1737 Condo
Multifamily Housing in New York City, NY · 1737 E21st street · 11229
At a glance
1737 Condo is a 26,283-square-foot multifamily housing building at 1737 E21st street in New York City, New York, built in 2015. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 38.6 kBtu/ft² and 70 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 38.6 kBtu/ft² |
| Source EUI | 58.4 kBtu/ft² |
| GHG emissions | 70 tCO₂e |
| GHG intensity | 2.7 kgCO₂e/ft² |
| Electricity | 78,677 kWh |
| Natural gas | 7,452 therms |
| Gross floor area | 26,283 sq ft |
| Source record | nyc:6858809:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 38.6 kBtu/ft² | 70 tCO₂e | |
| 2023 | — | 10.2 kBtu/ft² | 29 tCO₂e | |
| 2022 | — | 11.3 kBtu/ft² | 25 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
- 1737 E21st street
- City
- New York City
- State
- New York
- ZIP
- 11229
- Coordinates
- 40.61033, -73.95242
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 1737 Condo 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. Its site EUI of 38.6 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 2.7 kgCO₂e/ft² is about half of the group average of 5.2 kgCO₂e/ft².
At 26,283 sq ft, it is about 74% below the average floor area of 100,951 sq ft for those buildings. It was built in 2015, 63 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 1737 Condo's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 1737 Condo, covering report years 2022–2024. Site EUI moved from 11.3 kBtu/ft² (2022) to 38.6 kBtu/ft² (2024), an 242% increase. Reported emissions went from 25 tCO₂e to 70 tCO₂e over the same span (up 181%).
What does a site EUI of 38.6 kBtu/ft² mean?
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. 1737 Condo's 38.6 kBtu/ft² across 26,283 sq ft works out to about 1 billion Btu (297 MWh-equivalent) in 2024. Its source EUI of 58.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 78,677 kWh of electricity and 7,452 therms of natural gas for the year.
Which law requires 1737 Condo to report its energy use?
1737 Condo 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:6858809:2024). 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
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- 405 West 118 St· 26,280 sq ft · score 24 (D)
- 4360 Furman Avenue· 26,280 sq ft · score 95 (A)
- 401 95th Street· 26,278 sq ft · score 72 (B)
- 1016 Union Street· 26,278 sq ft · score 22 (D)
- 20 Hillcrest Avenue· 26,272 sq ft · score 50 (D)
- 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 1737 Condo's energy grade?
1737 Condo did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 38.6 kBtu/ft².
How much energy does 1737 Condo use?
Its 2024 site energy-use intensity was 38.6 kBtu/ft² (58.4 kBtu/ft² source) across 26,283 sq ft, including 78,677 kWh of electricity and 7,452 therms of natural gas.
What are 1737 Condo's carbon emissions?
1737 Condo reported 70 tCO₂e of greenhouse-gas emissions (2.7 kgCO₂e/ft²) for 2024.
Where is 1737 Condo?
1737 Condo is at 1737 E21st street, in New York City, New York 11229. Its coordinates are 40.61033, -73.95242 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 1737 Condo and when was it built?
1737 Condo has 26,283 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2015 as its year built. It is classed as multifamily housing.
Is 1737 Condo 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, “1737 Condo, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/1737-condo-f094cbcb (data as of October 2, 2026).