55 East 21st Street
Multifamily Housing in New York City, NY · 11226
At a glance
55 East 21st Street is a 60,114-square-foot multifamily housing building in New York City, New York, built in 1935. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 21 out of 100 (grade D), a site energy-use intensity of 117.6 kBtu/ft² and 418 tCO₂e of greenhouse-gas emissions. That score is higher than 12% 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 | 21 (band D) |
| Site EUI | 117.6 kBtu/ft² |
| Source EUI | 143.6 kBtu/ft² |
| GHG emissions | 418 tCO₂e |
| GHG intensity | 7.0 kgCO₂e/ft² |
| Electricity | 202,502 kWh |
| Natural gas | 63,783 therms |
| Gross floor area | 60,114 sq ft |
| Source record | nyc:11990922:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 21 | -2 | 117.6 kBtu/ft² | 418 tCO₂e |
| 2023 | 23 | +9 | 113.0 kBtu/ft² | 399 tCO₂e |
| 2022 | 14 | 134.9 kBtu/ft² | 452 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
- 55 East 21st Street
- City
- New York City
- State
- New York
- ZIP
- 11226
- Coordinates
- 40.65320, -73.96053
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 55 East 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. 55 East 21st Street's ENERGY STAR score of 21 compares with an average of 63 across the 22,829 that report a score; it scores higher than 12% of them and lower than 87%. Its site EUI of 117.6 kBtu/ft² is about 57% 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 7.0 kgCO₂e/ft² is about 34% above the group average of 5.2 kgCO₂e/ft².
At 60,114 sq ft, it is about 40% below the average floor area of 100,951 sq ft for those buildings. It was built in 1935, 17 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 55 East 21st Street's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 55 East 21st Street, covering report years 2022–2024. Its ENERGY STAR score went from 14 in 2022 to 21 in 2024 (+7 points); its best year on file was 2023, at 23. Site EUI moved from 134.9 kBtu/ft² (2022) to 117.6 kBtu/ft² (2024), a 13% decrease. Reported emissions went from 452 tCO₂e to 418 tCO₂e over the same span (down 7%).
What does an ENERGY STAR score of 21 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 21 means the building performs better than about 21% of its national peers. BuildingCensus bands the score into report-card grades; 21 falls in band D — lowest band (1–54). It sits 54 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. 55 East 21st Street's 117.6 kBtu/ft² across 60,114 sq ft works out to about 7.1 billion Btu (2,072 MWh-equivalent) in 2024. Its source EUI of 143.6 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 202,502 kWh of electricity and 63,783 therms of natural gas for the year.
Which law requires 55 East 21st Street to report its energy use?
55 East 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:11990922:2024). 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
- 1220 Morris Avenue· 60,111 sq ft · score 69 (C)
- Tenere: 75-05 113th Street· 60,106 sq ft · score 73 (B)
- Lynda Simmons Homes-1591 Fulton Avenue· 60,105 sq ft · score 89 (A)
- Redfern Bldg 7· 60,100 sq ft · EUI 4.3 kBtu/ft²
- Redfern 1260 GNRTR· 60,100 sq ft · EUI 0.4 kBtu/ft²
- Orsid - 68 East 86th Street· 60,098 sq ft · EUI 62.6 kBtu/ft²
- 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 55 East 21st Street's energy grade?
55 East 21st Street scores 21 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 55 East 21st Street use?
Its 2024 site energy-use intensity was 117.6 kBtu/ft² (143.6 kBtu/ft² source) across 60,114 sq ft, including 202,502 kWh of electricity and 63,783 therms of natural gas.
What are 55 East 21st Street's carbon emissions?
55 East 21st Street reported 418 tCO₂e of greenhouse-gas emissions (7.0 kgCO₂e/ft²) for 2024.
Where is 55 East 21st Street?
55 East 21st Street is in New York City, New York 11226. Its coordinates are 40.65320, -73.96053 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 55 East 21st Street and when was it built?
55 East 21st Street has 60,114 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1935 as its year built. It is classed as multifamily housing.
Is 55 East 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, “55 East 21st Street, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/55-east-21st-street-bfe16106 (data as of October 2, 2026).