30 West 21st St
Office in New York City, NY · 10010
At a glance
30 West 21st St is a 60,798-square-foot office building in New York City, New York, built in 1907. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 75 out of 100 (grade B), a site energy-use intensity of 47.1 kBtu/ft² and 280 tCO₂e of greenhouse-gas emissions. That score is higher than 42% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 75 (band B) |
| Site EUI | 47.1 kBtu/ft² |
| Source EUI | 105.3 kBtu/ft² |
| GHG emissions | 280 tCO₂e |
| GHG intensity | 4.6 kgCO₂e/ft² |
| Electricity | 575,089 kWh |
| Natural gas | 27 therms |
| Water use | 724 kgal |
| Gross floor area | 60,798 sq ft |
| Source record | nyc:18966747:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 75 | +4 | 47.1 kBtu/ft² | 280 tCO₂e |
| 2022 | 71 | 57.2 kBtu/ft² | 278 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
- 30 West 21st St
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.74074, -73.99166
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 30 West 21st St 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. 30 West 21st St's ENERGY STAR score of 75 compares with an average of 72 across the 2,519 that report a score; it scores higher than 42% of them and lower than 56%. Its site EUI of 47.1 kBtu/ft² is about 27% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.6 kgCO₂e/ft² is about 21% below the group average of 5.8 kgCO₂e/ft².
At 60,798 sq ft, it is about 70% below the average floor area of 205,440 sq ft for those buildings. It was built in 1907, 33 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 30 West 21st St's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 30 West 21st St, covering report years 2022–2023. Its ENERGY STAR score went from 71 in 2022 to 75 in 2023 (+4 points). Site EUI moved from 57.2 kBtu/ft² (2022) to 47.1 kBtu/ft² (2023), a 18% decrease. Reported emissions went from 278 tCO₂e to 280 tCO₂e over the same span (up 1%).
What does an ENERGY STAR score of 75 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 75 means the building performs better than about 75% of its national peers. BuildingCensus bands the score into report-card grades; 75 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. 30 West 21st St's 47.1 kBtu/ft² across 60,798 sq ft works out to about 2.9 billion Btu (839 MWh-equivalent) in 2023. Its source EUI of 105.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 575,089 kWh of electricity, 27 therms of natural gas and 724 thousand gallons of water for the year.
Which law requires 30 West 21st St to report its energy use?
30 West 21st St 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:18966747:2023). 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 office buildings in New York City
- 57 Worth Street· 60,610 sq ft · score 58 (C)
- 1 West 34th Street· 60,564 sq ft · score 72 (B)
- 15 West 38th Street (Lord & Taylor)· 60,449 sq ft
- Jay Suites Fifth Ave· 60,449 sq ft · EUI 53.6 kBtu/ft²
- 475 Euclid Avenue· 60,180 sq ft · score 42 (D)
- 475 Euclid Avenue (Parent Property)· 60,180 sq ft · EUI 66.7 kBtu/ft²
- 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 30 West 21st St's energy grade?
30 West 21st St scores 75 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 30 West 21st St use?
Its 2023 site energy-use intensity was 47.1 kBtu/ft² (105.3 kBtu/ft² source) across 60,798 sq ft, including 575,089 kWh of electricity and 27 therms of natural gas.
What are 30 West 21st St's carbon emissions?
30 West 21st St reported 280 tCO₂e of greenhouse-gas emissions (4.6 kgCO₂e/ft²) for 2023.
Where is 30 West 21st St?
30 West 21st St is in New York City, New York 10010. Its coordinates are 40.74074, -73.99166 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 30 West 21st St and when was it built?
30 West 21st St has 60,798 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1907 as its year built. It is classed as office.
Is 30 West 21st St 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, “30 West 21st St, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/30-west-21st-st-c0cc6923 (data as of October 2, 2026).