439 East 51st St
Multifamily Housing in New York City, NY · 10022
At a glance
439 East 51st St is a 98,808-square-foot multifamily housing building in New York City, New York, built in 1925.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | — |
| Source EUI | — |
| GHG emissions | — |
| GHG intensity | — |
| Electricity | 290,831 kWh |
| Natural gas | 673 therms |
| Gross floor area | 98,808 sq ft |
| Source record | nyc:2669860:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | — | — | |
| 2022 | 98 | 47.6 kBtu/ft² | 359 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 439 East 51st St
- City
- New York City
- State
- New York
- ZIP
- 10022
- Coordinates
- 40.75391, -73.96428
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 439 East 51st St 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.
At 98,808 sq ft, it is roughly in line with the average floor area of 100,951 sq ft for those buildings. It was built in 1925, 27 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 439 East 51st St's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 439 East 51st St, covering report years 2022–2023. Only one of those years carries energy figures.
Which law requires 439 East 51st St to report its energy use?
439 East 51st St 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 2023 disclosure (source record nyc:2669860:2023). 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
- 20 Beekman Place· 98,800 sq ft · score 88 (A)
- Orsid - 47 West 96th Street· 98,788 sq ft · EUI 51.9 kBtu/ft²
- Arabella· 98,785 sq ft · EUI 71.2 kBtu/ft²
- 325 East 57th St· 98,766 sq ft · EUI 32.3 kBtu/ft²
- 441 E 155St· 98,756 sq ft · score 69 (C)
- 441 East 155th Street· 98,756 sq ft · score 94 (A)
- 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 439 East 51st St's energy grade?
439 East 51st St did not report an ENERGY STAR score in its 2023 disclosure.
How much energy does 439 East 51st St use?
No energy-use intensity was reported for 2023.
What are 439 East 51st St's carbon emissions?
No greenhouse-gas emissions figure was reported for 2023.
Where is 439 East 51st St?
439 East 51st St is in New York City, New York 10022. Its coordinates are 40.75391, -73.96428 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 439 East 51st St and when was it built?
439 East 51st St has 98,808 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1925 as its year built. It is classed as multifamily housing.
Is 439 East 51st St covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “439 East 51st St, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/439-east-51st-st-0990255f (data as of October 2, 2026).