511 Fifth Avenue
Office in New York City, NY · 10017
At a glance
511 Fifth Avenue is a 125,632-square-foot office building in New York City, New York, built in 1917. In its 2023 New York City benchmarking disclosure it reported a site energy-use intensity of 27.1 kBtu/ft² and 371 tCO₂e of greenhouse-gas emissions.
Local Law 84 (LL84) · reporting year 2023
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | — |
| Site EUI | 27.1 kBtu/ft² |
| Source EUI | 76.0 kBtu/ft² |
| GHG emissions | 371 tCO₂e |
| GHG intensity | 3.0 kgCO₂e/ft² |
| Electricity | 999,209 kWh |
| Natural gas | 0 therms |
| Water use | 4,452 kgal |
| Gross floor area | 125,632 sq ft |
| Source record | nyc:26618327:2023 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2023latest | — | 27.1 kBtu/ft² | 371 tCO₂e | |
| 2022 | 91 | 25.9 kBtu/ft² | 275 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
- 511 Fifth Avenue
- City
- New York City
- State
- New York
- ZIP
- 10017
- Coordinates
- 40.75400, -73.98050
Within ~1 km
Nearby benchmarked buildings
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- 1221 Avenue of the Americasscore 86
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See also: most efficient in New York City · biggest emitters
How does 511 Fifth Avenue 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 27.1 kBtu/ft² is about 58% 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 3.0 kgCO₂e/ft² is about half of the group average of 5.8 kgCO₂e/ft².
At 125,632 sq ft, it is about 39% below the average floor area of 205,440 sq ft for those buildings. It was built in 1917, 23 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 511 Fifth Avenue's energy performance changed over time?
BuildingCensus holds 2 New York City disclosures for 511 Fifth Avenue, covering report years 2022–2023. Site EUI moved from 25.9 kBtu/ft² (2022) to 27.1 kBtu/ft² (2023), an 5% increase. Reported emissions went from 275 tCO₂e to 371 tCO₂e over the same span (up 35%).
What does a site EUI of 27.1 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. 511 Fifth Avenue's 27.1 kBtu/ft² across 125,632 sq ft works out to about 3.4 billion Btu (998 MWh-equivalent) in 2023. Its source EUI of 76.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 999,209 kWh of electricity, 0 therms of natural gas and 4,452 thousand gallons of water for the year.
Which law requires 511 Fifth Avenue to report its energy use?
511 Fifth Avenue 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 2023 disclosure (source record nyc:26618327:2023). 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
- 117 GRATTAN STREET· 125,400 sq ft · score 100 (A)
- 117 Grattan St· 125,400 sq ft · score 100 (A)
- 411 Fifth Avenue Associates / 411 5th Ave· 125,000 sq ft · score 87 (A)
- Axel Building· 125,000 sq ft · EUI 113.8 kBtu/ft²
- 3500 48th Street Owner LLC· 124,564 sq ft · EUI 111.8 kBtu/ft²
- Building 1, 158-11 Jewel Avenue· 124,525 sq ft · EUI 189.1 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 511 Fifth Avenue's energy grade?
511 Fifth Avenue did not report an ENERGY STAR score in its 2023 disclosure, but its site energy-use intensity was 27.1 kBtu/ft².
How much energy does 511 Fifth Avenue use?
Its 2023 site energy-use intensity was 27.1 kBtu/ft² (76.0 kBtu/ft² source) across 125,632 sq ft, including 999,209 kWh of electricity and 0 therms of natural gas.
What are 511 Fifth Avenue's carbon emissions?
511 Fifth Avenue reported 371 tCO₂e of greenhouse-gas emissions (3.0 kgCO₂e/ft²) for 2023.
Where is 511 Fifth Avenue?
511 Fifth Avenue is in New York City, New York 10017. Its coordinates are 40.75400, -73.98050 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 511 Fifth Avenue and when was it built?
511 Fifth Avenue has 125,632 sq ft of gross floor area, as reported in its 2023 disclosure. The disclosure lists 1917 as its year built. It is classed as office.
Is 511 Fifth Avenue covered by Local Law 84 (LL84)?
Yes — it appears in the 2023 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, “511 Fifth Avenue, New York City, New York — 2023 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/511-fifth-avenue-a652326a (data as of October 2, 2026).