AKAM - 151 West 21st Street
Multifamily Housing in New York City, NY · 151 West 21st Street · 10011
At a glance
AKAM - 151 West 21st Street is a 71,842-square-foot multifamily housing building in New York City, New York, built in 2012. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 73 out of 100 (grade B), a site energy-use intensity of 40.8 kBtu/ft² and 274 tCO₂e of greenhouse-gas emissions. That score is higher than 54% 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 | 73 (band B) |
| Site EUI | 40.8 kBtu/ft² |
| Source EUI | 89.5 kBtu/ft² |
| GHG emissions | 274 tCO₂e |
| GHG intensity | 3.8 kgCO₂e/ft² |
| Electricity | 562,157 kWh |
| Natural gas | 10,098 therms |
| Water use | 1,221 kgal |
| Gross floor area | 71,842 sq ft |
| Source record | nyc:4952798:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 73 | +24 | 40.8 kBtu/ft² | 274 tCO₂e |
| 2023 | 49 | +3 | 51.8 kBtu/ft² | 260 tCO₂e |
| 2022 | 46 | 57.0 kBtu/ft² | 235 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
- 151 West 21st Street
- City
- New York City
- State
- New York
- ZIP
- 10011
- Coordinates
- 40.74223, -73.99518
Within ~1 km
Nearby benchmarked buildings
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- 11 Madison Avenuescore 77
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- One Madison Avenuescore —
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- Benchmarking Group - 3score —
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- PENN 11score 78
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See also: most efficient in New York City · biggest emitters
How does AKAM - 151 West 21st 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. AKAM - 151 West 21st Street's ENERGY STAR score of 73 compares with an average of 63 across the 22,829 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 40.8 kBtu/ft² is about half of 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 3.8 kgCO₂e/ft² is about 27% below the group average of 5.2 kgCO₂e/ft².
At 71,842 sq ft, it is about 29% below the average floor area of 100,951 sq ft for those buildings. It was built in 2012, 60 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 AKAM - 151 West 21st Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for AKAM - 151 West 21st Street, covering report years 2022–2024. Its ENERGY STAR score went from 46 in 2022 to 73 in 2024 (+27 points). Site EUI moved from 57.0 kBtu/ft² (2022) to 40.8 kBtu/ft² (2024), a 28% decrease. Reported emissions went from 235 tCO₂e to 274 tCO₂e over the same span (up 17%).
What does an ENERGY STAR score of 73 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 73 means the building performs better than about 73% of its national peers. BuildingCensus bands the score into report-card grades; 73 falls in band B — above median (70–84). It sits 2 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. AKAM - 151 West 21st Street's 40.8 kBtu/ft² across 71,842 sq ft works out to about 2.9 billion Btu (859 MWh-equivalent) in 2024. Its source EUI of 89.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 562,157 kWh of electricity, 10,098 therms of natural gas and 1,221 thousand gallons of water for the year.
Which law requires AKAM - 151 West 21st Street to report its energy use?
AKAM - 151 West 21st 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 2024 disclosure (source record nyc:4952798:2024). 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
- 1265 Walton Avenue· 71,840 sq ft · score 83 (B)
- ZARA - 88-05 Merrick Blvd· 71,826 sq ft · score 41 (D)
- 470 Stratford Road· 71,811 sq ft · score 91 (A)
- 1050 Anderson Avenue· 71,803 sq ft
- 1038 Anderson Avenue· 71,803 sq ft
- 526/530 West 113 St Shared Boiler· 71,784 sq ft · score 79 (B)
- 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 AKAM - 151 West 21st Street's energy grade?
AKAM - 151 West 21st Street scores 73 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 AKAM - 151 West 21st Street use?
Its 2024 site energy-use intensity was 40.8 kBtu/ft² (89.5 kBtu/ft² source) across 71,842 sq ft, including 562,157 kWh of electricity and 10,098 therms of natural gas.
What are AKAM - 151 West 21st Street's carbon emissions?
AKAM - 151 West 21st Street reported 274 tCO₂e of greenhouse-gas emissions (3.8 kgCO₂e/ft²) for 2024.
Where is AKAM - 151 West 21st Street?
AKAM - 151 West 21st Street is in New York City, New York 10011. Its coordinates are 40.74223, -73.99518 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is AKAM - 151 West 21st Street and when was it built?
AKAM - 151 West 21st Street has 71,842 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2012 as its year built. It is classed as multifamily housing.
Is AKAM - 151 West 21st Street 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, “AKAM - 151 West 21st Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/akam-151-west-21st-street-2dadb2fa (data as of October 2, 2026).