823 Park Ave
Multifamily Housing in New York City, NY · 823 PARK AVE. · 10021
At a glance
823 Park Ave is a 61,381-square-foot multifamily housing building at 823 PARK AVE. 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 76.3 kBtu/ft² and 372 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 76.3 kBtu/ft² |
| Source EUI | 136.8 kBtu/ft² |
| GHG emissions | 372 tCO₂e |
| GHG intensity | 6.1 kgCO₂e/ft² |
| Electricity | 582,678 kWh |
| Natural gas | 26,978 therms |
| Water use | 1,701 kgal |
| Gross floor area | 61,381 sq ft |
| Source record | nyc:2669771:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 76.3 kBtu/ft² | 372 tCO₂e | |
| 2023 | — | 72.4 kBtu/ft² | 344 tCO₂e | |
| 2022 | — | 80.0 kBtu/ft² | 327 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
- 823 PARK AVE.
- City
- New York City
- State
- New York
- ZIP
- 10021
- Coordinates
- 40.77321, -73.96228
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 823 Park Ave 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 76.3 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft². Its emissions intensity of 6.1 kgCO₂e/ft² is about 17% above the group average of 5.2 kgCO₂e/ft².
At 61,381 sq ft, it is about 39% below 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 823 Park Ave's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 823 Park Ave, covering report years 2022–2024. Site EUI moved from 80.0 kBtu/ft² (2022) to 76.3 kBtu/ft² (2024), a 5% decrease. Reported emissions went from 327 tCO₂e to 372 tCO₂e over the same span (up 14%).
What does a site EUI of 76.3 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. 823 Park Ave's 76.3 kBtu/ft² across 61,381 sq ft works out to about 4.7 billion Btu (1,373 MWh-equivalent) in 2024. Its source EUI of 136.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 582,678 kWh of electricity, 26,978 therms of natural gas and 1,701 thousand gallons of water for the year.
Which law requires 823 Park Ave to report its energy use?
823 Park Ave 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:2669771:2024). 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
- 500 Nostrand Avenue· 61,380 sq ft · score 19 (D)
- 205 Ocean Parkway - 36849· 61,380 sq ft · score 87 (A)
- Chestnut - 1254 Sherman Avenue· 61,360 sq ft · score 72 (B)
- 234 Skillman Avenue, Brooklyn· 61,356 sq ft · score 82 (B)
- 355 Riverside Drive - data· 61,344 sq ft · score 100 (A)
- Stellar - 118-28 Vermilyea Avenue· 61,338 sq ft · score 8 (D)
- 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 823 Park Ave's energy grade?
823 Park Ave did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 76.3 kBtu/ft².
How much energy does 823 Park Ave use?
Its 2024 site energy-use intensity was 76.3 kBtu/ft² (136.8 kBtu/ft² source) across 61,381 sq ft, including 582,678 kWh of electricity and 26,978 therms of natural gas.
What are 823 Park Ave's carbon emissions?
823 Park Ave reported 372 tCO₂e of greenhouse-gas emissions (6.1 kgCO₂e/ft²) for 2024.
Where is 823 Park Ave?
823 Park Ave is at 823 PARK AVE., in New York City, New York 10021. Its coordinates are 40.77321, -73.96228 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 823 Park Ave and when was it built?
823 Park Ave has 61,381 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 823 Park Ave 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, “823 Park Ave, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/823-park-ave-155b1b24 (data as of October 2, 2026).