Park Avenue & 77th St. Corp.
Multifamily Housing in New York City, NY · 850 Park Ave · 10075
At a glance
Park Avenue & 77th St. Corp. is a 160,398-square-foot multifamily housing building at 850 Park Ave in New York City, New York, built in 1915. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 61.7 kBtu/ft² and 687 tCO₂e of greenhouse-gas emissions. That score is higher than 64% 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 | 81 (band B) |
| Site EUI | 61.7 kBtu/ft² |
| Source EUI | 93.1 kBtu/ft² |
| GHG emissions | 687 tCO₂e |
| GHG intensity | 4.3 kgCO₂e/ft² |
| Electricity | 761,466 kWh |
| Natural gas | 73,006 therms |
| Water use | 3,389 kgal |
| Gross floor area | 160,398 sq ft |
| Source record | nyc:2790729:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 81 | +6 | 61.7 kBtu/ft² | 687 tCO₂e |
| 2023 | 75 | -5 | 59.6 kBtu/ft² | 658 tCO₂e |
| 2022 | 80 | 61.7 kBtu/ft² | 612 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
- 850 Park Ave
- City
- New York City
- State
- New York
- ZIP
- 10075
- Coordinates
- 40.77413, -73.96163
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Park Avenue & 77th St. 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. Park Avenue & 77th St. Corp.'s ENERGY STAR score of 81 compares with an average of 63 across the 22,829 that report a score; it scores higher than 64% of them and lower than 34%. Its site EUI of 61.7 kBtu/ft² is about 18% 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 4.3 kgCO₂e/ft² is about 18% below the group average of 5.2 kgCO₂e/ft².
At 160,398 sq ft, it is about 59% above the average floor area of 100,951 sq ft for those buildings. It was built in 1915, 37 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 Park Avenue & 77th St. Corp.'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Park Avenue & 77th St. Corp., covering report years 2022–2024. Its ENERGY STAR score went from 80 in 2022 to 81 in 2024 (+1 points). Site EUI moved from 61.7 kBtu/ft² (2022) to 61.7 kBtu/ft² (2024), an 0% increase. Reported emissions went from 612 tCO₂e to 687 tCO₂e over the same span (up 12%).
What does an ENERGY STAR score of 81 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: a score of 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 falls in band B — above median (70–84). 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. Park Avenue & 77th St. Corp.'s 61.7 kBtu/ft² across 160,398 sq ft works out to about 9.9 billion Btu (2,900 MWh-equivalent) in 2024. Its source EUI of 93.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 761,466 kWh of electricity, 73,006 therms of natural gas and 3,389 thousand gallons of water for the year.
Which law requires Park Avenue & 77th St. Corp. to report its energy use?
Park Avenue & 77th St. 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:2790729:2024). 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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- The Red Oak - 135 W 106th St: The Red Oak - 135 W 106th St· 160,340 sq ft · score 79 (B)
- 333 East 69th Street· 160,311 sq ft
- 333 East 69th Street - Data· 160,311 sq ft
- AAR: 99-11 60th Ave· 160,290 sq ft · score 28 (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 Park Avenue & 77th St. Corp.'s energy grade?
Park Avenue & 77th St. Corp. scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Park Avenue & 77th St. Corp. use?
Its 2024 site energy-use intensity was 61.7 kBtu/ft² (93.1 kBtu/ft² source) across 160,398 sq ft, including 761,466 kWh of electricity and 73,006 therms of natural gas.
What are Park Avenue & 77th St. Corp.'s carbon emissions?
Park Avenue & 77th St. Corp. reported 687 tCO₂e of greenhouse-gas emissions (4.3 kgCO₂e/ft²) for 2024.
Where is Park Avenue & 77th St. Corp.?
Park Avenue & 77th St. Corp. is at 850 Park Ave, in New York City, New York 10075. Its coordinates are 40.77413, -73.96163 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Park Avenue & 77th St. Corp. and when was it built?
Park Avenue & 77th St. Corp. has 160,398 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1915 as its year built. It is classed as multifamily housing.
Is Park Avenue & 77th St. 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, “Park Avenue & 77th St. Corp., New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/park-avenue-amp-77th-st-corp-7484a689 (data as of October 2, 2026).