JLJ LLC - 27 West 23rd Street - ent
Office in New York City, NY · 27 West 23rd Street · 10010
At a glance
JLJ LLC - 27 West 23rd Street - ent is a 136,850-square-foot office building in New York City, New York, built in 1880. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 43.6 kBtu/ft² and 565 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 43.6 kBtu/ft² |
| Source EUI | 92.8 kBtu/ft² |
| GHG emissions | 565 tCO₂e |
| GHG intensity | 4.1 kgCO₂e/ft² |
| Electricity | 1,015,686 kWh |
| Natural gas | 0 therms |
| Gross floor area | 136,850 sq ft |
| Source record | nyc:2658140:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 43.6 kBtu/ft² | 565 tCO₂e | |
| 2023 | — | 33.8 kBtu/ft² | 445 tCO₂e | |
| 2022 | — | 35.4 kBtu/ft² | 373 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
- 27 West 23rd Street
- City
- New York City
- State
- New York
- ZIP
- 10010
- Coordinates
- 40.74201, -73.99065
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does JLJ LLC - 27 West 23rd Street - ent compare with other office buildings in New York City?
The latest disclosures cover 3,384 office buildings in New York City, out of 48,310 buildings citywide. Its site EUI of 43.6 kBtu/ft² is about 32% below the average of 64.5 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 4.1 kgCO₂e/ft² is about 29% below the group average of 5.8 kgCO₂e/ft².
At 136,850 sq ft, it is about 33% below the average floor area of 205,440 sq ft for those buildings. It was built in 1880, 60 years earlier than the group's average year built (1940). Across all 24 jurisdictions BuildingCensus covers, the 15,264 office buildings average an ENERGY STAR score of 73 and a site EUI of 59.3 kBtu/ft².
How has JLJ LLC - 27 West 23rd Street - ent's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for JLJ LLC - 27 West 23rd Street - ent, covering report years 2022–2024. Site EUI moved from 35.4 kBtu/ft² (2022) to 43.6 kBtu/ft² (2024), an 23% increase. Reported emissions went from 373 tCO₂e to 565 tCO₂e over the same span (up 51%).
What does a site EUI of 43.6 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. JLJ LLC - 27 West 23rd Street - ent's 43.6 kBtu/ft² across 136,850 sq ft works out to about 6 billion Btu (1,749 MWh-equivalent) in 2024. Its source EUI of 92.8 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 1,015,686 kWh of electricity and 0 therms of natural gas for the year.
Which law requires JLJ LLC - 27 West 23rd Street - ent to report its energy use?
JLJ LLC - 27 West 23rd Street - ent 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:2658140:2024). 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 office buildings in New York City
- 654 Madison Avenue· 136,733 sq ft · score 62 (C)
- 608 Fifth Avenue· 136,647 sq ft · score 78 (B)
- URA Group - 50 Court Street· 136,546 sq ft · score 65 (C)
- Mosery: 580 Broadway· 136,529 sq ft · score 95 (A)
- 1 W 39th Street - LL84· 135,332 sq ft · EUI 110.8 kBtu/ft²
- 521 West 26th Street· 135,214 sq ft · EUI 46.4 kBtu/ft²
- Office buildings in New York City· 3,384 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 JLJ LLC - 27 West 23rd Street - ent's energy grade?
JLJ LLC - 27 West 23rd Street - ent did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 43.6 kBtu/ft².
How much energy does JLJ LLC - 27 West 23rd Street - ent use?
Its 2024 site energy-use intensity was 43.6 kBtu/ft² (92.8 kBtu/ft² source) across 136,850 sq ft, including 1,015,686 kWh of electricity and 0 therms of natural gas.
What are JLJ LLC - 27 West 23rd Street - ent's carbon emissions?
JLJ LLC - 27 West 23rd Street - ent reported 565 tCO₂e of greenhouse-gas emissions (4.1 kgCO₂e/ft²) for 2024.
Where is JLJ LLC - 27 West 23rd Street - ent?
JLJ LLC - 27 West 23rd Street - ent is in New York City, New York 10010. Its coordinates are 40.74201, -73.99065 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is JLJ LLC - 27 West 23rd Street - ent and when was it built?
JLJ LLC - 27 West 23rd Street - ent has 136,850 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1880 as its year built. It is classed as office.
Is JLJ LLC - 27 West 23rd Street - ent 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, “JLJ LLC - 27 West 23rd Street - ent, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/jlj-llc-27-west-23rd-street-ent-87cabef1 (data as of October 2, 2026).