The Cosmopolitan Condominium (145 East 48th Street)
Multifamily Housing in New York City, NY · 145 East 48th Street · 10017
At a glance
The Cosmopolitan Condominium (145 East 48th Street) is a 201,068-square-foot multifamily housing building in New York City, New York, built in 1985. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 19 out of 100 (grade D), a site energy-use intensity of 87.7 kBtu/ft² and 1,429 tCO₂e of greenhouse-gas emissions. That score is higher than 11% 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 | 19 (band D) |
| Site EUI | 87.7 kBtu/ft² |
| Source EUI | 150.3 kBtu/ft² |
| GHG emissions | 1,429 tCO₂e |
| GHG intensity | 7.1 kgCO₂e/ft² |
| Electricity | 1,708,131 kWh |
| Natural gas | 19,124 therms |
| Gross floor area | 201,068 sq ft |
| Source record | nyc:20239645:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 19 | +7 | 87.7 kBtu/ft² | 1,429 tCO₂e |
| 2023 | 12 | +2 | 96.0 kBtu/ft² | 1,537 tCO₂e |
| 2022 | 10 | 105.9 kBtu/ft² | 1,539 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
- 145 East 48th Street
- City
- New York City
- State
- New York
- ZIP
- 10017
- Coordinates
- 40.75504, -73.97277
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does The Cosmopolitan Condominium (145 East 48th Street) 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. The Cosmopolitan Condominium (145 East 48th Street)'s ENERGY STAR score of 19 compares with an average of 63 across the 22,829 that report a score; it scores higher than 11% of them and lower than 88%. Its site EUI of 87.7 kBtu/ft² is about 17% 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 7.1 kgCO₂e/ft² is about 37% above the group average of 5.2 kgCO₂e/ft².
At 201,068 sq ft, it is about twice the average floor area of 100,951 sq ft for those buildings. It was built in 1985, 33 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 The Cosmopolitan Condominium (145 East 48th Street)'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for The Cosmopolitan Condominium (145 East 48th Street), covering report years 2022–2024. Its ENERGY STAR score went from 10 in 2022 to 19 in 2024 (+9 points). Site EUI moved from 105.9 kBtu/ft² (2022) to 87.7 kBtu/ft² (2024), a 17% decrease. Reported emissions went from 1,539 tCO₂e to 1,429 tCO₂e over the same span (down 7%).
What does an ENERGY STAR score of 19 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 19 means the building performs better than about 19% of its national peers. BuildingCensus bands the score into report-card grades; 19 falls in band D — lowest band (1–54). It sits 56 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. The Cosmopolitan Condominium (145 East 48th Street)'s 87.7 kBtu/ft² across 201,068 sq ft works out to about 17.6 billion Btu (5,168 MWh-equivalent) in 2024. Its source EUI of 150.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,708,131 kWh of electricity and 19,124 therms of natural gas for the year.
Which law requires The Cosmopolitan Condominium (145 East 48th Street) to report its energy use?
The Cosmopolitan Condominium (145 East 48th Street) 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:20239645:2024). 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
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- The Gotham Condominium (170 East 87th Street)· 201,008 sq ft
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- 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 The Cosmopolitan Condominium (145 East 48th Street)'s energy grade?
The Cosmopolitan Condominium (145 East 48th Street) scores 19 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 The Cosmopolitan Condominium (145 East 48th Street) use?
Its 2024 site energy-use intensity was 87.7 kBtu/ft² (150.3 kBtu/ft² source) across 201,068 sq ft, including 1,708,131 kWh of electricity and 19,124 therms of natural gas.
What are The Cosmopolitan Condominium (145 East 48th Street)'s carbon emissions?
The Cosmopolitan Condominium (145 East 48th Street) reported 1,429 tCO₂e of greenhouse-gas emissions (7.1 kgCO₂e/ft²) for 2024.
Where is The Cosmopolitan Condominium (145 East 48th Street)?
The Cosmopolitan Condominium (145 East 48th Street) is in New York City, New York 10017. Its coordinates are 40.75504, -73.97277 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is The Cosmopolitan Condominium (145 East 48th Street) and when was it built?
The Cosmopolitan Condominium (145 East 48th Street) has 201,068 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1985 as its year built. It is classed as multifamily housing.
Is The Cosmopolitan Condominium (145 East 48th Street) 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, “The Cosmopolitan Condominium (145 East 48th Street), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/the-cosmopolitan-condominium-145-east-48th-street-d1872c8d (data as of October 2, 2026).