135 William Street
Multifamily Housing in New York City, NY · 10038
At a glance
135 William Street is a 65,732-square-foot multifamily housing building in New York City, New York, built in 1905. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 42.5 kBtu/ft² and 225 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 42.5 kBtu/ft² |
| Source EUI | 77.6 kBtu/ft² |
| GHG emissions | 225 tCO₂e |
| GHG intensity | 3.4 kgCO₂e/ft² |
| Electricity | 363,565 kWh |
| Natural gas | 15,526 therms |
| Gross floor area | 65,732 sq ft |
| Source record | nyc:3089523:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 42.5 kBtu/ft² | 225 tCO₂e | |
| 2023 | 100 | +2 | 22.7 kBtu/ft² | 163 tCO₂e |
| 2022 | 98 | 57.3 kBtu/ft² | 282 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 William Street
- City
- New York City
- State
- New York
- ZIP
- 10038
- Coordinates
- 40.70936, -74.00665
Within ~1 km
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- 28 Libertyscore 59
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- 200 West Streetscore 83
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- 120 Broadway Holdings, LLCscore 78
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See also: most efficient in New York City · biggest emitters
How does 135 William 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. Its site EUI of 42.5 kBtu/ft² is about 43% 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 34% below the group average of 5.2 kgCO₂e/ft².
At 65,732 sq ft, it is about 35% below the average floor area of 100,951 sq ft for those buildings. It was built in 1905, 47 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 135 William Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 135 William Street, covering report years 2022–2024. Its ENERGY STAR score went from 98 in 2022 to 100 in 2023 (+2 points). Site EUI moved from 57.3 kBtu/ft² (2022) to 42.5 kBtu/ft² (2024), a 26% decrease. Reported emissions went from 282 tCO₂e to 225 tCO₂e over the same span (down 20%).
What does a site EUI of 42.5 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 William Street's 42.5 kBtu/ft² across 65,732 sq ft works out to about 2.8 billion Btu (819 MWh-equivalent) in 2024. Its source EUI of 77.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 363,565 kWh of electricity and 15,526 therms of natural gas for the year.
Which law requires 135 William Street to report its energy use?
135 William 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:3089523:2024). 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
- AKAM - 588 West End Avenue· 65,730 sq ft · score 71 (B)
- Jupiter Court Corp· 65,730 sq ft · score 86 (A)
- Flower Tenants Corp· 65,718 sq ft · score 90 (A)
- A02340-Flower Tenants Corp· 65,718 sq ft · score 68 (C)
- 449 Troutman Street· 65,711 sq ft · score 79 (B)
- 24-15 Queens Plaza N· 65,710 sq ft · score 35 (D)
- 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 135 William Street's energy grade?
135 William Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 42.5 kBtu/ft².
How much energy does 135 William Street use?
Its 2024 site energy-use intensity was 42.5 kBtu/ft² (77.6 kBtu/ft² source) across 65,732 sq ft, including 363,565 kWh of electricity and 15,526 therms of natural gas.
What are 135 William Street's carbon emissions?
135 William Street reported 225 tCO₂e of greenhouse-gas emissions (3.4 kgCO₂e/ft²) for 2024.
Where is 135 William Street?
135 William Street is in New York City, New York 10038. Its coordinates are 40.70936, -74.00665 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 135 William Street and when was it built?
135 William Street has 65,732 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1905 as its year built. It is classed as multifamily housing.
Is 135 William 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 William Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/135-william-street-d126be00 (data as of October 2, 2026).