LL84 NYU Langone Skirball Building
Mixed Use Property in New York City, NY · 540 First Avenue · 10016
At a glance
LL84 NYU Langone Skirball Building is a 554,128-square-foot mixed use property building at 540 First Avenue in New York City, New York, built in 1991. In its 2024 New York City benchmarking disclosure it reported a site energy-use intensity of 5.1 kBtu/ft² and 323 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 5.1 kBtu/ft² |
| Source EUI | 14.2 kBtu/ft² |
| GHG emissions | 323 tCO₂e |
| GHG intensity | 0.6 kgCO₂e/ft² |
| Electricity | 821,457 kWh |
| Gross floor area | 554,128 sq ft |
| Source record | nyc:4450216:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | — | 5.1 kBtu/ft² | 323 tCO₂e | |
| 2023 | — | 4.0 kBtu/ft² | 243 tCO₂e | |
| 2022 | — | 46.8 kBtu/ft² | 2,098 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
- 540 First Avenue
- City
- New York City
- State
- New York
- ZIP
- 10016
- Coordinates
- 40.74207, -73.97476
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does LL84 NYU Langone Skirball Building compare with other mixed use property buildings in New York City?
The latest disclosures cover 395 mixed use property buildings in New York City, out of 48,310 buildings citywide. Its site EUI of 5.1 kBtu/ft² is about 94% below the average of 92.7 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 0.6 kgCO₂e/ft² is about 93% below the group average of 7.9 kgCO₂e/ft².
At 554,128 sq ft, it is about 146% above the average floor area of 224,815 sq ft for those buildings. It was built in 1991, 34 years later than the group's average year built (1958). Across all 24 jurisdictions BuildingCensus covers, the 1,212 mixed use property buildings average an ENERGY STAR score of 69 and a site EUI of 79.8 kBtu/ft².
How has LL84 NYU Langone Skirball Building's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for LL84 NYU Langone Skirball Building, covering report years 2022–2024. Site EUI moved from 46.8 kBtu/ft² (2022) to 5.1 kBtu/ft² (2024), a 89% decrease. Reported emissions went from 2,098 tCO₂e to 323 tCO₂e over the same span (down 85%).
What does a site EUI of 5.1 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. LL84 NYU Langone Skirball Building's 5.1 kBtu/ft² across 554,128 sq ft works out to about 2.8 billion Btu (828 MWh-equivalent) in 2024. Its source EUI of 14.2 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 821,457 kWh of electricity for the year.
Which law requires LL84 NYU Langone Skirball Building to report its energy use?
LL84 NYU Langone Skirball Building 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:4450216:2024). 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 mixed use property buildings in New York City
- KERN57 - 303 East 57th Street· 539,027 sq ft · score 1 (D)
- LL84 Wagner College - 16 Buildings· 530,936 sq ft · EUI 75.9 kBtu/ft²
- FedEx Warehouse· 522,466 sq ft · EUI 60.8 kBtu/ft²
- 110 East 59th Street (110 EAST 59 STREET)· 521,340 sq ft · score 78 (B)
- 255 Greenwich Street (253 GREENWICH STREET)· 515,466 sq ft · EUI 50.4 kBtu/ft²
- 99 Tenth Avenue (501 WEST 16 STREET)· 498,449 sq ft · EUI 79.1 kBtu/ft²
- Mixed Use Property buildings in New York City· 395 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 LL84 NYU Langone Skirball Building's energy grade?
LL84 NYU Langone Skirball Building did not report an ENERGY STAR score in its 2024 disclosure, but its site energy-use intensity was 5.1 kBtu/ft².
How much energy does LL84 NYU Langone Skirball Building use?
Its 2024 site energy-use intensity was 5.1 kBtu/ft² (14.2 kBtu/ft² source) across 554,128 sq ft, including 821,457 kWh of electricity.
What are LL84 NYU Langone Skirball Building's carbon emissions?
LL84 NYU Langone Skirball Building reported 323 tCO₂e of greenhouse-gas emissions (0.6 kgCO₂e/ft²) for 2024.
Where is LL84 NYU Langone Skirball Building?
LL84 NYU Langone Skirball Building is at 540 First Avenue, in New York City, New York 10016. Its coordinates are 40.74207, -73.97476 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is LL84 NYU Langone Skirball Building and when was it built?
LL84 NYU Langone Skirball Building has 554,128 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1991 as its year built. It is classed as mixed use property.
Is LL84 NYU Langone Skirball Building 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, “LL84 NYU Langone Skirball Building, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/ll84-nyu-langone-skirball-building-40349fd4 (data as of October 2, 2026).