645 W 239th St
Multifamily Housing in New York City, NY · 645 West 239th Street · 10463
At a glance
645 W 239th St is a 65,766-square-foot multifamily housing building at 645 West 239th Street in New York City, New York, built in 1953. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 94 out of 100 (grade A), a site energy-use intensity of 53.5 kBtu/ft² and 221 tCO₂e of greenhouse-gas emissions. That score is higher than 82% 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 | 94 (band A) |
| Site EUI | 53.5 kBtu/ft² |
| Source EUI | 70.7 kBtu/ft² |
| GHG emissions | 221 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 160,708 kWh |
| Natural gas | 29,675 therms |
| Water use | 2,172 kgal |
| Gross floor area | 65,766 sq ft |
| Source record | nyc:2683849:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 94 | ±0 | 53.5 kBtu/ft² | 221 tCO₂e |
| 2023 | 94 | +9 | 52.8 kBtu/ft² | 213 tCO₂e |
| 2022 | 85 | 66.7 kBtu/ft² | 251 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 645 West 239th Street
- City
- New York City
- State
- New York
- ZIP
- 10463
- Coordinates
- 40.88973, -73.91264
Within ~1 km
Nearby benchmarked buildings
- 3333 Henry Hudson Parkwayscore 74
Multifamily Housing · 711,270 sq ft
Multifamily Housing · 418,871 sq ft
- Glenwood - Briar Hill - PARENTscore 39
Multifamily Housing · 360,683 sq ft
- 3411 Irwin Avenuescore 62
Multifamily Housing · 345,000 sq ft
K-12 School · 325,356 sq ft
- 3530 Henry Hudson Parkwayscore 83
Multifamily Housing · 312,000 sq ft
See also: most efficient in New York City · biggest emitters
How does 645 W 239th St 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. 645 W 239th St's ENERGY STAR score of 94 compares with an average of 63 across the 22,829 that report a score; it scores higher than 82% of them and lower than 17%. Its site EUI of 53.5 kBtu/ft² is about 29% 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 3.4 kgCO₂e/ft² is about 35% below the group average of 5.2 kgCO₂e/ft².
At 65,766 sq ft, it is about 35% below the average floor area of 100,951 sq ft for those buildings. Its 1953 construction date is close to 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 645 W 239th St's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 645 W 239th St, covering report years 2022–2024. Its ENERGY STAR score went from 85 in 2022 to 94 in 2024 (+9 points); its best year on file was 2023, at 94. Site EUI moved from 66.7 kBtu/ft² (2022) to 53.5 kBtu/ft² (2024), a 20% decrease. Reported emissions went from 251 tCO₂e to 221 tCO₂e over the same span (down 12%).
What does an ENERGY STAR score of 94 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 94 means the building performs better than about 94% of its national peers. BuildingCensus bands the score into report-card grades; 94 falls in band A — high performer (85–100). 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. 645 W 239th St's 53.5 kBtu/ft² across 65,766 sq ft works out to about 3.5 billion Btu (1,031 MWh-equivalent) in 2024. Its source EUI of 70.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 160,708 kWh of electricity, 29,675 therms of natural gas and 2,172 thousand gallons of water for the year.
Which law requires 645 W 239th St to report its energy use?
645 W 239th St 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:2683849:2024). 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
- 1660 Andrews Avenue· 65,765 sq ft · score 29 (D)
- 41-15 44th Street Owners Corp.· 65,748 sq ft · score 78 (B)
- 101 West 140th Street AKA 607 Lenox Avenue· 65,736 sq ft · score 5 (D)
- Renaissance - Future Purchase - 585 Lenox Ave/101 West 140 St.· 65,736 sq ft · score 38 (D)
- 69-05 35th Avenue - 43346· 65,732 sq ft · score 76 (B)
- 135 William Street· 65,732 sq ft · EUI 42.5 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 645 W 239th St's energy grade?
645 W 239th St scores 94 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 645 W 239th St use?
Its 2024 site energy-use intensity was 53.5 kBtu/ft² (70.7 kBtu/ft² source) across 65,766 sq ft, including 160,708 kWh of electricity and 29,675 therms of natural gas.
What are 645 W 239th St's carbon emissions?
645 W 239th St reported 221 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2024.
Where is 645 W 239th St?
645 W 239th St is at 645 West 239th Street, in New York City, New York 10463. Its coordinates are 40.88973, -73.91264 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 645 W 239th St and when was it built?
645 W 239th St has 65,766 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1953 as its year built. It is classed as multifamily housing.
Is 645 W 239th St 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).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “645 W 239th St, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/645-w-239th-st-0a87d82d (data as of October 2, 2026).