Ansonia Clockworks Condominium
Multifamily Housing in New York City, NY · 438 12th Street · 11215
At a glance
Ansonia Clockworks Condominium is a 51,023-square-foot multifamily housing building at 438 12th Street in New York City, New York, built in 1999. In its 2022 New York City benchmarking disclosure it reported an ENERGY STAR score of 87 out of 100 (grade A), a site energy-use intensity of 68.7 kBtu/ft² and 216 tCO₂e of greenhouse-gas emissions. That score is higher than 72% 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 | 87 (band A) |
| Site EUI | 68.7 kBtu/ft² |
| Source EUI | 104.8 kBtu/ft² |
| GHG emissions | 216 tCO₂e |
| GHG intensity | 4.2 kgCO₂e/ft² |
| Electricity | 279,471 kWh |
| Water use | 1,991 kgal |
| Gross floor area | 51,023 sq ft |
| Source record | nyc:4032071:2022 |
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.
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Location
- Address
- 438 12th Street
- City
- New York City
- State
- New York
- ZIP
- 11215
- Coordinates
- 40.66446, -73.98179
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Ansonia Clockworks 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. Ansonia Clockworks Condominium's ENERGY STAR score of 87 compares with an average of 63 across the 22,829 that report a score; it scores higher than 72% of them and lower than 26%. Its site EUI of 68.7 kBtu/ft² is roughly in line with 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 4.2 kgCO₂e/ft² is about 19% below the group average of 5.2 kgCO₂e/ft².
At 51,023 sq ft, it is about half of the average floor area of 100,951 sq ft for those buildings. It was built in 1999, 47 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.
What does an ENERGY STAR score of 87 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 87 means the building performs better than about 87% of its national peers. BuildingCensus bands the score into report-card grades; 87 falls in band A — high performer (85–100). 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. Ansonia Clockworks Condominium's 68.7 kBtu/ft² across 51,023 sq ft works out to about 3.5 billion Btu (1,027 MWh-equivalent) in 2022. Its source EUI of 104.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 279,471 kWh of electricity and 1,991 thousand gallons of water for the year.
Which law requires Ansonia Clockworks Condominium to report its energy use?
Ansonia Clockworks 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 2022 disclosure (source record nyc:4032071:2022). 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.
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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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Frequently asked questions
What is Ansonia Clockworks Condominium's energy grade?
Ansonia Clockworks Condominium scores 87 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2022 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Ansonia Clockworks Condominium use?
Its 2022 site energy-use intensity was 68.7 kBtu/ft² (104.8 kBtu/ft² source) across 51,023 sq ft, including 279,471 kWh of electricity.
What are Ansonia Clockworks Condominium's carbon emissions?
Ansonia Clockworks Condominium reported 216 tCO₂e of greenhouse-gas emissions (4.2 kgCO₂e/ft²) for 2022.
Where is Ansonia Clockworks Condominium?
Ansonia Clockworks Condominium is at 438 12th Street, in New York City, New York 11215. Its coordinates are 40.66446, -73.98179 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Ansonia Clockworks Condominium and when was it built?
Ansonia Clockworks Condominium has 51,023 sq ft of gross floor area, as reported in its 2022 disclosure. The disclosure lists 1999 as its year built. It is classed as multifamily housing.
Is Ansonia Clockworks Condominium 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).
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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, “Ansonia Clockworks Condominium, New York City, New York — 2022 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/ansonia-clockworks-condominium-a73f6bae (data as of October 2, 2026).