Assemblage: 331 Park Ave.
Office in New York City, NY · 331 Park Avenue · 10022
At a glance
Assemblage: 331 Park Ave. is a 39,505-square-foot office building at 331 Park Avenue in New York City, New York, built in 1918. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 43 out of 100 (grade D), a site energy-use intensity of 81.5 kBtu/ft² and 350 tCO₂e of greenhouse-gas emissions. That score is higher than 13% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 43 (band D) |
| Site EUI | 81.5 kBtu/ft² |
| Source EUI | 213.4 kBtu/ft² |
| GHG emissions | 350 tCO₂e |
| GHG intensity | 8.9 kgCO₂e/ft² |
| Electricity | 845,988 kWh |
| Natural gas | 3,328 therms |
| Water use | 737 kgal |
| Gross floor area | 39,505 sq ft |
| Source record | nyc:7127865:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 43 | -3 | 81.5 kBtu/ft² | 350 tCO₂e |
| 2023 | 46 | -20 | 76.6 kBtu/ft² | 316 tCO₂e |
| 2022 | 66 | 56.7 kBtu/ft² | 189 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
- 331 Park Avenue
- City
- New York City
- State
- New York
- ZIP
- 10022
- Coordinates
- 40.75752, -73.97373
Within ~1 km
Nearby benchmarked buildings
Office · 8,053,115 sq ft
- Metlife Building (200 Park)score 69
Office · 2,993,388 sq ft
Office · 2,862,565 sq ft
- 1251 Avenue of the Americasscore 77
Office · 2,325,598 sq ft
- 1301 Avenue of the Americasscore 68
Office · 2,030,239 sq ft
- 1211 Avenue of the Americasscore 56
Office · 2,023,847 sq ft
See also: most efficient in New York City · biggest emitters
How does Assemblage: 331 Park Ave. compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. Assemblage: 331 Park Ave.'s ENERGY STAR score of 43 compares with an average of 72 across the 2,519 that report a score; it scores higher than 13% of them and lower than 87%. Its site EUI of 81.5 kBtu/ft² is about 26% above the average of 64.5 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 8.9 kgCO₂e/ft² is about 53% above the group average of 5.8 kgCO₂e/ft².
At 39,505 sq ft, it is about 81% below the average floor area of 205,440 sq ft for those buildings. It was built in 1918, 22 years earlier than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has Assemblage: 331 Park Ave.'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Assemblage: 331 Park Ave., covering report years 2022–2024. Its ENERGY STAR score went from 66 in 2022 to 43 in 2024 (-23 points); its best year on file was 2022, at 66. Site EUI moved from 56.7 kBtu/ft² (2022) to 81.5 kBtu/ft² (2024), an 44% increase. Reported emissions went from 189 tCO₂e to 350 tCO₂e over the same span (up 85%).
What does an ENERGY STAR score of 43 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 43 means the building performs better than about 43% of its national peers. BuildingCensus bands the score into report-card grades; 43 falls in band D — lowest band (1–54). It sits 32 points below 75, the threshold for ENERGY STAR certification. 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. Assemblage: 331 Park Ave.'s 81.5 kBtu/ft² across 39,505 sq ft works out to about 3.2 billion Btu (944 MWh-equivalent) in 2024. Its source EUI of 213.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 845,988 kWh of electricity, 3,328 therms of natural gas and 737 thousand gallons of water for the year.
Which law requires Assemblage: 331 Park Ave. to report its energy use?
Assemblage: 331 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:7127865:2024). 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 office buildings in New York City
- Leba Realty Co· 39,500 sq ft · score 37 (D)
- 258 8th Avenue· 39,500 sq ft
- 5601 1st Ave· 39,432 sq ft · score 85 (A)
- HD Mangement : 35-25 30 Ave· 39,417 sq ft · EUI 119.1 kBtu/ft²
- 1000 South Avenue· 39,412 sq ft · score 37 (D)
- 21-25 44th Avenue AKA 43-32 22nd Street· 39,332 sq ft · score 77 (B)
- Office buildings in New York City· 3,384 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 Assemblage: 331 Park Ave.'s energy grade?
Assemblage: 331 Park Ave. scores 43 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Assemblage: 331 Park Ave. use?
Its 2024 site energy-use intensity was 81.5 kBtu/ft² (213.4 kBtu/ft² source) across 39,505 sq ft, including 845,988 kWh of electricity and 3,328 therms of natural gas.
What are Assemblage: 331 Park Ave.'s carbon emissions?
Assemblage: 331 Park Ave. reported 350 tCO₂e of greenhouse-gas emissions (8.9 kgCO₂e/ft²) for 2024.
Where is Assemblage: 331 Park Ave.?
Assemblage: 331 Park Ave. is at 331 Park Avenue, in New York City, New York 10022. Its coordinates are 40.75752, -73.97373 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Assemblage: 331 Park Ave. and when was it built?
Assemblage: 331 Park Ave. has 39,505 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1918 as its year built. It is classed as office.
Is Assemblage: 331 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).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Assemblage: 331 Park Ave., New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/assemblage-331-park-ave-906c9a54 (data as of October 2, 2026).