Langham Mansions
Multifamily Housing in New York City, NY · 135 Central Park West · 10023
At a glance
Langham Mansions is a 217,281-square-foot multifamily housing building at 135 Central Park West in New York City, New York, built in 1954. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 96 out of 100 (grade A), a site energy-use intensity of 55.2 kBtu/ft² and 863 tCO₂e of greenhouse-gas emissions. That score is higher than 84% 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 | 96 (band A) |
| Site EUI | 55.2 kBtu/ft² |
| Source EUI | 87.3 kBtu/ft² |
| GHG emissions | 863 tCO₂e |
| GHG intensity | 4.0 kgCO₂e/ft² |
| Electricity | 1,068,134 kWh |
| Natural gas | 83,451 therms |
| Water use | 157 kgal |
| Gross floor area | 217,281 sq ft |
| Source record | nyc:2649549:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 96 | +1 | 55.2 kBtu/ft² | 863 tCO₂e |
| 2023 | 95 | +2 | 54.1 kBtu/ft² | 835 tCO₂e |
| 2022 | 93 | 62.5 kBtu/ft² | 848 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
- 135 Central Park West
- City
- New York City
- State
- New York
- ZIP
- 10023
- Coordinates
- 40.77722, -73.97524
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Langham Mansions 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. Langham Mansions's ENERGY STAR score of 96 compares with an average of 63 across the 22,829 that report a score; it scores higher than 84% of them and lower than 14%. Its site EUI of 55.2 kBtu/ft² is about 26% 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 4.0 kgCO₂e/ft² is about 24% below the group average of 5.2 kgCO₂e/ft².
At 217,281 sq ft, it is about twice the average floor area of 100,951 sq ft for those buildings. Its 1954 construction date is close to 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 Langham Mansions's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Langham Mansions, covering report years 2022–2024. Its ENERGY STAR score went from 93 in 2022 to 96 in 2024 (+3 points). Site EUI moved from 62.5 kBtu/ft² (2022) to 55.2 kBtu/ft² (2024), a 12% decrease. Reported emissions went from 848 tCO₂e to 863 tCO₂e over the same span (up 2%).
What does an ENERGY STAR score of 96 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 96 means the building performs better than about 96% of its national peers. BuildingCensus bands the score into report-card grades; 96 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. Langham Mansions's 55.2 kBtu/ft² across 217,281 sq ft works out to about 12 billion Btu (3,515 MWh-equivalent) in 2024. Its source EUI of 87.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,068,134 kWh of electricity, 83,451 therms of natural gas and 157 thousand gallons of water for the year.
Which law requires Langham Mansions to report its energy use?
Langham Mansions 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:2649549:2024). 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
- (4093) - 2 Sutton Place SO Tenant (2 Sutton Place South)· 217,275 sq ft · score 54 (D)
- 1 Beekman Pl· 217,175 sq ft · score 39 (D)
- ELH - 2960 W 29th St· 217,140 sq ft · score 99 (A)
- The Beaumont Condominium (30 W. 61 St)· 217,109 sq ft · score 61 (C)
- DEPM 1586 - 1010 Fifth Ave· 217,040 sq ft · score 71 (B)
- Central Queens - 40-45 Elbertson St/89-21 Elmhurst Ave· 217,000 sq ft · score 100 (A)
- 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 Langham Mansions's energy grade?
Langham Mansions scores 96 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does Langham Mansions use?
Its 2024 site energy-use intensity was 55.2 kBtu/ft² (87.3 kBtu/ft² source) across 217,281 sq ft, including 1,068,134 kWh of electricity and 83,451 therms of natural gas.
What are Langham Mansions's carbon emissions?
Langham Mansions reported 863 tCO₂e of greenhouse-gas emissions (4.0 kgCO₂e/ft²) for 2024.
Where is Langham Mansions?
Langham Mansions is at 135 Central Park West, in New York City, New York 10023. Its coordinates are 40.77722, -73.97524 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Langham Mansions and when was it built?
Langham Mansions has 217,281 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1954 as its year built. It is classed as multifamily housing.
Is Langham Mansions 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, “Langham Mansions, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/langham-mansions-730d2886 (data as of October 2, 2026).