NB:235 West 71st Street
Multifamily Housing in New York City, NY · 235 West 71st Street · 10023
At a glance
NB:235 West 71st Street is a 47,833-square-foot multifamily housing building in New York City, New York, built in 1912. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 64.6 kBtu/ft² and 243 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 64.6 kBtu/ft² |
| Source EUI | 114.5 kBtu/ft² |
| GHG emissions | 243 tCO₂e |
| GHG intensity | 5.1 kgCO₂e/ft² |
| Electricity | 373,975 kWh |
| Natural gas | 18,146 therms |
| Water use | 1,300 kgal |
| Gross floor area | 47,833 sq ft |
| Source record | nyc:54161295:2024 |
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
- 235 West 71st Street
- City
- New York City
- State
- New York
- ZIP
- 10023
- Coordinates
- 40.77850, -73.98347
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does NB:235 West 71st 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 64.6 kBtu/ft² is about 14% 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 5.1 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².
At 47,833 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1912, 40 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 64.6 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. NB:235 West 71st Street's 64.6 kBtu/ft² across 47,833 sq ft works out to about 3.1 billion Btu (906 MWh-equivalent) in 2024. Its source EUI of 114.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 373,975 kWh of electricity, 18,146 therms of natural gas and 1,300 thousand gallons of water for the year.
Which law requires NB:235 West 71st Street to report its energy use?
NB:235 West 71st 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:54161295:2024). 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
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- 78 THAYER ST.· 47,825 sq ft · score 100 (A)
- Cornell pace - 78-86 Thayer Street· 47,825 sq ft · score 94 (A)
- 78-86 THAYER STREET CORP· 47,825 sq ft · score 94 (A)
- Elliana 1240 Park· 47,822 sq ft · score 58 (C)
- 53 Hamilton Terrace· 47,822 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)
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- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is NB:235 West 71st Street's energy grade?
NB:235 West 71st Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 64.6 kBtu/ft².
How much energy does NB:235 West 71st Street use?
Its 2024 site energy-use intensity was 64.6 kBtu/ft² (114.5 kBtu/ft² source) across 47,833 sq ft, including 373,975 kWh of electricity and 18,146 therms of natural gas.
What are NB:235 West 71st Street's carbon emissions?
NB:235 West 71st Street reported 243 tCO₂e of greenhouse-gas emissions (5.1 kgCO₂e/ft²) for 2024.
Where is NB:235 West 71st Street?
NB:235 West 71st Street is in New York City, New York 10023. Its coordinates are 40.77850, -73.98347 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is NB:235 West 71st Street and when was it built?
NB:235 West 71st Street has 47,833 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1912 as its year built. It is classed as multifamily housing.
Is NB:235 West 71st 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, “NB:235 West 71st Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/nb-235-west-71st-street-bb59d2e1 (data as of October 2, 2026).