3521 Dekalb Avenue
Multifamily Housing in New York City, NY · 10467
At a glance
3521 Dekalb Avenue is a 89,250-square-foot multifamily housing building in New York City, New York, built in 1928. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 77 out of 100 (grade B), a site energy-use intensity of 73.7 kBtu/ft² and 406 tCO₂e of greenhouse-gas emissions. That score is higher than 60% 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 | 77 (band B) |
| Site EUI | 73.7 kBtu/ft² |
| Source EUI | 95.3 kBtu/ft² |
| GHG emissions | 406 tCO₂e |
| GHG intensity | 4.5 kgCO₂e/ft² |
| Electricity | 267,012 kWh |
| Natural gas | 56,676 therms |
| Gross floor area | 89,250 sq ft |
| Source record | nyc:30801944:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 77 | +5 | 73.7 kBtu/ft² | 406 tCO₂e |
| 2023 | 72 | 73.6 kBtu/ft² | 403 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
- 3521 Dekalb Avenue
- City
- New York City
- State
- New York
- ZIP
- 10467
- Coordinates
- 40.88289, -73.87996
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 3521 Dekalb 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. 3521 Dekalb Avenue's ENERGY STAR score of 77 compares with an average of 63 across the 22,829 that report a score; it scores higher than 60% of them and lower than 39%. Its site EUI of 73.7 kBtu/ft² is roughly in line with 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 4.5 kgCO₂e/ft² is about 13% below the group average of 5.2 kgCO₂e/ft².
At 89,250 sq ft, it is about 12% below the average floor area of 100,951 sq ft for those buildings. It was built in 1928, 24 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 3521 Dekalb Avenue's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 3521 Dekalb Avenue, covering report years 2023–2024. Its ENERGY STAR score went from 72 in 2023 to 77 in 2024 (+5 points). Site EUI moved from 73.6 kBtu/ft² (2023) to 73.7 kBtu/ft² (2024), an 0% increase. Reported emissions went from 403 tCO₂e to 406 tCO₂e over the same span (up 1%).
What does an ENERGY STAR score of 77 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 77 means the building performs better than about 77% of its national peers. BuildingCensus bands the score into report-card grades; 77 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. 3521 Dekalb Avenue's 73.7 kBtu/ft² across 89,250 sq ft works out to about 6.6 billion Btu (1,928 MWh-equivalent) in 2024. Its source EUI of 95.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 267,012 kWh of electricity and 56,676 therms of natural gas for the year.
Which law requires 3521 Dekalb Avenue to report its energy use?
3521 Dekalb 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:30801944:2024). 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
- 137 Duane Street· 89,248 sq ft · score 49 (D)
- 34-43 60th Street· 89,241 sq ft · score 95 (A)
- 104 West End Avenue· 89,240 sq ft · score 69 (C)
- Scaldafiore: 20-24 through 20-40 31st St (CAMPUS)· 89,205 sq ft · score 44 (D)
- 611 Argyle Rd· 89,201 sq ft · score 56 (C)
- Cypress Hills - Bldg 4· 89,200 sq ft · EUI 25.1 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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- Biggest emitters in New York City
Frequently asked questions
What is 3521 Dekalb Avenue's energy grade?
3521 Dekalb Avenue scores 77 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 3521 Dekalb Avenue use?
Its 2024 site energy-use intensity was 73.7 kBtu/ft² (95.3 kBtu/ft² source) across 89,250 sq ft, including 267,012 kWh of electricity and 56,676 therms of natural gas.
What are 3521 Dekalb Avenue's carbon emissions?
3521 Dekalb Avenue reported 406 tCO₂e of greenhouse-gas emissions (4.5 kgCO₂e/ft²) for 2024.
Where is 3521 Dekalb Avenue?
3521 Dekalb Avenue is in New York City, New York 10467. Its coordinates are 40.88289, -73.87996 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 3521 Dekalb Avenue and when was it built?
3521 Dekalb Avenue has 89,250 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1928 as its year built. It is classed as multifamily housing.
Is 3521 Dekalb 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, “3521 Dekalb Avenue, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/3521-dekalb-avenue-9ef8db7f (data as of October 2, 2026).