KM - 225 West 123rd St
Multifamily Housing in New York City, NY · 225 West 123rd St · 10027
At a glance
KM - 225 West 123rd St is a 98,955-square-foot multifamily housing building in New York City, New York, built in 2012. In its 2023 New York City benchmarking disclosure it reported an ENERGY STAR score of 1 out of 100 (grade D), a site energy-use intensity of 148.4 kBtu/ft² and 879 tCO₂e of greenhouse-gas emissions. That score is higher than 0% of the 22,829 scored multifamily housing buildings in New York City.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 1 (band D) |
| Site EUI | 148.4 kBtu/ft² |
| Source EUI | 187.4 kBtu/ft² |
| GHG emissions | 879 tCO₂e |
| GHG intensity | 8.9 kgCO₂e/ft² |
| Electricity | 523,977 kWh |
| Natural gas | 128,971 therms |
| Gross floor area | 98,955 sq ft |
| Source record | nyc:15746285:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | 1 | ±0 | 148.4 kBtu/ft² | 879 tCO₂e |
| 2022 | 1 | 153.1 kBtu/ft² | 862 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
- 225 West 123rd St
- City
- New York City
- State
- New York
- ZIP
- 10027
- Coordinates
- 40.80808, -73.95024
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does KM - 225 West 123rd St 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. KM - 225 West 123rd St's ENERGY STAR score of 1 compares with an average of 63 across the 22,829 that report a score; it scores higher than 0% of them and lower than 97%. Its site EUI of 148.4 kBtu/ft² is about twice 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 8.9 kgCO₂e/ft² is about 71% above the group average of 5.2 kgCO₂e/ft².
At 98,955 sq ft, it is roughly in line with the average floor area of 100,951 sq ft for those buildings. It was built in 2012, 60 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 KM - 225 West 123rd St's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for KM - 225 West 123rd St, covering report years 2022–2023. Its ENERGY STAR score was 1 in both 2022 and 2023. Site EUI moved from 153.1 kBtu/ft² (2022) to 148.4 kBtu/ft² (2023), a 3% decrease. Reported emissions went from 862 tCO₂e to 879 tCO₂e over the same span (up 2%).
What does an ENERGY STAR score of 1 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: 1 is the bottom of the scale. BuildingCensus bands the score into report-card grades; 1 falls in band D — lowest band (1–54). It sits 74 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. KM - 225 West 123rd St's 148.4 kBtu/ft² across 98,955 sq ft works out to about 14.7 billion Btu (4,304 MWh-equivalent) in 2023. Its source EUI of 187.4 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 523,977 kWh of electricity and 128,971 therms of natural gas for the year.
Which law requires KM - 225 West 123rd St to report its energy use?
KM - 225 West 123rd St 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 2023 disclosure (source record nyc:15746285:2023). 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
- (3780) - 780 West End Avenue Condominium (780 West End Avenue)· 98,950 sq ft · score 83 (B)
- 2427 Webster Realty LLC· 98,922 sq ft · score 33 (D)
- 735 AVENUE W.· 98,900 sq ft · score 84 (B)
- Andrews: 157 Chambers St.· 98,887 sq ft · EUI 68.4 kBtu/ft²
- 927 Fifth Ave· 98,881 sq ft · EUI 57.1 kBtu/ft²
- Netherland Gardens Corp. (5640 Netherland Ave)· 98,880 sq ft
- 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 KM - 225 West 123rd St's energy grade?
KM - 225 West 123rd St scores 1 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2023 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does KM - 225 West 123rd St use?
Its 2023 site energy-use intensity was 148.4 kBtu/ft² (187.4 kBtu/ft² source) across 98,955 sq ft, including 523,977 kWh of electricity and 128,971 therms of natural gas.
What are KM - 225 West 123rd St's carbon emissions?
KM - 225 West 123rd St reported 879 tCO₂e of greenhouse-gas emissions (8.9 kgCO₂e/ft²) for 2023.
Where is KM - 225 West 123rd St?
KM - 225 West 123rd St is in New York City, New York 10027. Its coordinates are 40.80808, -73.95024 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is KM - 225 West 123rd St and when was it built?
KM - 225 West 123rd St has 98,955 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 2012 as its year built. It is classed as multifamily housing.
Is KM - 225 West 123rd St covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “KM - 225 West 123rd St, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/km-225-west-123rd-st-8d67de5a (data as of October 2, 2026).