350 West 23rd Street
Multifamily Housing in New York City, NY · 10011
At a glance
350 West 23rd Street is a 32,958-square-foot multifamily housing building in New York City, New York, built in 1910. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 28.8 kBtu/ft² and 96 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 28.8 kBtu/ft² |
| Source EUI | 69.7 kBtu/ft² |
| GHG emissions | 96 tCO₂e |
| GHG intensity | 2.9 kgCO₂e/ft² |
| Electricity | 217,802 kWh |
| Natural gas | 2,052 therms |
| Water use | 540 kgal |
| Gross floor area | 32,958 sq ft |
| Source record | nyc:6294587:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 28.8 kBtu/ft² | 96 tCO₂e | |
| 2023 | — | 49.5 kBtu/ft² | 124 tCO₂e | |
| 2022 | — | 50.4 kBtu/ft² | 110 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
- 350 West 23rd Street
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.74589, -73.99993
Within ~1 km
Nearby benchmarked buildings
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- PENN 1 (LL97)score —
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- PENN 1 (Offices)score —
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- 111 Eighth Avenuescore —
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See also: most efficient in New York City · biggest emitters
How does 350 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 28.8 kBtu/ft² is about 62% 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 2.9 kgCO₂e/ft² is about 44% below the group average of 5.2 kgCO₂e/ft².
At 32,958 sq ft, it is about 67% below the average floor area of 100,951 sq ft for those buildings. It was built in 1910, 42 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 350 West 23rd Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 350 West 23rd Street, covering report years 2022–2024. Site EUI moved from 50.4 kBtu/ft² (2022) to 28.8 kBtu/ft² (2024), a 43% decrease. Reported emissions went from 110 tCO₂e to 96 tCO₂e over the same span (down 12%).
What does a site EUI of 28.8 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. 350 West 23rd Street's 28.8 kBtu/ft² across 32,958 sq ft works out to about 0.9 billion Btu (278 MWh-equivalent) in 2024. Its source EUI of 69.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 217,802 kWh of electricity, 2,052 therms of natural gas and 540 thousand gallons of water for the year.
Which law requires 350 West 23rd Street to report its energy use?
350 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:6294587:2024). 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
- Gilman: 3044 ALBANY CRESCENT· 32,956 sq ft · score 26 (D)
- NOW UNITED: 136 WEST 168 STREET· 32,956 sq ft · score 89 (A)
- 301 Columbus Ave· 32,956 sq ft · score 24 (D)
- 575 6th Avenue· 32,950 sq ft · EUI 59.3 kBtu/ft²
- 1350 EAST 18TH LLC· 32,950 sq ft · score 10 (D)
- Lux Condominium (433 E. 74th Street)· 32,948 sq ft · EUI 46.9 kBtu/ft²
- 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 350 West 23rd Street's energy grade?
350 West 23rd Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 28.8 kBtu/ft².
How much energy does 350 West 23rd Street use?
Its 2024 site energy-use intensity was 28.8 kBtu/ft² (69.7 kBtu/ft² source) across 32,958 sq ft, including 217,802 kWh of electricity and 2,052 therms of natural gas.
What are 350 West 23rd Street's carbon emissions?
350 West 23rd Street reported 96 tCO₂e of greenhouse-gas emissions (2.9 kgCO₂e/ft²) for 2024.
Where is 350 West 23rd Street?
350 West 23rd Street is in New York City, New York 10011. Its coordinates are 40.74589, -73.99993 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 350 West 23rd Street and when was it built?
350 West 23rd Street has 32,958 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1910 as its year built. It is classed as multifamily housing.
Is 350 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, “350 West 23rd Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/350-west-23rd-street-8acf336d (data as of October 2, 2026).