12 WEST 21 STREET - [12 West 21st Street]
Office in New York City, NY · 12 West 21st St. · 10010
At a glance
12 WEST 21 STREET - [12 West 21st Street] is a 58,901-square-foot office building at 12 West 21st St. in New York City, New York, built in 1920. 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 67.3 kBtu/ft² and 378 tCO₂e of greenhouse-gas emissions. That score is higher than 38% of the 2,519 scored 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 | 67.3 kBtu/ft² |
| Source EUI | 130.9 kBtu/ft² |
| GHG emissions | 378 tCO₂e |
| GHG intensity | 6.4 kgCO₂e/ft² |
| Electricity | 606,115 kWh |
| Natural gas | 1,441 therms |
| Water use | 724 kgal |
| Gross floor area | 58,901 sq ft |
| Source record | nyc:2811070:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 72 | +4 | 67.3 kBtu/ft² | 378 tCO₂e |
| 2023 | 68 | -10 | 79.0 kBtu/ft² | 413 tCO₂e |
| 2022 | 78 | 63.1 kBtu/ft² | 296 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
- 12 West 21st St.
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.74056, -73.99124
Within ~1 km
Nearby benchmarked buildings
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- 11 Madison Avenuescore 77
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- 51 Madisonscore 79
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- One Madison Avenuescore —
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- ConEd Irving Placescore 55
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See also: most efficient in New York City · biggest emitters
How does 12 WEST 21 STREET - [12 West 21st Street] compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. 12 WEST 21 STREET - [12 West 21st Street]'s ENERGY STAR score of 72 compares with an average of 72 across the 2,519 that report a score; it scores higher than 38% of them and lower than 61%. Its site EUI of 67.3 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft². Its emissions intensity of 6.4 kgCO₂e/ft² is about 11% above the group average of 5.8 kgCO₂e/ft².
At 58,901 sq ft, it is about 71% below the average floor area of 205,440 sq ft for those buildings. It was built in 1920, 20 years earlier than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has 12 WEST 21 STREET - [12 West 21st Street]'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 12 WEST 21 STREET - [12 West 21st Street], covering report years 2022–2024. Its ENERGY STAR score went from 78 in 2022 to 72 in 2024 (-6 points); its best year on file was 2022, at 78. Site EUI moved from 63.1 kBtu/ft² (2022) to 67.3 kBtu/ft² (2024), an 7% increase. Reported emissions went from 296 tCO₂e to 378 tCO₂e over the same span (up 27%).
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. 12 WEST 21 STREET - [12 West 21st Street]'s 67.3 kBtu/ft² across 58,901 sq ft works out to about 4 billion Btu (1,162 MWh-equivalent) in 2024. Its source EUI of 130.9 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 606,115 kWh of electricity, 1,441 therms of natural gas and 724 thousand gallons of water for the year.
Which law requires 12 WEST 21 STREET - [12 West 21st Street] to report its energy use?
12 WEST 21 STREET - [12 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:2811070:2024). 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 office buildings in New York City
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- Office buildings in New York City· 3,384 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 12 WEST 21 STREET - [12 West 21st Street]'s energy grade?
12 WEST 21 STREET - [12 West 21st Street] 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 12 WEST 21 STREET - [12 West 21st Street] use?
Its 2024 site energy-use intensity was 67.3 kBtu/ft² (130.9 kBtu/ft² source) across 58,901 sq ft, including 606,115 kWh of electricity and 1,441 therms of natural gas.
What are 12 WEST 21 STREET - [12 West 21st Street]'s carbon emissions?
12 WEST 21 STREET - [12 West 21st Street] reported 378 tCO₂e of greenhouse-gas emissions (6.4 kgCO₂e/ft²) for 2024.
Where is 12 WEST 21 STREET - [12 West 21st Street]?
12 WEST 21 STREET - [12 West 21st Street] is at 12 West 21st St., in New York City, New York 10010. Its coordinates are 40.74056, -73.99124 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 12 WEST 21 STREET - [12 West 21st Street] and when was it built?
12 WEST 21 STREET - [12 West 21st Street] has 58,901 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1920 as its year built. It is classed as office.
Is 12 WEST 21 STREET - [12 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, “12 WEST 21 STREET - [12 West 21st Street], New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/12-west-21-street-12-west-21st-street-eb8027a8 (data as of October 2, 2026).