1 William Street
Financial Office in New York City, NY · 10004
At a glance
1 William Street is a 112,500-square-foot financial office in New York City, New York, built in 1907. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 65.4 kBtu/ft² and 768 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 65.4 kBtu/ft² |
| Source EUI | 152.6 kBtu/ft² |
| GHG emissions | 768 tCO₂e |
| GHG intensity | 6.8 kgCO₂e/ft² |
| Electricity | 1,593,869 kWh |
| Natural gas | 71 therms |
| Gross floor area | 112,500 sq ft |
| Source record | nyc:2691165:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 65.4 kBtu/ft² | 768 tCO₂e | |
| 2023 | 73 | -3 | 68.0 kBtu/ft² | 752 tCO₂e |
| 2022 | 76 | 66.0 kBtu/ft² | 605 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 William Street
- City
- New York City
- State
- New York
- ZIP
- 10004
- Coordinates
- 40.70483, -74.00979
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 1 William Street compare with other financial office buildings in New York City?
The latest disclosures cover 48 financial office buildings in New York City, out of 48,310 buildings citywide. Its site EUI of 65.4 kBtu/ft² is about 21% below the average of 82.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 6.8 kgCO₂e/ft² is about 10% below the group average of 7.6 kgCO₂e/ft².
At 112,500 sq ft, it is about 83% below the average floor area of 655,976 sq ft for those buildings. It was built in 1907, 61 years earlier than the group's average year built (1968). Across all 24 jurisdictions BuildingCensus covers, the 161 financial office buildings average an ENERGY STAR score of 72 and a site EUI of 69.2 kBtu/ft².
How has 1 William Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 1 William Street, covering report years 2022–2024. Its ENERGY STAR score went from 76 in 2022 to 73 in 2023 (-3 points); its best year on file was 2022, at 76. Site EUI moved from 66.0 kBtu/ft² (2022) to 65.4 kBtu/ft² (2024), a 1% decrease. Reported emissions went from 605 tCO₂e to 768 tCO₂e over the same span (up 27%).
What does a site EUI of 65.4 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 William Street's 65.4 kBtu/ft² across 112,500 sq ft works out to about 7.4 billion Btu (2,156 MWh-equivalent) in 2024. Its source EUI of 152.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,593,869 kWh of electricity and 71 therms of natural gas for the year.
Which law requires 1 William Street to report its energy use?
1 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:2691165:2024). 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 financial office buildings in New York City
- 500 Park Avenue (Office V2)· 103,178 sq ft · score 4 (D)
- XXXXX· 100,000 sq ft
- Sample 1· 100,000 sq ft
- Beekman Estate - 11 Hanover Sq.· 95,325 sq ft · score 91 (A)
- Moore Bank for the People· 70,000 sq ft
- 451 Broadway· 65,000 sq ft · score 95 (A)
- Financial Office buildings in New York City· 48 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 William Street's energy grade?
1 William Street did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 65.4 kBtu/ft².
How much energy does 1 William Street use?
Its 2024 site energy-use intensity was 65.4 kBtu/ft² (152.6 kBtu/ft² source) across 112,500 sq ft, including 1,593,869 kWh of electricity and 71 therms of natural gas.
What are 1 William Street's carbon emissions?
1 William Street reported 768 tCO₂e of greenhouse-gas emissions (6.8 kgCO₂e/ft²) for 2024.
Where is 1 William Street?
1 William Street is in New York City, New York 10004. Its coordinates are 40.70483, -74.00979 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 1 William Street and when was it built?
1 William Street has 112,500 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1907 as its year built. It is classed as financial office.
Is 1 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, “1 William Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/1-william-street-d9d2ed35 (data as of October 2, 2026).