235 Park Ave So - 10273
Office in New York City, NY · 235 Park Ave So · 10273
At a glance
235 Park Ave So - 10273 is a 94,140-square-foot office building in New York City, New York, built in 1921. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 37 out of 100 (grade D), a site energy-use intensity of 150.7 kBtu/ft² and 1,199 tCO₂e of greenhouse-gas emissions. That score is higher than 11% 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 | 37 (band D) |
| Site EUI | 150.7 kBtu/ft² |
| Source EUI | 265.6 kBtu/ft² |
| GHG emissions | 1,199 tCO₂e |
| GHG intensity | 12.7 kgCO₂e/ft² |
| Electricity | 1,718,195 kWh |
| Natural gas | 44,302 therms |
| Water use | 5,109 kgal |
| Gross floor area | 94,140 sq ft |
| Source record | nyc:3414683:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 37 | +13 | 150.7 kBtu/ft² | 1,199 tCO₂e |
| 2023 | 24 | +6 | 180.2 kBtu/ft² | 1,105 tCO₂e |
| 2022 | 18 | 207.2 kBtu/ft² | 1,048 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
- 235 Park Ave So
- City
- New York City
- State
- New York
- ZIP
- 10273
- Coordinates
- 40.73781, -73.98810
Within ~1 km
Nearby benchmarked buildings
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- One Madison Avenuescore —
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See also: most efficient in New York City · biggest emitters
How does 235 Park Ave So - 10273 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. 235 Park Ave So - 10273's ENERGY STAR score of 37 compares with an average of 72 across the 2,519 that report a score; it scores higher than 11% of them and lower than 89%. Its site EUI of 150.7 kBtu/ft² is about 134% 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 12.7 kgCO₂e/ft² is about twice the group average of 5.8 kgCO₂e/ft².
At 94,140 sq ft, it is about half of the average floor area of 205,440 sq ft for those buildings. It was built in 1921, 19 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 235 Park Ave So - 10273's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 235 Park Ave So - 10273, covering report years 2022–2024. Its ENERGY STAR score went from 18 in 2022 to 37 in 2024 (+19 points). Site EUI moved from 207.2 kBtu/ft² (2022) to 150.7 kBtu/ft² (2024), a 27% decrease. Reported emissions went from 1,048 tCO₂e to 1,199 tCO₂e over the same span (up 14%).
What does an ENERGY STAR score of 37 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 37 means the building performs better than about 37% of its national peers. BuildingCensus bands the score into report-card grades; 37 falls in band D — lowest band (1–54). It sits 38 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. 235 Park Ave So - 10273's 150.7 kBtu/ft² across 94,140 sq ft works out to about 14.2 billion Btu (4,158 MWh-equivalent) in 2024. Its source EUI of 265.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,718,195 kWh of electricity, 44,302 therms of natural gas and 5,109 thousand gallons of water for the year.
Which law requires 235 Park Ave So - 10273 to report its energy use?
235 Park Ave So - 10273 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:3414683:2024). 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
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- Liberty Star: 241 West 37th St· 93,948 sq ft · score 93 (A)
- Liberty Star Management - 241 West 37th St· 93,948 sq ft · score 96 (A)
- 262 W 38th Street· 93,896 sq ft · EUI 30.9 kBtu/ft²
- 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 235 Park Ave So - 10273's energy grade?
235 Park Ave So - 10273 scores 37 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 235 Park Ave So - 10273 use?
Its 2024 site energy-use intensity was 150.7 kBtu/ft² (265.6 kBtu/ft² source) across 94,140 sq ft, including 1,718,195 kWh of electricity and 44,302 therms of natural gas.
What are 235 Park Ave So - 10273's carbon emissions?
235 Park Ave So - 10273 reported 1,199 tCO₂e of greenhouse-gas emissions (12.7 kgCO₂e/ft²) for 2024.
Where is 235 Park Ave So - 10273?
235 Park Ave So - 10273 is in New York City, New York 10273. Its coordinates are 40.73781, -73.98810 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 235 Park Ave So - 10273 and when was it built?
235 Park Ave So - 10273 has 94,140 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1921 as its year built. It is classed as office.
Is 235 Park Ave So - 10273 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, “235 Park Ave So - 10273, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/235-park-ave-so-10273-affc7c91 (data as of October 2, 2026).