SIMA ASSOCIATES LLC
Multifamily Housing in New York City, NY · 645 EAST 231ST STREET · 10466
At a glance
SIMA ASSOCIATES LLC is a 67,224-square-foot multifamily housing building at 645 EAST 231ST STREET in New York City, New York, built in 1941. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 22 out of 100 (grade D), a site energy-use intensity of 106.6 kBtu/ft² and 560 tCO₂e of greenhouse-gas emissions. That score is higher than 13% 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 | 22 (band D) |
| Site EUI | 106.6 kBtu/ft² |
| Source EUI | 127.1 kBtu/ft² |
| GHG emissions | 560 tCO₂e |
| GHG intensity | 8.3 kgCO₂e/ft² |
| Electricity | 211,979 kWh |
| Natural gas | 3,775 therms |
| Water use | 4,094 kgal |
| Gross floor area | 67,224 sq ft |
| Source record | nyc:21291423:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 22 | +20 | 106.6 kBtu/ft² | 560 tCO₂e |
| 2023 | 2 | -8 | 131.4 kBtu/ft² | 705 tCO₂e |
| 2022 | 10 | 132.4 kBtu/ft² | 665 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
- 645 EAST 231ST STREET
- City
- New York City
- State
- New York
- ZIP
- 10466
- Coordinates
- 40.89262, -73.85991
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does SIMA ASSOCIATES LLC 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. SIMA ASSOCIATES LLC's ENERGY STAR score of 22 compares with an average of 63 across the 22,829 that report a score; it scores higher than 13% of them and lower than 87%. Its site EUI of 106.6 kBtu/ft² is about 42% 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 8.3 kgCO₂e/ft² is about 60% above the group average of 5.2 kgCO₂e/ft².
At 67,224 sq ft, it is about 33% below the average floor area of 100,951 sq ft for those buildings. It was built in 1941, 11 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 SIMA ASSOCIATES LLC's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for SIMA ASSOCIATES LLC, covering report years 2022–2024. Its ENERGY STAR score went from 10 in 2022 to 22 in 2024 (+12 points). Site EUI moved from 132.4 kBtu/ft² (2022) to 106.6 kBtu/ft² (2024), a 19% decrease. Reported emissions went from 665 tCO₂e to 560 tCO₂e over the same span (down 16%).
What does an ENERGY STAR score of 22 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 22 means the building performs better than about 22% of its national peers. BuildingCensus bands the score into report-card grades; 22 falls in band D — lowest band (1–54). It sits 53 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. SIMA ASSOCIATES LLC's 106.6 kBtu/ft² across 67,224 sq ft works out to about 7.2 billion Btu (2,100 MWh-equivalent) in 2024. Its source EUI of 127.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 211,979 kWh of electricity, 3,775 therms of natural gas and 4,094 thousand gallons of water for the year.
Which law requires SIMA ASSOCIATES LLC to report its energy use?
SIMA ASSOCIATES LLC 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:21291423:2024). 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
- 611 West 239th Street· 67,208 sq ft · score 64 (C)
- 65-41 Booth Street· 67,200 sq ft · score 85 (A)
- DEPM 2056 - 1-5 Bond Street· 67,200 sq ft · EUI 59.6 kBtu/ft²
- Buchbinder: 160 W 16th St· 67,200 sq ft · EUI 14.8 kBtu/ft²
- Bay Terrace Coop 3 - 4058570110· 67,200 sq ft · score 8 (D)
- 1245 Realty Enterprise· 67,200 sq ft · score 68 (C)
- 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 SIMA ASSOCIATES LLC's energy grade?
SIMA ASSOCIATES LLC scores 22 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 SIMA ASSOCIATES LLC use?
Its 2024 site energy-use intensity was 106.6 kBtu/ft² (127.1 kBtu/ft² source) across 67,224 sq ft, including 211,979 kWh of electricity and 3,775 therms of natural gas.
What are SIMA ASSOCIATES LLC's carbon emissions?
SIMA ASSOCIATES LLC reported 560 tCO₂e of greenhouse-gas emissions (8.3 kgCO₂e/ft²) for 2024.
Where is SIMA ASSOCIATES LLC?
SIMA ASSOCIATES LLC is at 645 EAST 231ST STREET, in New York City, New York 10466. Its coordinates are 40.89262, -73.85991 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is SIMA ASSOCIATES LLC and when was it built?
SIMA ASSOCIATES LLC has 67,224 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1941 as its year built. It is classed as multifamily housing.
Is SIMA ASSOCIATES LLC 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, “SIMA ASSOCIATES LLC, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/sima-associates-llc-d25804d3 (data as of October 2, 2026).