40 West 84th Street Owners Corp
Multifamily Housing in New York City, NY · 40 W. 84Th Street · 10024
At a glance
40 West 84th Street Owners Corp is a 36,265-square-foot multifamily housing building at 40 W. 84Th Street in New York City, New York, built in 1918. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 100 out of 100 (grade A), a site energy-use intensity of 17.2 kBtu/ft² and 60 tCO₂e of greenhouse-gas emissions. That score is higher than 90% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 100 (band A) |
| Site EUI | 17.2 kBtu/ft² |
| Source EUI | 39.2 kBtu/ft² |
| GHG emissions | 60 tCO₂e |
| GHG intensity | 1.7 kgCO₂e/ft² |
| Electricity | 127,821 kWh |
| Natural gas | 1,894 therms |
| Water use | 847 kgal |
| Gross floor area | 36,265 sq ft |
| Source record | nyc:6673659:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 100 | ±0 | 17.2 kBtu/ft² | 60 tCO₂e |
| 2023 | 100 | ±0 | 13.1 kBtu/ft² | 48 tCO₂e |
| 2022 | 100 | 13.1 kBtu/ft² | 38 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
- 40 W. 84Th Street
- City
- New York City
- State
- New York
- ZIP
- 10024
- Coordinates
- 40.78448, -73.97152
Within ~1 km
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How does 40 West 84th Street Owners Corp 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. 40 West 84th Street Owners Corp's ENERGY STAR score of 100 compares with an average of 63 across the 22,829 that report a score; it scores higher than 90% of them. Its site EUI of 17.2 kBtu/ft² is about 77% 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 1.7 kgCO₂e/ft² is about 68% below the group average of 5.2 kgCO₂e/ft².
At 36,265 sq ft, it is about 64% below the average floor area of 100,951 sq ft for those buildings. It was built in 1918, 34 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 40 West 84th Street Owners Corp's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 40 West 84th Street Owners Corp, covering report years 2022–2024. Its ENERGY STAR score was 100 in both 2022 and 2024. Site EUI moved from 13.1 kBtu/ft² (2022) to 17.2 kBtu/ft² (2024), an 31% increase. Reported emissions went from 38 tCO₂e to 60 tCO₂e over the same span (up 58%).
What does an ENERGY STAR score of 100 mean?
ENERGY STAR scores run from 1 to 100 and are computed by the EPA's Portfolio Manager as a percentile against similar buildings nationwide, adjusted for climate, size and use: 100 is the top of the scale. BuildingCensus bands the score into report-card grades; 100 falls in band A — high performer (85–100). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. In New York City, 43% of scored buildings are at 75 or above.
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. 40 West 84th Street Owners Corp's 17.2 kBtu/ft² across 36,265 sq ft works out to about 0.6 billion Btu (183 MWh-equivalent) in 2024. Its source EUI of 39.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 127,821 kWh of electricity, 1,894 therms of natural gas and 847 thousand gallons of water for the year.
Which law requires 40 West 84th Street Owners Corp to report its energy use?
40 West 84th Street Owners Corp 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:6673659:2024). 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.
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Frequently asked questions
What is 40 West 84th Street Owners Corp's energy grade?
40 West 84th Street Owners Corp scores 100 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 40 West 84th Street Owners Corp use?
Its 2024 site energy-use intensity was 17.2 kBtu/ft² (39.2 kBtu/ft² source) across 36,265 sq ft, including 127,821 kWh of electricity and 1,894 therms of natural gas.
What are 40 West 84th Street Owners Corp's carbon emissions?
40 West 84th Street Owners Corp reported 60 tCO₂e of greenhouse-gas emissions (1.7 kgCO₂e/ft²) for 2024.
Where is 40 West 84th Street Owners Corp?
40 West 84th Street Owners Corp is at 40 W. 84Th Street, in New York City, New York 10024. Its coordinates are 40.78448, -73.97152 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 40 West 84th Street Owners Corp and when was it built?
40 West 84th Street Owners Corp has 36,265 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1918 as its year built. It is classed as multifamily housing.
Is 40 West 84th Street Owners Corp 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, “40 West 84th Street Owners Corp, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/40-west-84th-street-owners-corp-adcd9ccc (data as of October 2, 2026).