645 OWNERS CORP
Multifamily Housing in New York City, NY · 641 EAST 26 STREET · 11210
At a glance
645 OWNERS CORP is a 78,660-square-foot multifamily housing building at 641 EAST 26 STREET in New York City, New York, built in 1931. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 84 out of 100 (grade B), a site energy-use intensity of 71.1 kBtu/ft² and 336 tCO₂e of greenhouse-gas emissions. That score is higher than 68% 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 | 84 (band B) |
| Site EUI | 71.1 kBtu/ft² |
| Source EUI | 88.7 kBtu/ft² |
| GHG emissions | 336 tCO₂e |
| GHG intensity | 4.3 kgCO₂e/ft² |
| Electricity | 184,939 kWh |
| Natural gas | 49,616 therms |
| Water use | 966 kgal |
| Gross floor area | 78,660 sq ft |
| Source record | nyc:15596277:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 84 | -1 | 71.1 kBtu/ft² | 336 tCO₂e |
| 2023 | 85 | ±0 | 68.3 kBtu/ft² | 323 tCO₂e |
| 2022 | 85 | 72.9 kBtu/ft² | 326 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
- 641 EAST 26 STREET
- City
- New York City
- State
- New York
- ZIP
- 11210
- Coordinates
- 40.63488, -73.95226
Within ~1 km
Nearby benchmarked buildings
- Benchmarking Group - 33score —
College/University · 2,518,921 sq ft
Enclosed Mall · 840,108 sq ft
- AKAM - 1655 Flatbush Avenuescore 18
Multifamily Housing · 723,450 sq ft
- Flatbush Gardens D-Courtscore 24
Multifamily Housing · 438,648 sq ft
- Flatbush Gardens C-Courtscore 42
Multifamily Housing · 431,086 sq ft
- 1350 New York Avenuescore 29
Multifamily Housing · 412,128 sq ft
See also: most efficient in New York City · biggest emitters
How does 645 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. 645 OWNERS CORP's ENERGY STAR score of 84 compares with an average of 63 across the 22,829 that report a score; it scores higher than 68% of them and lower than 30%. Its site EUI of 71.1 kBtu/ft² is roughly in line with the average of 74.9 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.3 kgCO₂e/ft² is about 18% below the group average of 5.2 kgCO₂e/ft².
At 78,660 sq ft, it is about 22% below the average floor area of 100,951 sq ft for those buildings. It was built in 1931, 21 years earlier than 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 645 OWNERS CORP's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 645 OWNERS CORP, covering report years 2022–2024. Its ENERGY STAR score went from 85 in 2022 to 84 in 2024 (-1 points); its best year on file was 2022, at 85. Site EUI moved from 72.9 kBtu/ft² (2022) to 71.1 kBtu/ft² (2024), a 2% decrease. Reported emissions went from 326 tCO₂e to 336 tCO₂e over the same span (up 3%).
What does an ENERGY STAR score of 84 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 84 means the building performs better than about 84% of its national peers. BuildingCensus bands the score into report-card grades; 84 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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 OWNERS CORP's 71.1 kBtu/ft² across 78,660 sq ft works out to about 5.6 billion Btu (1,639 MWh-equivalent) in 2024. Its source EUI of 88.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 184,939 kWh of electricity, 49,616 therms of natural gas and 966 thousand gallons of water for the year.
Which law requires 645 OWNERS CORP to report its energy use?
645 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:15596277:2024). 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
- 110-20 73rd Road· 78,650 sq ft · score 40 (D)
- 23 RENWICK STREET - 22666· 78,649 sq ft · score 30 (D)
- 12 East 22nd Street· 78,646 sq ft · score 2 (D)
- 12 East 22nd Street· 78,646 sq ft · score 8 (D)
- U.H.O: 1690 LONGFELLOW AVENUE· 78,645 sq ft · score 64 (C)
- Triumph Real Estate - 63-25 Saunders St· 78,643 sq ft · score 98 (A)
- 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 645 OWNERS CORP's energy grade?
645 OWNERS CORP scores 84 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 645 OWNERS CORP use?
Its 2024 site energy-use intensity was 71.1 kBtu/ft² (88.7 kBtu/ft² source) across 78,660 sq ft, including 184,939 kWh of electricity and 49,616 therms of natural gas.
What are 645 OWNERS CORP's carbon emissions?
645 OWNERS CORP reported 336 tCO₂e of greenhouse-gas emissions (4.3 kgCO₂e/ft²) for 2024.
Where is 645 OWNERS CORP?
645 OWNERS CORP is at 641 EAST 26 STREET, in New York City, New York 11210. Its coordinates are 40.63488, -73.95226 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 645 OWNERS CORP and when was it built?
645 OWNERS CORP has 78,660 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1931 as its year built. It is classed as multifamily housing.
Is 645 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).
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, “645 OWNERS CORP, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/645-owners-corp-a2eea02c (data as of October 2, 2026).