Ladies Mile LLC
Multifamily Housing in New York City, NY · 43 West 23rd Street · 10010
At a glance
Ladies Mile LLC is a 92,285-square-foot multifamily housing building at 43 West 23rd Street in New York City, New York, built in 1903. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 30 out of 100 (grade D), a site energy-use intensity of 55.9 kBtu/ft² and 510 tCO₂e of greenhouse-gas emissions. That score is higher than 17% 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 | 30 (band D) |
| Site EUI | 55.9 kBtu/ft² |
| Source EUI | 117.0 kBtu/ft² |
| GHG emissions | 510 tCO₂e |
| GHG intensity | 5.5 kgCO₂e/ft² |
| Electricity | 914,369 kWh |
| Natural gas | 58 therms |
| Water use | 1,016 kgal |
| Gross floor area | 92,285 sq ft |
| Source record | nyc:5861145:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 30 | -2 | 55.9 kBtu/ft² | 510 tCO₂e |
| 2023 | 32 | +7 | 55.7 kBtu/ft² | 484 tCO₂e |
| 2022 | 25 | 63.2 kBtu/ft² | 467 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
- 43 West 23rd Street
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.74217, -73.99102
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Ladies Mile 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. Ladies Mile LLC's ENERGY STAR score of 30 compares with an average of 63 across the 22,829 that report a score; it scores higher than 17% of them and lower than 82%. Its site EUI of 55.9 kBtu/ft² is about 25% below 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 5.5 kgCO₂e/ft² is roughly in line with the group average of 5.2 kgCO₂e/ft².
At 92,285 sq ft, it is roughly in line with the average floor area of 100,951 sq ft for those buildings. It was built in 1903, 49 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 Ladies Mile LLC's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Ladies Mile LLC, covering report years 2022–2024. Its ENERGY STAR score went from 25 in 2022 to 30 in 2024 (+5 points); its best year on file was 2023, at 32. Site EUI moved from 63.2 kBtu/ft² (2022) to 55.9 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 467 tCO₂e to 510 tCO₂e over the same span (up 9%).
What does an ENERGY STAR score of 30 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 30 means the building performs better than about 30% of its national peers. BuildingCensus bands the score into report-card grades; 30 falls in band D — lowest band (1–54). It sits 45 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. Ladies Mile LLC's 55.9 kBtu/ft² across 92,285 sq ft works out to about 5.2 billion Btu (1,512 MWh-equivalent) in 2024. Its source EUI of 117.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 914,369 kWh of electricity, 58 therms of natural gas and 1,016 thousand gallons of water for the year.
Which law requires Ladies Mile LLC to report its energy use?
Ladies Mile 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:5861145:2024). 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
- The Arbor Eighteen Condominium (613 4th Avenue)· 92,271 sq ft · score 96 (A)
- 2705-2721 Kings Highway· 92,262 sq ft
- Halstead - 39 East 12th Street· 92,249 sq ft · score 91 (A)
- 650 West End Condominium· 92,224 sq ft · score 100 (A)
- 321 Ovington Avenue· 92,224 sq ft · score 33 (D)
- Rego Park Gardens Owners Corp (9411 60th Ave)· 92,214 sq ft · score 25 (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 Ladies Mile LLC's energy grade?
Ladies Mile LLC scores 30 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 Ladies Mile LLC use?
Its 2024 site energy-use intensity was 55.9 kBtu/ft² (117.0 kBtu/ft² source) across 92,285 sq ft, including 914,369 kWh of electricity and 58 therms of natural gas.
What are Ladies Mile LLC's carbon emissions?
Ladies Mile LLC reported 510 tCO₂e of greenhouse-gas emissions (5.5 kgCO₂e/ft²) for 2024.
Where is Ladies Mile LLC?
Ladies Mile LLC is at 43 West 23rd Street, in New York City, New York 10010. Its coordinates are 40.74217, -73.99102 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Ladies Mile LLC and when was it built?
Ladies Mile LLC has 92,285 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1903 as its year built. It is classed as multifamily housing.
Is Ladies Mile 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, “Ladies Mile LLC, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/ladies-mile-llc-ebdf6615 (data as of October 2, 2026).