Cornerstone: 427 Washington
Multifamily Housing in New York City, NY · 427 Washington St · 10013
At a glance
Cornerstone: 427 Washington is a 47,730-square-foot multifamily housing building at 427 Washington St in New York City, New York, built in 1920. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 48.8 kBtu/ft² and 211 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 48.8 kBtu/ft² |
| Source EUI | 84.7 kBtu/ft² |
| GHG emissions | 211 tCO₂e |
| GHG intensity | 4.4 kgCO₂e/ft² |
| Electricity | 276,598 kWh |
| Natural gas | 453 therms |
| Water use | 745 kgal |
| Gross floor area | 47,730 sq ft |
| Source record | nyc:6309233:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 48.8 kBtu/ft² | 211 tCO₂e | |
| 2023 | — | 48.4 kBtu/ft² | 191 tCO₂e | |
| 2022 | — | 54.2 kBtu/ft² | 193 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
- 427 Washington St
- City
- New York City
- State
- New York
- ZIP
- 10013
- Coordinates
- 40.72295, -74.01030
Within ~1 km
Nearby benchmarked buildings
Multifamily Housing · 1,737,729 sq ft
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- 32 Sixth Avenuescore —
Office · 1,128,856 sq ft
- Western Union Buildingscore —
Data Center · 1,028,016 sq ft
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- 270 Greenwich Streetscore —
Multifamily Housing · 985,829 sq ft
See also: most efficient in New York City · biggest emitters
How does Cornerstone: 427 Washington 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 48.8 kBtu/ft² is about 35% 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 4.4 kgCO₂e/ft² is about 15% below the group average of 5.2 kgCO₂e/ft².
At 47,730 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1920, 32 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 Cornerstone: 427 Washington's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Cornerstone: 427 Washington, covering report years 2022–2024. Site EUI moved from 54.2 kBtu/ft² (2022) to 48.8 kBtu/ft² (2024), a 10% decrease. Reported emissions went from 193 tCO₂e to 211 tCO₂e over the same span (up 9%).
What does a site EUI of 48.8 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. Cornerstone: 427 Washington's 48.8 kBtu/ft² across 47,730 sq ft works out to about 2.3 billion Btu (683 MWh-equivalent) in 2024. Its source EUI of 84.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 276,598 kWh of electricity, 453 therms of natural gas and 745 thousand gallons of water for the year.
Which law requires Cornerstone: 427 Washington to report its energy use?
Cornerstone: 427 Washington 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:6309233:2024). 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
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- 456 Riverside Dr· 47,712 sq ft · score 24 (D)
- Century - 147 Waverly Place· 47,708 sq ft · EUI 61.2 kBtu/ft²
- 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 Cornerstone: 427 Washington's energy grade?
Cornerstone: 427 Washington did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 48.8 kBtu/ft².
How much energy does Cornerstone: 427 Washington use?
Its 2024 site energy-use intensity was 48.8 kBtu/ft² (84.7 kBtu/ft² source) across 47,730 sq ft, including 276,598 kWh of electricity and 453 therms of natural gas.
What are Cornerstone: 427 Washington's carbon emissions?
Cornerstone: 427 Washington reported 211 tCO₂e of greenhouse-gas emissions (4.4 kgCO₂e/ft²) for 2024.
Where is Cornerstone: 427 Washington?
Cornerstone: 427 Washington is at 427 Washington St, in New York City, New York 10013. Its coordinates are 40.72295, -74.01030 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Cornerstone: 427 Washington and when was it built?
Cornerstone: 427 Washington has 47,730 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1920 as its year built. It is classed as multifamily housing.
Is Cornerstone: 427 Washington 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, “Cornerstone: 427 Washington, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/cornerstone-427-washington-9eab219d (data as of October 2, 2026).