CHELSEA ADDITION
Multifamily Housing in New York City, NY · 436 WEST 27TH DRIVE · 10001
At a glance
CHELSEA ADDITION is a 131,916-square-foot multifamily housing building at 436 WEST 27TH DRIVE in New York City, New York, built in 1968. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 19.0 kBtu/ft² and 288 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 19.0 kBtu/ft² |
| Source EUI | 53.1 kBtu/ft² |
| GHG emissions | 288 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 733,090 kWh |
| Natural gas | 0 therms |
| Gross floor area | 131,916 sq ft |
| Source record | nyc:2830990:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 19.0 kBtu/ft² | 288 tCO₂e | |
| 2023 | — | 17.9 kBtu/ft² | 249 tCO₂e | |
| 2022 | 100 | 19.5 kBtu/ft² | 206 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
- 436 WEST 27TH DRIVE
- City
- New York City
- State
- New York
- ZIP
- 10001
- Coordinates
- 40.74977, -74.00125
Within ~1 km
Nearby benchmarked buildings
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- 20-30 Hudson Yardsscore —
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See also: most efficient in New York City · biggest emitters
How does CHELSEA ADDITION 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 19.0 kBtu/ft² is about 75% 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 2.2 kgCO₂e/ft² is about 58% below the group average of 5.2 kgCO₂e/ft².
At 131,916 sq ft, it is about 31% above the average floor area of 100,951 sq ft for those buildings. It was built in 1968, 16 years later 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 CHELSEA ADDITION's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for CHELSEA ADDITION, covering report years 2022–2024. Site EUI moved from 19.5 kBtu/ft² (2022) to 19.0 kBtu/ft² (2024), a 3% decrease. Reported emissions went from 206 tCO₂e to 288 tCO₂e over the same span (up 40%).
What does a site EUI of 19.0 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. CHELSEA ADDITION's 19.0 kBtu/ft² across 131,916 sq ft works out to about 2.5 billion Btu (735 MWh-equivalent) in 2024. Its source EUI of 53.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 733,090 kWh of electricity and 0 therms of natural gas for the year.
Which law requires CHELSEA ADDITION to report its energy use?
CHELSEA ADDITION 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:2830990:2024). 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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- Lovett - CAMPUS - 63-85 / 63-93 Woodhaven Boulevard / 85-04 63rd Drive· 131,868 sq ft · score 85 (A)
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- 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 CHELSEA ADDITION's energy grade?
CHELSEA ADDITION did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 19.0 kBtu/ft².
How much energy does CHELSEA ADDITION use?
Its 2024 site energy-use intensity was 19.0 kBtu/ft² (53.1 kBtu/ft² source) across 131,916 sq ft, including 733,090 kWh of electricity and 0 therms of natural gas.
What are CHELSEA ADDITION's carbon emissions?
CHELSEA ADDITION reported 288 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2024.
Where is CHELSEA ADDITION?
CHELSEA ADDITION is at 436 WEST 27TH DRIVE, in New York City, New York 10001. Its coordinates are 40.74977, -74.00125 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is CHELSEA ADDITION and when was it built?
CHELSEA ADDITION has 131,916 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1968 as its year built. It is classed as multifamily housing.
Is CHELSEA ADDITION 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, “CHELSEA ADDITION, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/chelsea-addition-302e6e95 (data as of October 2, 2026).