115 West 23rd Street
Multifamily Housing in New York City, NY · 10011
At a glance
115 West 23rd Street is a 27,132-square-foot multifamily housing building in New York City, New York, built in 1920. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 77.9 kBtu/ft² and 211 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 77.9 kBtu/ft² |
| Source EUI | 184.8 kBtu/ft² |
| GHG emissions | 211 tCO₂e |
| GHG intensity | 7.8 kgCO₂e/ft² |
| Electricity | 468,033 kWh |
| Natural gas | 5,165 therms |
| Water use | 1,890 kgal |
| Gross floor area | 27,132 sq ft |
| Source record | nyc:6699671:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 77.9 kBtu/ft² | 211 tCO₂e | |
| 2023 | — | 74.7 kBtu/ft² | 198 tCO₂e | |
| 2022 | — | 75.8 kBtu/ft² | 161 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
- 115 West 23rd Street
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.74321, -73.99351
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 115 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 77.9 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 7.8 kgCO₂e/ft² is about 50% above the group average of 5.2 kgCO₂e/ft².
At 27,132 sq ft, it is about 73% below the average floor area of 100,951 sq ft for those buildings. It was built in 1920, 32 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 115 West 23rd Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 115 West 23rd Street, covering report years 2022–2024. Site EUI moved from 75.8 kBtu/ft² (2022) to 77.9 kBtu/ft² (2024), an 3% increase. Reported emissions went from 161 tCO₂e to 211 tCO₂e over the same span (up 31%).
What does a site EUI of 77.9 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. 115 West 23rd Street's 77.9 kBtu/ft² across 27,132 sq ft works out to about 2.1 billion Btu (619 MWh-equivalent) in 2024. Its source EUI of 184.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 468,033 kWh of electricity, 5,165 therms of natural gas and 1,890 thousand gallons of water for the year.
Which law requires 115 West 23rd Street to report its energy use?
115 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:6699671:2024). 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
- 731 Southern Blvd I Housing· 27,130 sq ft · score 79 (B)
- 981 Park Place· 27,127 sq ft · score 48 (D)
- 392 ST MARK'S AVENUE· 27,125 sq ft · score 85 (A)
- 619W 163rd ST· 27,120 sq ft · score 16 (D)
- 611 West 163 Street· 27,120 sq ft · score 57 (C)
- ZIZI REALTY LLC 610· 27,120 sq ft · score 100 (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 115 West 23rd Street's energy grade?
115 West 23rd Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 77.9 kBtu/ft².
How much energy does 115 West 23rd Street use?
Its 2024 site energy-use intensity was 77.9 kBtu/ft² (184.8 kBtu/ft² source) across 27,132 sq ft, including 468,033 kWh of electricity and 5,165 therms of natural gas.
What are 115 West 23rd Street's carbon emissions?
115 West 23rd Street reported 211 tCO₂e of greenhouse-gas emissions (7.8 kgCO₂e/ft²) for 2024.
Where is 115 West 23rd Street?
115 West 23rd Street is in New York City, New York 10011. Its coordinates are 40.74321, -73.99351 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 115 West 23rd Street and when was it built?
115 West 23rd Street has 27,132 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1920 as its year built. It is classed as multifamily housing.
Is 115 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, “115 West 23rd Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/115-west-23rd-street-4e30ec98 (data as of October 2, 2026).