525-535 Union Avenue
Multifamily Housing in New York City, NY · 11211
At a glance
525-535 Union Avenue is a 64,688-square-foot multifamily housing building in New York City, New York, built in 2007. 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 33.5 kBtu/ft² and 215 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 | 33.5 kBtu/ft² |
| Source EUI | 78.7 kBtu/ft² |
| GHG emissions | 215 tCO₂e |
| GHG intensity | 3.3 kgCO₂e/ft² |
| Electricity | 471,251 kWh |
| Natural gas | 5,601 therms |
| Gross floor area | 64,688 sq ft |
| Source record | nyc:33154802:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 84 | -2 | 33.5 kBtu/ft² | 215 tCO₂e |
| 2023 | 86 | 33.7 kBtu/ft² | 199 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
- 525-535 Union Avenue
- City
- New York City
- State
- New York
- ZIP
- 11211
- Coordinates
- 40.71623, -73.95199
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 525-535 Union Avenue 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. 525-535 Union Avenue'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 33.5 kBtu/ft² is about 55% 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 3.3 kgCO₂e/ft² is about 36% below the group average of 5.2 kgCO₂e/ft².
At 64,688 sq ft, it is about 36% below the average floor area of 100,951 sq ft for those buildings. It was built in 2007, 55 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 525-535 Union Avenue's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 525-535 Union Avenue, covering report years 2023–2024. Its ENERGY STAR score went from 86 in 2023 to 84 in 2024 (-2 points); its best year on file was 2023, at 86. Site EUI moved from 33.7 kBtu/ft² (2023) to 33.5 kBtu/ft² (2024), a 1% decrease. Reported emissions went from 199 tCO₂e to 215 tCO₂e over the same span (up 8%).
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. 525-535 Union Avenue's 33.5 kBtu/ft² across 64,688 sq ft works out to about 2.2 billion Btu (635 MWh-equivalent) in 2024. Its source EUI of 78.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 471,251 kWh of electricity and 5,601 therms of natural gas for the year.
Which law requires 525-535 Union Avenue to report its energy use?
525-535 Union Avenue 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:33154802:2024). 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
- SAMUEL (MHOP) I· 64,684 sq ft
- 600 West 157th Street· 64,674 sq ft · score 16 (D)
- OneVesta Property Management: 2-40 51st Avenue· 64,664 sq ft · score 45 (D)
- 525 Union Avenue· 64,650 sq ft · score 79 (B)
- 209 West 97th Street AKA 760 Amsterdam Avenue· 64,650 sq ft · score 65 (C)
- 35 CENTRAL PARK N.· 64,644 sq ft · score 28 (D)
- 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 525-535 Union Avenue's energy grade?
525-535 Union Avenue 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 525-535 Union Avenue use?
Its 2024 site energy-use intensity was 33.5 kBtu/ft² (78.7 kBtu/ft² source) across 64,688 sq ft, including 471,251 kWh of electricity and 5,601 therms of natural gas.
What are 525-535 Union Avenue's carbon emissions?
525-535 Union Avenue reported 215 tCO₂e of greenhouse-gas emissions (3.3 kgCO₂e/ft²) for 2024.
Where is 525-535 Union Avenue?
525-535 Union Avenue is in New York City, New York 11211. Its coordinates are 40.71623, -73.95199 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 525-535 Union Avenue and when was it built?
525-535 Union Avenue has 64,688 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2007 as its year built. It is classed as multifamily housing.
Is 525-535 Union Avenue 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, “525-535 Union Avenue, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/525-535-union-avenue-dcefdb12 (data as of October 2, 2026).