235 East 45th St
Office in New York City, NY · 10017
At a glance
235 East 45th St is a 200,311-square-foot office building in New York City, New York, built in 1929. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 68 out of 100 (grade C), a site energy-use intensity of 91.7 kBtu/ft² and 1,922 tCO₂e of greenhouse-gas emissions. That score is higher than 32% 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 | 68 (band C) |
| Site EUI | 91.7 kBtu/ft² |
| Source EUI | 214.9 kBtu/ft² |
| GHG emissions | 1,922 tCO₂e |
| GHG intensity | 9.6 kgCO₂e/ft² |
| Electricity | 4,009,674 kWh |
| Natural gas | 82 therms |
| Gross floor area | 200,311 sq ft |
| Source record | nyc:7956798:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 68 | -2 | 91.7 kBtu/ft² | 1,922 tCO₂e |
| 2023 | 70 | -7 | 87.1 kBtu/ft² | 1,752 tCO₂e |
| 2022 | 77 | 66.9 kBtu/ft² | 1,134 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 East 45th St
- City
- New York City
- State
- New York
- ZIP
- 10017
- Coordinates
- 40.75233, -73.97216
Within ~1 km
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- One Vanderbilt Avenuescore 43
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See also: most efficient in New York City · biggest emitters
How does 235 East 45th St 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 East 45th St's ENERGY STAR score of 68 compares with an average of 72 across the 2,519 that report a score; it scores higher than 32% of them and lower than 67%. Its site EUI of 91.7 kBtu/ft² is about 42% 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 9.6 kgCO₂e/ft² is about 65% above the group average of 5.8 kgCO₂e/ft².
At 200,311 sq ft, it is roughly in line with the average floor area of 205,440 sq ft for those buildings. It was built in 1929, 11 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 East 45th St's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 235 East 45th St, covering report years 2022–2024. Its ENERGY STAR score went from 77 in 2022 to 68 in 2024 (-9 points); its best year on file was 2022, at 77. Site EUI moved from 66.9 kBtu/ft² (2022) to 91.7 kBtu/ft² (2024), an 37% increase. Reported emissions went from 1,134 tCO₂e to 1,922 tCO₂e over the same span (up 70%).
What does an ENERGY STAR score of 68 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 68 means the building performs better than about 68% of its national peers. BuildingCensus bands the score into report-card grades; 68 falls in band C — below median (55–69). It sits 7 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 East 45th St's 91.7 kBtu/ft² across 200,311 sq ft works out to about 18.4 billion Btu (5,383 MWh-equivalent) in 2024. Its source EUI of 214.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 4,009,674 kWh of electricity and 82 therms of natural gas for the year.
Which law requires 235 East 45th St to report its energy use?
235 East 45th 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 2024 disclosure (source record nyc:7956798:2024). 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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- Hunters Point Plaza· 199,365 sq ft · score 86 (A)
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- 250 W 39th Street, Inc.· 197,811 sq ft · score 92 (A)
- 307 7th Avenue· 197,612 sq ft · score 81 (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 235 East 45th St's energy grade?
235 East 45th St scores 68 out of 100 on ENERGY STAR — band C, below median (55–69) — 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 East 45th St use?
Its 2024 site energy-use intensity was 91.7 kBtu/ft² (214.9 kBtu/ft² source) across 200,311 sq ft, including 4,009,674 kWh of electricity and 82 therms of natural gas.
What are 235 East 45th St's carbon emissions?
235 East 45th St reported 1,922 tCO₂e of greenhouse-gas emissions (9.6 kgCO₂e/ft²) for 2024.
Where is 235 East 45th St?
235 East 45th St is in New York City, New York 10017. Its coordinates are 40.75233, -73.97216 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 235 East 45th St and when was it built?
235 East 45th St has 200,311 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1929 as its year built. It is classed as office.
Is 235 East 45th St 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 East 45th St, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/235-east-45th-st-ceb1026d (data as of October 2, 2026).