1 W 39th Street - LL84
Office in New York City, NY · 1 West 39th Street · 10018
At a glance
1 W 39th Street - LL84 is a 135,332-square-foot office building at 1 West 39th Street in New York City, New York, built in 1984. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 110.8 kBtu/ft² and 1,615 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 110.8 kBtu/ft² |
| Source EUI | 283.3 kBtu/ft² |
| GHG emissions | 1,615 tCO₂e |
| GHG intensity | 11.9 kgCO₂e/ft² |
| Electricity | 3,724,449 kWh |
| Water use | 2,366 kgal |
| Gross floor area | 135,332 sq ft |
| Source record | nyc:3582816:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 110.8 kBtu/ft² | 1,615 tCO₂e | |
| 2023 | 100 | ±0 | 114.6 kBtu/ft² | 1,595 tCO₂e |
| 2022 | 100 | 131.7 kBtu/ft² | 1,452 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
- 1 West 39th Street
- City
- New York City
- State
- New York
- ZIP
- 10018
- Coordinates
- 40.75179, -73.98275
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 1 W 39th Street - LL84 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. Its site EUI of 110.8 kBtu/ft² is about 72% above the average of 64.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 11.9 kgCO₂e/ft² is about twice the group average of 5.8 kgCO₂e/ft².
At 135,332 sq ft, it is about 34% below the average floor area of 205,440 sq ft for those buildings. It was built in 1984, 44 years later 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 1 W 39th Street - LL84's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 1 W 39th Street - LL84, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2023. Site EUI moved from 131.7 kBtu/ft² (2022) to 110.8 kBtu/ft² (2024), a 16% decrease. Reported emissions went from 1,452 tCO₂e to 1,615 tCO₂e over the same span (up 11%).
What does a site EUI of 110.8 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. 1 W 39th Street - LL84's 110.8 kBtu/ft² across 135,332 sq ft works out to about 15 billion Btu (4,395 MWh-equivalent) in 2024. Its source EUI of 283.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,724,449 kWh of electricity and 2,366 thousand gallons of water for the year.
Which law requires 1 W 39th Street - LL84 to report its energy use?
1 W 39th Street - LL84 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:3582816:2024). 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
- 521 West 26th Street· 135,214 sq ft · EUI 46.4 kBtu/ft²
- Greenway Mews Realty LLC· 135,000 sq ft · score 78 (B)
- 390 Fifth Ave LLC· 135,000 sq ft · score 48 (D)
- 535 Eighth Avenue LLC (BBL): 1-00760-0043 (BIN) 1013599· 134,600 sq ft · score 86 (A)
- HRA_4362_Oberia D. Dempsey Multi-Service Center· 134,468 sq ft · score 52 (D)
- West 54th Street, LLC· 134,441 sq ft · score 81 (B)
- 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 1 W 39th Street - LL84's energy grade?
1 W 39th Street - LL84 did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 110.8 kBtu/ft².
How much energy does 1 W 39th Street - LL84 use?
Its 2024 site energy-use intensity was 110.8 kBtu/ft² (283.3 kBtu/ft² source) across 135,332 sq ft, including 3,724,449 kWh of electricity.
What are 1 W 39th Street - LL84's carbon emissions?
1 W 39th Street - LL84 reported 1,615 tCO₂e of greenhouse-gas emissions (11.9 kgCO₂e/ft²) for 2024.
Where is 1 W 39th Street - LL84?
1 W 39th Street - LL84 is at 1 West 39th Street, in New York City, New York 10018. Its coordinates are 40.75179, -73.98275 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 1 W 39th Street - LL84 and when was it built?
1 W 39th Street - LL84 has 135,332 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1984 as its year built. It is classed as office.
Is 1 W 39th Street - LL84 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, “1 W 39th Street - LL84, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/1-w-39th-street-ll84-06446c46 (data as of October 2, 2026).