645 5th Avenue
Mixed Use Property in New York City, NY · 641 5th Avenue · 10022
At a glance
645 5th Avenue is a 934,646-square-foot mixed use property building at 641 5th Avenue in New York City, New York, built in 1973. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 40 out of 100 (grade D), a site energy-use intensity of 94.5 kBtu/ft² and 7,737 tCO₂e of greenhouse-gas emissions. That score is higher than 34% of the 35 scored mixed use property buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 40 (band D) |
| Site EUI | 94.5 kBtu/ft² |
| Source EUI | 179.4 kBtu/ft² |
| GHG emissions | 7,737 tCO₂e |
| GHG intensity | 8.3 kgCO₂e/ft² |
| Electricity | 11,266,054 kWh |
| Water use | 19,786 kgal |
| Gross floor area | 934,646 sq ft |
| Source record | nyc:5848135:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 40 | -6 | 94.5 kBtu/ft² | 7,737 tCO₂e |
| 2023 | 46 | +7 | 87.6 kBtu/ft² | 7,399 tCO₂e |
| 2022 | 39 | 96.0 kBtu/ft² | 7,057 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
- 641 5th Avenue
- City
- New York City
- State
- New York
- ZIP
- 10022
- Coordinates
- 40.75908, -73.97628
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 645 5th Avenue compare with other mixed use property buildings in New York City?
The latest disclosures cover 395 mixed use property buildings in New York City, out of 48,310 buildings citywide. 645 5th Avenue's ENERGY STAR score of 40 compares with an average of 53 across the 35 that report a score; it scores higher than 34% of them and lower than 63%. Its site EUI of 94.5 kBtu/ft² is roughly in line with the average of 92.7 kBtu/ft². Its emissions intensity of 8.3 kgCO₂e/ft² is roughly in line with the group average of 7.9 kgCO₂e/ft².
At 934,646 sq ft, it is about 316% above the average floor area of 224,815 sq ft for those buildings. It was built in 1973, 16 years later than the group's average year built (1958). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has 645 5th Avenue's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 645 5th Avenue, covering report years 2022–2024. Its ENERGY STAR score went from 39 in 2022 to 40 in 2024 (+1 points); its best year on file was 2023, at 46. Site EUI moved from 96.0 kBtu/ft² (2022) to 94.5 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 7,057 tCO₂e to 7,737 tCO₂e over the same span (up 10%).
What does an ENERGY STAR score of 40 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 40 means the building performs better than about 40% of its national peers. BuildingCensus bands the score into report-card grades; 40 falls in band D — lowest band (1–54). It sits 35 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. 645 5th Avenue's 94.5 kBtu/ft² across 934,646 sq ft works out to about 88.3 billion Btu (25,885 MWh-equivalent) in 2024. Its source EUI of 179.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 11,266,054 kWh of electricity and 19,786 thousand gallons of water for the year.
Which law requires 645 5th Avenue to report its energy use?
645 5th Avenue 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:5848135:2024). 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 mixed use property buildings in New York City
- Wagner College Full Campus· 819,511 sq ft · EUI 63.0 kBtu/ft²
- 240 E 38th St/221 E 37th St· 719,945 sq ft · EUI 204.2 kBtu/ft²
- 42nd Street· 631,262 sq ft · EUI 144.0 kBtu/ft²
- 265 Cherry Street - Data· 627,895 sq ft
- 120 Park Avenue (118 PARK AVENUE)· 594,830 sq ft · EUI 103.2 kBtu/ft²
- 150 East 58th Street· 593,382 sq ft · score 58 (C)
- Mixed Use Property buildings in New York City· 395 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 645 5th Avenue's energy grade?
645 5th Avenue scores 40 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 645 5th Avenue use?
Its 2024 site energy-use intensity was 94.5 kBtu/ft² (179.4 kBtu/ft² source) across 934,646 sq ft, including 11,266,054 kWh of electricity.
What are 645 5th Avenue's carbon emissions?
645 5th Avenue reported 7,737 tCO₂e of greenhouse-gas emissions (8.3 kgCO₂e/ft²) for 2024.
Where is 645 5th Avenue?
645 5th Avenue is at 641 5th Avenue, in New York City, New York 10022. Its coordinates are 40.75908, -73.97628 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 645 5th Avenue and when was it built?
645 5th Avenue has 934,646 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1973 as its year built. It is classed as mixed use property.
Is 645 5th Avenue 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, “645 5th Avenue, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/645-5th-avenue-e683c0c8 (data as of October 2, 2026).