George Kotsonis
Office in New York City, NY · 808 Union Street · 11215
At a glance
George Kotsonis is a 25,370-square-foot office building at 808 Union Street in New York City, New York, built in 1929. In its 2023 New York City benchmarking disclosure it reported a site energy-use intensity of 52.9 kBtu/ft² and 128 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 52.9 kBtu/ft² |
| Source EUI | 125.5 kBtu/ft² |
| GHG emissions | 128 tCO₂e |
| GHG intensity | 5.0 kgCO₂e/ft² |
| Electricity | 297,133 kWh |
| Natural gas | 3,284 therms |
| Water use | 417 kgal |
| Gross floor area | 25,370 sq ft |
| Source record | nyc:21546220:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | 52.9 kBtu/ft² | 128 tCO₂e | |
| 2022 | — | 53.3 kBtu/ft² | 103 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
- 808 Union Street
- City
- New York City
- State
- New York
- ZIP
- 11215
- Coordinates
- 40.67454, -73.97568
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does George Kotsonis 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. Its site EUI of 52.9 kBtu/ft² is about 18% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 5.0 kgCO₂e/ft² is about 14% below the group average of 5.8 kgCO₂e/ft².
At 25,370 sq ft, it is about 88% below 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 George Kotsonis's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for George Kotsonis, covering report years 2022–2023. Site EUI moved from 53.3 kBtu/ft² (2022) to 52.9 kBtu/ft² (2023), a 1% decrease. Reported emissions went from 103 tCO₂e to 128 tCO₂e over the same span (up 24%).
What does a site EUI of 52.9 kBtu/ft² mean?
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. George Kotsonis's 52.9 kBtu/ft² across 25,370 sq ft works out to about 1.3 billion Btu (393 MWh-equivalent) in 2023. Its source EUI of 125.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 297,133 kWh of electricity, 3,284 therms of natural gas and 417 thousand gallons of water for the year.
Which law requires George Kotsonis to report its energy use?
George Kotsonis 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 2023 disclosure (source record nyc:21546220:2023). 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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- MANNY INT'L CORP· 25,300 sq ft · score 96 (A)
- 462 36th Street· 25,256 sq ft · score 74 (B)
- 32-36 Richmond Terrace· 25,242 sq ft · score 52 (D)
- 110-112 West 27th Street· 25,200 sq ft · score 82 (B)
- 5501 New Utrecht Ave· 25,151 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 George Kotsonis's energy grade?
George Kotsonis did not report an ENERGY STAR score in its 2023 disclosure, but its site energy-use intensity was 52.9 kBtu/ft².
How much energy does George Kotsonis use?
Its 2023 site energy-use intensity was 52.9 kBtu/ft² (125.5 kBtu/ft² source) across 25,370 sq ft, including 297,133 kWh of electricity and 3,284 therms of natural gas.
What are George Kotsonis's carbon emissions?
George Kotsonis reported 128 tCO₂e of greenhouse-gas emissions (5.0 kgCO₂e/ft²) for 2023.
Where is George Kotsonis?
George Kotsonis is at 808 Union Street, in New York City, New York 11215. Its coordinates are 40.67454, -73.97568 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is George Kotsonis and when was it built?
George Kotsonis has 25,370 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1929 as its year built. It is classed as office.
Is George Kotsonis covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “George Kotsonis, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/george-kotsonis-c71d8e64 (data as of October 2, 2026).