Carlyle I, II, III
Residence Hall/Dormitory in New York City, NY · 25 Union Square West · 10003
At a glance
Carlyle I, II, III is a 214,333-square-foot residence hall/dormitory at 25 Union Square West in New York City, New York, built in 1989. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 58.7 kBtu/ft² and 1,029 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 58.7 kBtu/ft² |
| Source EUI | 109.2 kBtu/ft² |
| GHG emissions | 1,029 tCO₂e |
| GHG intensity | 4.8 kgCO₂e/ft² |
| Electricity | 1,706,667 kWh |
| Natural gas | 67,594 therms |
| Water use | 9,252 kgal |
| Gross floor area | 214,333 sq ft |
| Source record | nyc:2710473:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 58.7 kBtu/ft² | 1,029 tCO₂e | |
| 2023 | 79 | -5 | 51.8 kBtu/ft² | 922 tCO₂e |
| 2022 | 84 | 47.1 kBtu/ft² | 734 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
- 25 Union Square West
- City
- New York City
- State
- New York
- ZIP
- 10003
- Coordinates
- 40.73629, -73.99094
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does Carlyle I, II, III compare with other residence hall/dormitory buildings in New York City?
The latest disclosures cover 343 residence hall/dormitory buildings in New York City, out of 48,310 buildings citywide. Its site EUI of 58.7 kBtu/ft² is about 26% below the average of 79.6 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.8 kgCO₂e/ft² is about 13% below the group average of 5.5 kgCO₂e/ft².
At 214,333 sq ft, it is about 150% above the average floor area of 85,583 sq ft for those buildings. It was built in 1989, 43 years later than the group's average year built (1947). Across all 24 jurisdictions BuildingCensus covers, the 702 residence hall/dormitory buildings average an ENERGY STAR score of 70 and a site EUI of 70.7 kBtu/ft².
How has Carlyle I, II, III's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for Carlyle I, II, III, covering report years 2022–2024. Its ENERGY STAR score went from 84 in 2022 to 79 in 2023 (-5 points); its best year on file was 2022, at 84. Site EUI moved from 47.1 kBtu/ft² (2022) to 58.7 kBtu/ft² (2024), an 25% increase. Reported emissions went from 734 tCO₂e to 1,029 tCO₂e over the same span (up 40%).
What does a site EUI of 58.7 kBtu/ft² mean?
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. Carlyle I, II, III's 58.7 kBtu/ft² across 214,333 sq ft works out to about 12.6 billion Btu (3,687 MWh-equivalent) in 2024. Its source EUI of 109.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,706,667 kWh of electricity, 67,594 therms of natural gas and 9,252 thousand gallons of water for the year.
Which law requires Carlyle I, II, III to report its energy use?
Carlyle I, II, III 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:2710473:2024). 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 residence hall/dormitory buildings in New York City
- University Hall· 213,880 sq ft · score 80 (B)
- CMSV 3· 200,261 sq ft · score 92 (A)
- International House South· 194,584 sq ft · score 34 (D)
- Founders Hall· 189,845 sq ft · score 79 (B)
- RH. O'Hare Hall· 184,294 sq ft
- RH. Campbell and Salice-Conley Halls· 182,600 sq ft
- Residence Hall/Dormitory buildings in New York City· 343 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 Carlyle I, II, III's energy grade?
Carlyle I, II, III did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 58.7 kBtu/ft².
How much energy does Carlyle I, II, III use?
Its 2024 site energy-use intensity was 58.7 kBtu/ft² (109.2 kBtu/ft² source) across 214,333 sq ft, including 1,706,667 kWh of electricity and 67,594 therms of natural gas.
What are Carlyle I, II, III's carbon emissions?
Carlyle I, II, III reported 1,029 tCO₂e of greenhouse-gas emissions (4.8 kgCO₂e/ft²) for 2024.
Where is Carlyle I, II, III?
Carlyle I, II, III is at 25 Union Square West, in New York City, New York 10003. Its coordinates are 40.73629, -73.99094 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is Carlyle I, II, III and when was it built?
Carlyle I, II, III has 214,333 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1989 as its year built. It is classed as residence hall/dormitory.
Is Carlyle I, II, III 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, “Carlyle I, II, III, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/carlyle-i-ii-iii-b862de62 (data as of October 2, 2026).