42-52 West 39 Street LLC / 42 West 39th St
Office in New York City, NY · 42 West 39th Street · 10018
At a glance
42-52 West 39 Street LLC / 42 West 39th St is a 157,748-square-foot office building at 42 West 39th Street in New York City, New York, built in 1927. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 56.8 kBtu/ft² and 810 tCO₂e of greenhouse-gas emissions. That score is higher than 54% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 81 (band B) |
| Site EUI | 56.8 kBtu/ft² |
| Source EUI | 119.5 kBtu/ft² |
| GHG emissions | 810 tCO₂e |
| GHG intensity | 5.1 kgCO₂e/ft² |
| Electricity | 1,580,400 kWh |
| Natural gas | 35,743 therms |
| Water use | 1,676 kgal |
| Gross floor area | 157,748 sq ft |
| Source record | nyc:2544622:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 81 | +1 | 56.8 kBtu/ft² | 810 tCO₂e |
| 2023 | 80 | +4 | 55.9 kBtu/ft² | 787 tCO₂e |
| 2022 | 76 | 64.4 kBtu/ft² | 731 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
- 42 West 39th Street
- City
- New York City
- State
- New York
- ZIP
- 10018
- Coordinates
- 40.75217, -73.98370
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 42-52 West 39 Street LLC / 42 West 39th St compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. 42-52 West 39 Street LLC / 42 West 39th St's ENERGY STAR score of 81 compares with an average of 72 across the 2,519 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 56.8 kBtu/ft² is about 12% below the average of 64.5 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 about 11% below the group average of 5.8 kgCO₂e/ft².
At 157,748 sq ft, it is about 23% below the average floor area of 205,440 sq ft for those buildings. It was built in 1927, 13 years earlier than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 42-52 West 39 Street LLC / 42 West 39th St's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 42-52 West 39 Street LLC / 42 West 39th St, covering report years 2022–2024. Its ENERGY STAR score went from 76 in 2022 to 81 in 2024 (+5 points). Site EUI moved from 64.4 kBtu/ft² (2022) to 56.8 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 731 tCO₂e to 810 tCO₂e over the same span (up 11%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 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. 42-52 West 39 Street LLC / 42 West 39th St's 56.8 kBtu/ft² across 157,748 sq ft works out to about 9 billion Btu (2,626 MWh-equivalent) in 2024. Its source EUI of 119.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,580,400 kWh of electricity, 35,743 therms of natural gas and 1,676 thousand gallons of water for the year.
Which law requires 42-52 West 39 Street LLC / 42 West 39th St to report its energy use?
42-52 West 39 Street LLC / 42 West 39th 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:2544622:2024). 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 office buildings in New York City
- 18 West 18th Street· 157,711 sq ft · score 95 (A)
- 9 Bond Street· 157,600 sq ft · EUI 106.0 kBtu/ft²
- 41-45 West 25th St (LL84)-Campus· 157,152 sq ft · EUI 37.9 kBtu/ft²
- 229 West 28th Street· 157,061 sq ft · score 90 (A)
- 501 5th Avenue· 156,993 sq ft · score 77 (B)
- 401 Fifth Avenue· 156,760 sq ft · score 60 (C)
- Office buildings in New York City· 3,384 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 42-52 West 39 Street LLC / 42 West 39th St's energy grade?
42-52 West 39 Street LLC / 42 West 39th St scores 81 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 42-52 West 39 Street LLC / 42 West 39th St use?
Its 2024 site energy-use intensity was 56.8 kBtu/ft² (119.5 kBtu/ft² source) across 157,748 sq ft, including 1,580,400 kWh of electricity and 35,743 therms of natural gas.
What are 42-52 West 39 Street LLC / 42 West 39th St's carbon emissions?
42-52 West 39 Street LLC / 42 West 39th St reported 810 tCO₂e of greenhouse-gas emissions (5.1 kgCO₂e/ft²) for 2024.
Where is 42-52 West 39 Street LLC / 42 West 39th St?
42-52 West 39 Street LLC / 42 West 39th St is at 42 West 39th Street, in New York City, New York 10018. Its coordinates are 40.75217, -73.98370 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 42-52 West 39 Street LLC / 42 West 39th St and when was it built?
42-52 West 39 Street LLC / 42 West 39th St has 157,748 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1927 as its year built. It is classed as office.
Is 42-52 West 39 Street LLC / 42 West 39th 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).
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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, “42-52 West 39 Street LLC / 42 West 39th St, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/42-52-west-39-street-llc-42-west-39th-st-360f69d2 (data as of October 2, 2026).