233 18th St Condominium
Multifamily Housing in New York City, NY · 233 18th Street · 11215
At a glance
233 18th St Condominium is a 31,535-square-foot multifamily housing building at 233 18th Street in New York City, New York, built in 2021. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 80 out of 100 (grade B), a site energy-use intensity of 36.9 kBtu/ft² and 116 tCO₂e of greenhouse-gas emissions. That score is higher than 63% 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 | 80 (band B) |
| Site EUI | 36.9 kBtu/ft² |
| Source EUI | 87.2 kBtu/ft² |
| GHG emissions | 116 tCO₂e |
| GHG intensity | 3.7 kgCO₂e/ft² |
| Electricity | 255,850 kWh |
| Natural gas | 2,903 therms |
| Gross floor area | 31,535 sq ft |
| Source record | nyc:26000899:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 80 | -2 | 36.9 kBtu/ft² | 116 tCO₂e |
| 2023 | 82 | -8 | 36.0 kBtu/ft² | 107 tCO₂e |
| 2022 | 90 | 35.0 kBtu/ft² | 84 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
- 233 18th Street
- City
- New York City
- State
- New York
- ZIP
- 11215
- Coordinates
- 40.66316, -73.99187
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 233 18th St Condominium 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. 233 18th St Condominium's ENERGY STAR score of 80 compares with an average of 63 across the 22,829 that report a score; it scores higher than 63% of them and lower than 36%. Its site EUI of 36.9 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 3.7 kgCO₂e/ft² is about 29% below the group average of 5.2 kgCO₂e/ft².
At 31,535 sq ft, it is about 69% below the average floor area of 100,951 sq ft for those buildings. It was built in 2021, 69 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 233 18th St Condominium's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 233 18th St Condominium, covering report years 2022–2024. Its ENERGY STAR score went from 90 in 2022 to 80 in 2024 (-10 points); its best year on file was 2022, at 90. Site EUI moved from 35.0 kBtu/ft² (2022) to 36.9 kBtu/ft² (2024), an 5% increase. Reported emissions went from 84 tCO₂e to 116 tCO₂e over the same span (up 38%).
What does an ENERGY STAR score of 80 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 80 means the building performs better than about 80% of its national peers. BuildingCensus bands the score into report-card grades; 80 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. 233 18th St Condominium's 36.9 kBtu/ft² across 31,535 sq ft works out to about 1.2 billion Btu (341 MWh-equivalent) in 2024. Its source EUI of 87.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 255,850 kWh of electricity and 2,903 therms of natural gas for the year.
Which law requires 233 18th St Condominium to report its energy use?
233 18th St Condominium 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:26000899:2024). 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.
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- Multifamily Housing buildings in New York City· 33,022 benchmarked
- All New York City benchmarked buildings· Local Law 84 (LL84)
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- Least efficient large buildings in New York City
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Frequently asked questions
What is 233 18th St Condominium's energy grade?
233 18th St Condominium scores 80 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 233 18th St Condominium use?
Its 2024 site energy-use intensity was 36.9 kBtu/ft² (87.2 kBtu/ft² source) across 31,535 sq ft, including 255,850 kWh of electricity and 2,903 therms of natural gas.
What are 233 18th St Condominium's carbon emissions?
233 18th St Condominium reported 116 tCO₂e of greenhouse-gas emissions (3.7 kgCO₂e/ft²) for 2024.
Where is 233 18th St Condominium?
233 18th St Condominium is at 233 18th Street, in New York City, New York 11215. Its coordinates are 40.66316, -73.99187 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 233 18th St Condominium and when was it built?
233 18th St Condominium has 31,535 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2021 as its year built. It is classed as multifamily housing.
Is 233 18th St Condominium 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, “233 18th St Condominium, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/233-18th-st-condominium-3dbe35d3 (data as of October 2, 2026).