Seoul Plaza I
Multifamily Housing in New York City, NY · 36-41 Union Street · 11354
At a glance
Seoul Plaza I is a 37,255-square-foot multifamily housing building at 36-41 Union Street in New York City, New York, built in 1961. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 40 out of 100 (grade D), a site energy-use intensity of 101.8 kBtu/ft² and 239 tCO₂e of greenhouse-gas emissions. That score is higher than 24% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 40 (band D) |
| Site EUI | 101.8 kBtu/ft² |
| Source EUI | 138.7 kBtu/ft² |
| GHG emissions | 239 tCO₂e |
| GHG intensity | 6.4 kgCO₂e/ft² |
| Electricity | 198,243 kWh |
| Natural gas | 31,158 therms |
| Gross floor area | 37,255 sq ft |
| Source record | nyc:6313266:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 40 | -2 | 101.8 kBtu/ft² | 239 tCO₂e |
| 2022 | 42 | 107.0 kBtu/ft² | 233 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
- 36-41 Union Street
- City
- New York City
- State
- New York
- ZIP
- 11354
- Coordinates
- 40.76320, -73.82789
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Seoul Plaza I 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. Seoul Plaza I's ENERGY STAR score of 40 compares with an average of 63 across the 22,829 that report a score; it scores higher than 24% of them and lower than 75%. Its site EUI of 101.8 kBtu/ft² is about 36% 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 6.4 kgCO₂e/ft² is about 23% above the group average of 5.2 kgCO₂e/ft².
At 37,255 sq ft, it is about 63% below the average floor area of 100,951 sq ft for those buildings. It was built in 1961, 9 years later 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 Seoul Plaza I's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for Seoul Plaza I, covering report years 2022–2023. Its ENERGY STAR score went from 42 in 2022 to 40 in 2023 (-2 points); its best year on file was 2022, at 42. Site EUI moved from 107.0 kBtu/ft² (2022) to 101.8 kBtu/ft² (2023), a 5% decrease. Reported emissions went from 233 tCO₂e to 239 tCO₂e over the same span (up 2%).
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. Seoul Plaza I's 101.8 kBtu/ft² across 37,255 sq ft works out to about 3.8 billion Btu (1,111 MWh-equivalent) in 2023. Its source EUI of 138.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 198,243 kWh of electricity and 31,158 therms of natural gas for the year.
Which law requires Seoul Plaza I to report its energy use?
Seoul Plaza I 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:6313266:2023). 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 multifamily housing buildings in New York City
- 158 West 81st Street· 37,251 sq ft · score 77 (B)
- 158 West 81st Street· 37,251 sq ft · score 68 (C)
- 130 Van Cort Corp· 37,250 sq ft · score 100 (A)
- 383 S. 3rd Street· 37,246 sq ft · score 88 (A)
- 33 Greene Street Corp· 37,246 sq ft · EUI 71.8 kBtu/ft²
- DEPM 1290 CHILD - 114 Greene St· 37,240 sq ft
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
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- Biggest emitters in New York City
Frequently asked questions
What is Seoul Plaza I's energy grade?
Seoul Plaza I scores 40 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Seoul Plaza I use?
Its 2023 site energy-use intensity was 101.8 kBtu/ft² (138.7 kBtu/ft² source) across 37,255 sq ft, including 198,243 kWh of electricity and 31,158 therms of natural gas.
What are Seoul Plaza I's carbon emissions?
Seoul Plaza I reported 239 tCO₂e of greenhouse-gas emissions (6.4 kgCO₂e/ft²) for 2023.
Where is Seoul Plaza I?
Seoul Plaza I is at 36-41 Union Street, in New York City, New York 11354. Its coordinates are 40.76320, -73.82789 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Seoul Plaza I and when was it built?
Seoul Plaza I has 37,255 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1961 as its year built. It is classed as multifamily housing.
Is Seoul Plaza I 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, “Seoul Plaza I, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/seoul-plaza-i-45b46a9d (data as of October 2, 2026).