341 West 45th Street
Multifamily Housing in New York City, NY · 10036
At a glance
341 West 45th Street is a 42,000-square-foot multifamily housing building in New York City, New York, built in 1939. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 83 out of 100 (grade B), a site energy-use intensity of 81.6 kBtu/ft² and 299 tCO₂e of greenhouse-gas emissions. That score is higher than 67% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 83 (band B) |
| Site EUI | 81.6 kBtu/ft² |
| Source EUI | 129.0 kBtu/ft² |
| GHG emissions | 299 tCO₂e |
| GHG intensity | 7.1 kgCO₂e/ft² |
| Electricity | 320,483 kWh |
| Natural gas | 0 therms |
| Water use | 2,595 kgal |
| Gross floor area | 42,000 sq ft |
| Source record | nyc:6271343:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 83 | +7 | 81.6 kBtu/ft² | 299 tCO₂e |
| 2023 | 76 | -17 | 91.9 kBtu/ft² | 322 tCO₂e |
| 2022 | 93 | 77.8 kBtu/ft² | 252 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
- 341 West 45th Street
- City
- New York City
- State
- New York
- ZIP
- 10036
- Coordinates
- 40.75969, -73.98962
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 341 West 45th 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. 341 West 45th Street's ENERGY STAR score of 83 compares with an average of 63 across the 22,829 that report a score; it scores higher than 67% of them and lower than 32%. Its site EUI of 81.6 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 7.1 kgCO₂e/ft² is about 37% above the group average of 5.2 kgCO₂e/ft².
At 42,000 sq ft, it is about 58% below the average floor area of 100,951 sq ft for those buildings. It was built in 1939, 13 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 341 West 45th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 341 West 45th Street, covering report years 2022–2024. Its ENERGY STAR score went from 93 in 2022 to 83 in 2024 (-10 points); its best year on file was 2022, at 93. Site EUI moved from 77.8 kBtu/ft² (2022) to 81.6 kBtu/ft² (2024), an 5% increase. Reported emissions went from 252 tCO₂e to 299 tCO₂e over the same span (up 19%).
What does an ENERGY STAR score of 83 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: a score of 83 means the building performs better than about 83% of its national peers. BuildingCensus bands the score into report-card grades; 83 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In New York City, 43% of scored buildings are at 75 or above.
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. 341 West 45th Street's 81.6 kBtu/ft² across 42,000 sq ft works out to about 3.4 billion Btu (1,004 MWh-equivalent) in 2024. Its source EUI of 129.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 320,483 kWh of electricity, 0 therms of natural gas and 2,595 thousand gallons of water for the year.
Which law requires 341 West 45th Street to report its energy use?
341 West 45th 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:6271343:2024). 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.
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Frequently asked questions
What is 341 West 45th Street's energy grade?
341 West 45th Street scores 83 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 341 West 45th Street use?
Its 2024 site energy-use intensity was 81.6 kBtu/ft² (129.0 kBtu/ft² source) across 42,000 sq ft, including 320,483 kWh of electricity and 0 therms of natural gas.
What are 341 West 45th Street's carbon emissions?
341 West 45th Street reported 299 tCO₂e of greenhouse-gas emissions (7.1 kgCO₂e/ft²) for 2024.
Where is 341 West 45th Street?
341 West 45th Street is in New York City, New York 10036. Its coordinates are 40.75969, -73.98962 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 341 West 45th Street and when was it built?
341 West 45th Street has 42,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1939 as its year built. It is classed as multifamily housing.
Is 341 West 45th 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, “341 West 45th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/341-west-45th-street-fb1b74dd (data as of October 2, 2026).