1635 Union Street
Multifamily Housing in New York City, NY · 11213
At a glance
1635 Union Street is a 35,148-square-foot multifamily housing building in New York City, New York, built in 1922. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 71 out of 100 (grade B), a site energy-use intensity of 97.2 kBtu/ft² and 203 tCO₂e of greenhouse-gas emissions. That score is higher than 52% 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 | 71 (band B) |
| Site EUI | 97.2 kBtu/ft² |
| Source EUI | 121.4 kBtu/ft² |
| GHG emissions | 203 tCO₂e |
| GHG intensity | 5.8 kgCO₂e/ft² |
| Electricity | 113,843 kWh |
| Natural gas | 30,273 therms |
| Water use | 2,907 kgal |
| Gross floor area | 35,148 sq ft |
| Source record | nyc:6682262:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 71 | +4 | 97.2 kBtu/ft² | 203 tCO₂e |
| 2022 | 67 | 106.1 kBtu/ft² | 211 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
- 1635 Union Street
- City
- New York City
- State
- New York
- ZIP
- 11213
- Coordinates
- 40.66810, -73.93599
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 1635 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. 1635 Union Street's ENERGY STAR score of 71 compares with an average of 63 across the 22,829 that report a score; it scores higher than 52% of them and lower than 47%. Its site EUI of 97.2 kBtu/ft² is about 30% 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 5.8 kgCO₂e/ft² is about 12% above the group average of 5.2 kgCO₂e/ft².
At 35,148 sq ft, it is about 65% below the average floor area of 100,951 sq ft for those buildings. It was built in 1922, 30 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 1635 Union Street's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 1635 Union Street, covering report years 2022–2023. Its ENERGY STAR score went from 67 in 2022 to 71 in 2023 (+4 points). Site EUI moved from 106.1 kBtu/ft² (2022) to 97.2 kBtu/ft² (2023), a 8% decrease. Reported emissions went from 211 tCO₂e to 203 tCO₂e over the same span (down 4%).
What does an ENERGY STAR score of 71 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 71 means the building performs better than about 71% of its national peers. BuildingCensus bands the score into report-card grades; 71 falls in band B — above median (70–84). It sits 4 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. 1635 Union Street's 97.2 kBtu/ft² across 35,148 sq ft works out to about 3.4 billion Btu (1,001 MWh-equivalent) in 2023. Its source EUI of 121.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 113,843 kWh of electricity, 30,273 therms of natural gas and 2,907 thousand gallons of water for the year.
Which law requires 1635 Union Street to report its energy use?
1635 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 2023 disclosure (source record nyc:6682262:2023). 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
- Pinnacle - 147-03 Northern Boulevard· 35,139 sq ft · score 16 (D)
- JC Dwight - 15 ABINGDON SQUARE· 35,136 sq ft · score 90 (A)
- Coltown - 133 Fort George Avenue· 35,135 sq ft · score 8 (D)
- Shyraz: 93 Underhill Ave· 35,133 sq ft · score 100 (A)
- 1247 M&F MANAGEMENT LLC· 35,133 sq ft
- 732 West End Avenue· 35,130 sq ft · EUI 70.7 kBtu/ft²
- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
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- Least efficient large buildings in New York City
- Biggest emitters in New York City
Frequently asked questions
What is 1635 Union Street's energy grade?
1635 Union Street scores 71 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 1635 Union Street use?
Its 2023 site energy-use intensity was 97.2 kBtu/ft² (121.4 kBtu/ft² source) across 35,148 sq ft, including 113,843 kWh of electricity and 30,273 therms of natural gas.
What are 1635 Union Street's carbon emissions?
1635 Union Street reported 203 tCO₂e of greenhouse-gas emissions (5.8 kgCO₂e/ft²) for 2023.
Where is 1635 Union Street?
1635 Union Street is in New York City, New York 11213. Its coordinates are 40.66810, -73.93599 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 1635 Union Street and when was it built?
1635 Union Street has 35,148 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1922 as its year built. It is classed as multifamily housing.
Is 1635 Union Street 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, “1635 Union Street, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/1635-union-street-15f305f4 (data as of October 2, 2026).