135-139 West 20th Street
Office in New York City, NY · 10011
At a glance
135-139 West 20th Street is a 34,000-square-foot office building in New York City, New York, built in 1903. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 118.0 kBtu/ft² and 349 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 118.0 kBtu/ft² |
| Source EUI | 236.8 kBtu/ft² |
| GHG emissions | 349 tCO₂e |
| GHG intensity | 10.3 kgCO₂e/ft² |
| Electricity | 642,752 kWh |
| Natural gas | 18,183 therms |
| Gross floor area | 34,000 sq ft |
| Source record | nyc:6722391:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 118.0 kBtu/ft² | 349 tCO₂e | |
| 2023 | 12 | -9 | 111.3 kBtu/ft² | 318 tCO₂e |
| 2022 | 21 | 102.2 kBtu/ft² | 240 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
- 135-139 West 20th Street
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.74159, -73.99547
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 135-139 West 20th Street 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 118.0 kBtu/ft² is about 83% 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 10.3 kgCO₂e/ft² is about 77% above the group average of 5.8 kgCO₂e/ft².
At 34,000 sq ft, it is about 83% below the average floor area of 205,440 sq ft for those buildings. It was built in 1903, 37 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 135-139 West 20th Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 135-139 West 20th Street, covering report years 2022–2024. Its ENERGY STAR score went from 21 in 2022 to 12 in 2023 (-9 points); its best year on file was 2022, at 21. Site EUI moved from 102.2 kBtu/ft² (2022) to 118.0 kBtu/ft² (2024), an 15% increase. Reported emissions went from 240 tCO₂e to 349 tCO₂e over the same span (up 45%).
What does a site EUI of 118.0 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. 135-139 West 20th Street's 118.0 kBtu/ft² across 34,000 sq ft works out to about 4 billion Btu (1,176 MWh-equivalent) in 2024. Its source EUI of 236.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 642,752 kWh of electricity and 18,183 therms of natural gas for the year.
Which law requires 135-139 West 20th Street to report its energy use?
135-139 West 20th 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:6722391:2024). 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
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- 964 Dean Street· 33,845 sq ft · EUI 6.0 kBtu/ft²
- 226 Associates LLC· 33,833 sq ft · EUI 229.7 kBtu/ft²
- 135 5th Avenue· 33,816 sq ft · score 65 (C)
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- 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 135-139 West 20th Street's energy grade?
135-139 West 20th Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 118.0 kBtu/ft².
How much energy does 135-139 West 20th Street use?
Its 2024 site energy-use intensity was 118.0 kBtu/ft² (236.8 kBtu/ft² source) across 34,000 sq ft, including 642,752 kWh of electricity and 18,183 therms of natural gas.
What are 135-139 West 20th Street's carbon emissions?
135-139 West 20th Street reported 349 tCO₂e of greenhouse-gas emissions (10.3 kgCO₂e/ft²) for 2024.
Where is 135-139 West 20th Street?
135-139 West 20th Street is in New York City, New York 10011. Its coordinates are 40.74159, -73.99547 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 135-139 West 20th Street and when was it built?
135-139 West 20th Street has 34,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1903 as its year built. It is classed as office.
Is 135-139 West 20th 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, “135-139 West 20th Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/135-139-west-20th-street-34b1dc5f (data as of October 2, 2026).