21 East 21st Street
Multifamily Housing in New York City, NY · 11226
At a glance
21 East 21st Street is a 41,952-square-foot multifamily housing building in New York City, New York, built in 1938. In its 2022 New York City benchmarking disclosure it reported an ENERGY STAR score of 40 out of 100 (grade D), a site energy-use intensity of 110.6 kBtu/ft² and 265 tCO₂e of greenhouse-gas emissions. That score is higher than 24% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2022
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 40 (band D) |
| Site EUI | 110.6 kBtu/ft² |
| Source EUI | 140.3 kBtu/ft² |
| GHG emissions | 265 tCO₂e |
| GHG intensity | 6.3 kgCO₂e/ft² |
| Electricity | 169,904 kWh |
| Water use | 7,261 kgal |
| Gross floor area | 41,952 sq ft |
| Source record | nyc:6199914:2022 |
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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 21 East 21st Street
- City
- New York City
- State
- New York
- ZIP
- 11226
- Coordinates
- 40.65381, -73.96065
Within ~1 km
Nearby benchmarked buildings
Multifamily Housing · 3,117,085 sq ft
K-12 School · 460,800 sq ft
- TMG - 123 Linden - PLGscore 34
Multifamily Housing · 403,116 sq ft
- Benjamin Baum: 590 Flatbush Avescore 67
Multifamily Housing · 346,072 sq ft
- 800 Flatbush Avenuescore 85
Multifamily Housing · 281,008 sq ft
- Benjamin Baum: 580 Flatbush Avescore 61
Multifamily Housing · 257,076 sq ft
See also: most efficient in New York City · biggest emitters
How does 21 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. 21 East 21st Street's ENERGY STAR score of 40 compares with an average of 63 across the 22,829 that report a score; it scores higher than 24% of them and lower than 75%. Its site EUI of 110.6 kBtu/ft² is about 48% 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 6.3 kgCO₂e/ft² is about 21% above the group average of 5.2 kgCO₂e/ft².
At 41,952 sq ft, it is about 58% below the average floor area of 100,951 sq ft for those buildings. It was built in 1938, 14 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.
What does an ENERGY STAR score of 40 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 40 means the building performs better than about 40% of its national peers. BuildingCensus bands the score into report-card grades; 40 falls in band D — lowest band (1–54). It sits 35 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 East 21st Street's 110.6 kBtu/ft² across 41,952 sq ft works out to about 4.6 billion Btu (1,360 MWh-equivalent) in 2022. Its source EUI of 140.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 169,904 kWh of electricity and 7,261 thousand gallons of water for the year.
Which law requires 21 East 21st Street to report its energy use?
21 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 2022 disclosure (source record nyc:6199914:2022). 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
- Daisy Management : 109 Greene Street· 41,951 sq ft · EUI 69.5 kBtu/ft²
- 1700 Bryant Avenue· 41,950 sq ft · score 100 (A)
- Wavecrest - 1700 Bryant Avenue· 41,950 sq ft · score 100 (A)
- 918 Morris Avenue· 41,940 sq ft · score 89 (A)
- 918 Morris Avenue· 41,940 sq ft · score 100 (A)
- Chestnut - 325 West 77th Street· 41,931 sq ft · score 90 (A)
- 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 21 East 21st Street's energy grade?
21 East 21st Street scores 40 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2022 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 21 East 21st Street use?
Its 2022 site energy-use intensity was 110.6 kBtu/ft² (140.3 kBtu/ft² source) across 41,952 sq ft, including 169,904 kWh of electricity.
What are 21 East 21st Street's carbon emissions?
21 East 21st Street reported 265 tCO₂e of greenhouse-gas emissions (6.3 kgCO₂e/ft²) for 2022.
Where is 21 East 21st Street?
21 East 21st Street is in New York City, New York 11226. Its coordinates are 40.65381, -73.96065 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 21 East 21st Street and when was it built?
21 East 21st Street has 41,952 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1938 as its year built. It is classed as multifamily housing.
Is 21 East 21st Street covered by Local Law 84 (LL84)?
Yes — it appears in the 2022 Energy and Water Data Disclosure disclosure, which lists the buildings reporting under Local Law 84 (LL84).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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 East 21st Street, New York City, New York — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/21-east-21st-street-e47e514d (data as of October 2, 2026).