21 Audubon Avenue
Medical Office in New York City, NY · 10032
At a glance
21 Audubon Avenue is a 77,500-square-foot medical office in New York City, New York, built in 1925. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 72 out of 100 (grade B), a site energy-use intensity of 62.2 kBtu/ft² and 537 tCO₂e of greenhouse-gas emissions. That score is higher than 45% of the 147 scored medical office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 72 (band B) |
| Site EUI | 62.2 kBtu/ft² |
| Source EUI | 163.8 kBtu/ft² |
| GHG emissions | 537 tCO₂e |
| GHG intensity | 6.9 kgCO₂e/ft² |
| Electricity | 1,281,096 kWh |
| Natural gas | 144 therms |
| Water use | 1,891 kgal |
| Gross floor area | 77,500 sq ft |
| Source record | nyc:28591778:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 72 | -28 | 62.2 kBtu/ft² | 537 tCO₂e |
| 2023 | 100 | ±0 | 79.9 kBtu/ft² | 604 tCO₂e |
| 2022 | 100 | 94.0 kBtu/ft² | 586 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
- 21 Audubon Avenue
- City
- New York City
- State
- New York
- ZIP
- 10032
- Coordinates
- 40.83944, -73.93912
Within ~1 km
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How does 21 Audubon Avenue compare with other medical office buildings in New York City?
The latest disclosures cover 188 medical office buildings in New York City, out of 48,310 buildings citywide. 21 Audubon Avenue's ENERGY STAR score of 72 compares with an average of 65 across the 147 that report a score; it scores higher than 45% of them and lower than 54%. Its site EUI of 62.2 kBtu/ft² is about 36% below the average of 97.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 6.9 kgCO₂e/ft² is about 21% below the group average of 8.8 kgCO₂e/ft².
At 77,500 sq ft, it is roughly in line with the average floor area of 75,019 sq ft for those buildings. It was built in 1925, 40 years earlier than the group's average year built (1965). Across all 24 jurisdictions BuildingCensus covers, the 1,266 medical office buildings average an ENERGY STAR score of 64 and a site EUI of 92.2 kBtu/ft².
How has 21 Audubon Avenue's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 21 Audubon Avenue, covering report years 2022–2024. Its ENERGY STAR score went from 100 in 2022 to 72 in 2024 (-28 points); its best year on file was 2022, at 100. Site EUI moved from 94.0 kBtu/ft² (2022) to 62.2 kBtu/ft² (2024), a 34% decrease. Reported emissions went from 586 tCO₂e to 537 tCO₂e over the same span (down 8%).
What does an ENERGY STAR score of 72 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 72 means the building performs better than about 72% of its national peers. BuildingCensus bands the score into report-card grades; 72 falls in band B — above median (70–84). It sits 3 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. 21 Audubon Avenue's 62.2 kBtu/ft² across 77,500 sq ft works out to about 4.8 billion Btu (1,413 MWh-equivalent) in 2024. Its source EUI of 163.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,281,096 kWh of electricity, 144 therms of natural gas and 1,891 thousand gallons of water for the year.
Which law requires 21 Audubon Avenue to report its energy use?
21 Audubon 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:28591778:2024). 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 medical office buildings in New York City
- Queens Family Medical Center· 75,000 sq ft
- H+H_4312_East New York Diagnostic & Treatment Center· 72,755 sq ft · score 9 (D)
- 23-25 31 Street· 72,000 sq ft · score 99 (A)
- Walter Samuels - 30 E 40th (28 EAST 40 STREET)· 71,063 sq ft · EUI 89.0 kBtu/ft²
- Maimonides Medical Center - 920 48th Street (data only)· 69,953 sq ft
- MSHS. MSBI Fierman Hall· 69,691 sq ft · score 100 (A)
- Medical Office buildings in New York City· 188 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 21 Audubon Avenue's energy grade?
21 Audubon Avenue scores 72 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 21 Audubon Avenue use?
Its 2024 site energy-use intensity was 62.2 kBtu/ft² (163.8 kBtu/ft² source) across 77,500 sq ft, including 1,281,096 kWh of electricity and 144 therms of natural gas.
What are 21 Audubon Avenue's carbon emissions?
21 Audubon Avenue reported 537 tCO₂e of greenhouse-gas emissions (6.9 kgCO₂e/ft²) for 2024.
Where is 21 Audubon Avenue?
21 Audubon Avenue is in New York City, New York 10032. Its coordinates are 40.83944, -73.93912 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 21 Audubon Avenue and when was it built?
21 Audubon Avenue has 77,500 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1925 as its year built. It is classed as medical office.
Is 21 Audubon 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, “21 Audubon Avenue, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/21-audubon-avenue-01ea3179 (data as of October 2, 2026).