6645 Owners Corp.
Multifamily Housing in New York City, NY · 6645 Broadway · 10471
At a glance
6645 Owners Corp. is a 54,635-square-foot multifamily housing building at 6645 Broadway in New York City, New York, built in 1951. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 70 out of 100 (grade B), a site energy-use intensity of 92.0 kBtu/ft² and 404 tCO₂e of greenhouse-gas emissions. That score is higher than 51% 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 | 70 (band B) |
| Site EUI | 92.0 kBtu/ft² |
| Source EUI | 117.6 kBtu/ft² |
| GHG emissions | 404 tCO₂e |
| GHG intensity | 7.4 kgCO₂e/ft² |
| Electricity | 220,351 kWh |
| Natural gas | 0 therms |
| Water use | 3,279 kgal |
| Gross floor area | 54,635 sq ft |
| Source record | nyc:26538168:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 70 | -30 | 92.0 kBtu/ft² | 404 tCO₂e |
| 2023 | 100 | ±0 | 14.2 kBtu/ft² | 84 tCO₂e |
| 2022 | 100 | 14.1 kBtu/ft² | 65 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
- 6645 Broadway
- City
- New York City
- State
- New York
- ZIP
- 10471
- Coordinates
- 40.90980, -73.89661
Within ~1 km
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- DEPM 2708 - 5400 Fieldston Roadscore 56
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See also: most efficient in New York City · biggest emitters
How does 6645 Owners 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. 6645 Owners Corp.'s ENERGY STAR score of 70 compares with an average of 63 across the 22,829 that report a score; it scores higher than 51% of them and lower than 48%. Its site EUI of 92.0 kBtu/ft² is about 23% above the average of 74.9 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 7.4 kgCO₂e/ft² is about 42% above the group average of 5.2 kgCO₂e/ft².
At 54,635 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. Its 1951 construction date is close to 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 6645 Owners Corp.'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 6645 Owners Corp., covering report years 2022–2024. Its ENERGY STAR score went from 100 in 2022 to 70 in 2024 (-30 points); its best year on file was 2022, at 100. Site EUI moved from 14.1 kBtu/ft² (2022) to 92.0 kBtu/ft² (2024), an 552% increase. Reported emissions went from 65 tCO₂e to 404 tCO₂e over the same span (up 519%).
What does an ENERGY STAR score of 70 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 70 means the building performs better than about 70% of its national peers. BuildingCensus bands the score into report-card grades; 70 falls in band B — above median (70–84). It sits 5 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. 6645 Owners Corp.'s 92.0 kBtu/ft² across 54,635 sq ft works out to about 5 billion Btu (1,473 MWh-equivalent) in 2024. Its source EUI of 117.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 220,351 kWh of electricity, 0 therms of natural gas and 3,279 thousand gallons of water for the year.
Which law requires 6645 Owners Corp. to report its energy use?
6645 Owners 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:26538168:2024). 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
- OneVesta: 2830 Briggs Ave· 54,634 sq ft · score 100 (A)
- DEPM 1042 - 130 Jane Street· 54,634 sq ft · score 56 (C)
- Coney 1261 Schenectady· 54,600 sq ft
- Pinnacle - 877 Bay Ridge Ave· 54,600 sq ft · score 29 (D)
- George & L Realty - 139-29 34th Road· 54,600 sq ft · score 7 (D)
- Fox Point· 54,600 sq ft · score 25 (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 6645 Owners Corp.'s energy grade?
6645 Owners Corp. scores 70 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 6645 Owners Corp. use?
Its 2024 site energy-use intensity was 92.0 kBtu/ft² (117.6 kBtu/ft² source) across 54,635 sq ft, including 220,351 kWh of electricity and 0 therms of natural gas.
What are 6645 Owners Corp.'s carbon emissions?
6645 Owners Corp. reported 404 tCO₂e of greenhouse-gas emissions (7.4 kgCO₂e/ft²) for 2024.
Where is 6645 Owners Corp.?
6645 Owners Corp. is at 6645 Broadway, in New York City, New York 10471. Its coordinates are 40.90980, -73.89661 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 6645 Owners Corp. and when was it built?
6645 Owners Corp. has 54,635 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1951 as its year built. It is classed as multifamily housing.
Is 6645 Owners 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, “6645 Owners Corp., New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/6645-owners-corp-e5cfd061 (data as of October 2, 2026).