6402 23 Avenue
Multifamily Housing in New York City, NY · 11204
At a glance
6402 23 Avenue is a 25,710-square-foot multifamily housing building in New York City, New York, built in 1928. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 22 out of 100 (grade D), a site energy-use intensity of 99.7 kBtu/ft² and 151 tCO₂e of greenhouse-gas emissions. That score is higher than 13% 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 | 22 (band D) |
| Site EUI | 99.7 kBtu/ft² |
| Source EUI | 122.7 kBtu/ft² |
| GHG emissions | 151 tCO₂e |
| GHG intensity | 5.9 kgCO₂e/ft² |
| Electricity | 77,528 kWh |
| Natural gas | 22,986 therms |
| Water use | 1,968 kgal |
| Gross floor area | 25,710 sq ft |
| Source record | nyc:6806444:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 22 | ±0 | 99.7 kBtu/ft² | 151 tCO₂e |
| 2022 | 22 | 110.6 kBtu/ft² | 160 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
- 6402 23 Avenue
- City
- New York City
- State
- New York
- ZIP
- 11204
- Coordinates
- 40.61301, -73.97868
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 6402 23 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. 6402 23 Avenue's ENERGY STAR score of 22 compares with an average of 63 across the 22,829 that report a score; it scores higher than 13% of them and lower than 87%. Its site EUI of 99.7 kBtu/ft² is about 33% 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 5.9 kgCO₂e/ft² is about 13% above the group average of 5.2 kgCO₂e/ft².
At 25,710 sq ft, it is about 75% 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 6402 23 Avenue's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 6402 23 Avenue, covering report years 2022–2023. Its ENERGY STAR score was 22 in both 2022 and 2023. Site EUI moved from 110.6 kBtu/ft² (2022) to 99.7 kBtu/ft² (2023), a 10% decrease. Reported emissions went from 160 tCO₂e to 151 tCO₂e over the same span (down 6%).
What does an ENERGY STAR score of 22 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 22 means the building performs better than about 22% of its national peers. BuildingCensus bands the score into report-card grades; 22 falls in band D — lowest band (1–54). It sits 53 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. 6402 23 Avenue's 99.7 kBtu/ft² across 25,710 sq ft works out to about 2.6 billion Btu (751 MWh-equivalent) in 2023. Its source EUI of 122.7 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 77,528 kWh of electricity, 22,986 therms of natural gas and 1,968 thousand gallons of water for the year.
Which law requires 6402 23 Avenue to report its energy use?
6402 23 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 2023 disclosure (source record nyc:6806444:2023). 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
- 17 Catherine Street· 25,700 sq ft · score 14 (D)
- 336 East 81st Street· 25,700 sq ft · score 88 (A)
- Brownstone - 6402 23rd Ave· 25,700 sq ft · score 24 (D)
- 1322 East 14 Street· 25,683 sq ft · score 73 (B)
- 64-24 Queens Boulevard· 25,680 sq ft · score 86 (A)
- 3214 Beverly Road· 25,675 sq ft · score 100 (A)
- 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 6402 23 Avenue's energy grade?
6402 23 Avenue scores 22 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 6402 23 Avenue use?
Its 2023 site energy-use intensity was 99.7 kBtu/ft² (122.7 kBtu/ft² source) across 25,710 sq ft, including 77,528 kWh of electricity and 22,986 therms of natural gas.
What are 6402 23 Avenue's carbon emissions?
6402 23 Avenue reported 151 tCO₂e of greenhouse-gas emissions (5.9 kgCO₂e/ft²) for 2023.
Where is 6402 23 Avenue?
6402 23 Avenue is in New York City, New York 11204. Its coordinates are 40.61301, -73.97868 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 6402 23 Avenue and when was it built?
6402 23 Avenue has 25,710 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1928 as its year built. It is classed as multifamily housing.
Is 6402 23 Avenue 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, “6402 23 Avenue, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/6402-23-avenue-82326421 (data as of October 2, 2026).