classed as multifamily housing.
Is 312 West 23rd 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, “312 West 23rd Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/312-west-23rd-street-1e2d7831 (data as of October 2, 2026).