800 Union St (798 UNION STREET)
Multifamily Housing in New York City, NY · 798 UNION STREET · 11215
At a glance
800 Union St (798 UNION STREET) is a 60,919-square-foot multifamily housing building in New York City, New York, built in 1910. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 36 out of 100 (grade D), a site energy-use intensity of 48.4 kBtu/ft² and 291 tCO₂e of greenhouse-gas emissions. That score is higher than 21% 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 | 36 (band D) |
| Site EUI | 48.4 kBtu/ft² |
| Source EUI | 113.1 kBtu/ft² |
| GHG emissions | 291 tCO₂e |
| GHG intensity | 4.8 kgCO₂e/ft² |
| Electricity | 635,779 kWh |
| Natural gas | 7,769 therms |
| Gross floor area | 60,919 sq ft |
| Source record | nyc:33057224:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 36 | +12 | 48.4 kBtu/ft² | 291 tCO₂e |
| 2023 | 24 | 59.0 kBtu/ft² | 262 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
- 798 UNION STREET
- City
- New York City
- State
- New York
- ZIP
- 11215
- Coordinates
- 40.67467, -73.97602
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 800 Union St (798 UNION STREET) 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. 800 Union St (798 UNION STREET)'s ENERGY STAR score of 36 compares with an average of 63 across the 22,829 that report a score; it scores higher than 21% of them and lower than 78%. Its site EUI of 48.4 kBtu/ft² is about 35% below 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 4.8 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².
At 60,919 sq ft, it is about 40% below the average floor area of 100,951 sq ft for those buildings. It was built in 1910, 42 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 800 Union St (798 UNION STREET)'s energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 800 Union St (798 UNION STREET), covering report years 2023–2024. Its ENERGY STAR score went from 24 in 2023 to 36 in 2024 (+12 points). Site EUI moved from 59.0 kBtu/ft² (2023) to 48.4 kBtu/ft² (2024), a 18% decrease. Reported emissions went from 262 tCO₂e to 291 tCO₂e over the same span (up 11%).
What does an ENERGY STAR score of 36 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 36 means the building performs better than about 36% of its national peers. BuildingCensus bands the score into report-card grades; 36 falls in band D — lowest band (1–54). It sits 39 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. 800 Union St (798 UNION STREET)'s 48.4 kBtu/ft² across 60,919 sq ft works out to about 2.9 billion Btu (864 MWh-equivalent) in 2024. Its source EUI of 113.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 635,779 kWh of electricity and 7,769 therms of natural gas for the year.
Which law requires 800 Union St (798 UNION STREET) to report its energy use?
800 Union St (798 UNION STREET) 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:33057224:2024). 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.
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- 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
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- Biggest emitters in New York City
Frequently asked questions
What is 800 Union St (798 UNION STREET)'s energy grade?
800 Union St (798 UNION STREET) scores 36 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 800 Union St (798 UNION STREET) use?
Its 2024 site energy-use intensity was 48.4 kBtu/ft² (113.1 kBtu/ft² source) across 60,919 sq ft, including 635,779 kWh of electricity and 7,769 therms of natural gas.
What are 800 Union St (798 UNION STREET)'s carbon emissions?
800 Union St (798 UNION STREET) reported 291 tCO₂e of greenhouse-gas emissions (4.8 kgCO₂e/ft²) for 2024.
Where is 800 Union St (798 UNION STREET)?
800 Union St (798 UNION STREET) is in New York City, New York 11215. Its coordinates are 40.67467, -73.97602 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 800 Union St (798 UNION STREET) and when was it built?
800 Union St (798 UNION STREET) has 60,919 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1910 as its year built. It is classed as multifamily housing.
Is 800 Union St (798 UNION STREET) 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, “800 Union St (798 UNION STREET), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/800-union-st-798-union-street-691a46b3 (data as of October 2, 2026).