350 Neptune Avenue
Office in New York City, NY · 350 Neptune Ave · 11235
At a glance
350 Neptune Avenue is a 66,869-square-foot office building in New York City, New York, built in 2015. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 81 out of 100 (grade B), a site energy-use intensity of 33.9 kBtu/ft² and 261 tCO₂e of greenhouse-gas emissions. That score is higher than 54% of the 2,519 scored office buildings in New York City.
Local Law 84 (LL84) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 81 (band B) |
| Site EUI | 33.9 kBtu/ft² |
| Source EUI | 95.0 kBtu/ft² |
| GHG emissions | 261 tCO₂e |
| GHG intensity | 3.9 kgCO₂e/ft² |
| Electricity | 664,645 kWh |
| Gross floor area | 66,869 sq ft |
| Source record | nyc:6705801:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 81 | +2 | 33.9 kBtu/ft² | 261 tCO₂e |
| 2023 | 79 | +2 | 35.4 kBtu/ft² | 258 tCO₂e |
| 2022 | 77 | 37.7 kBtu/ft² | 213 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
- 350 Neptune Ave
- City
- New York City
- State
- New York
- ZIP
- 11235
- Coordinates
- 40.58075, -73.96561
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 350 Neptune 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. 350 Neptune Avenue's ENERGY STAR score of 81 compares with an average of 72 across the 2,519 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 33.9 kBtu/ft² is about half of 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 3.9 kgCO₂e/ft² is about 33% below the group average of 5.8 kgCO₂e/ft².
At 66,869 sq ft, it is about 67% below the average floor area of 205,440 sq ft for those buildings. It was built in 2015, 75 years later 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 350 Neptune Avenue's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 350 Neptune Avenue, covering report years 2022–2024. Its ENERGY STAR score went from 77 in 2022 to 81 in 2024 (+4 points). Site EUI moved from 37.7 kBtu/ft² (2022) to 33.9 kBtu/ft² (2024), a 10% decrease. Reported emissions went from 213 tCO₂e to 261 tCO₂e over the same span (up 22%).
What does an ENERGY STAR score of 81 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 81 means the building performs better than about 81% of its national peers. BuildingCensus bands the score into report-card grades; 81 falls in band B — above median (70–84). Scores of 75 or higher meet the threshold for ENERGY STAR certification; certification itself is a separate, verified application that the disclosure does not record. 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. 350 Neptune Avenue's 33.9 kBtu/ft² across 66,869 sq ft works out to about 2.3 billion Btu (664 MWh-equivalent) in 2024. Its source EUI of 95.0 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 664,645 kWh of electricity for the year.
Which law requires 350 Neptune Avenue to report its energy use?
350 Neptune 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 2024 disclosure (source record nyc:6705801:2024). 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
- Maxim Realty - 10-40 45th Ave· 66,800 sq ft · score 33 (D)
- 31 South 2 Street Campus· 66,590 sq ft · EUI 23.3 kBtu/ft²
- 104-110 East 40th Street· 66,583 sq ft · score 91 (A)
- 42 West 38 Street· 66,577 sq ft · score 89 (A)
- 42 West 38th Street· 66,577 sq ft · score 79 (B)
- 107 Grand St· 66,532 sq ft · score 72 (B)
- 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 350 Neptune Avenue's energy grade?
350 Neptune Avenue scores 81 out of 100 on ENERGY STAR — band B, above median (70–84) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 350 Neptune Avenue use?
Its 2024 site energy-use intensity was 33.9 kBtu/ft² (95.0 kBtu/ft² source) across 66,869 sq ft, including 664,645 kWh of electricity.
What are 350 Neptune Avenue's carbon emissions?
350 Neptune Avenue reported 261 tCO₂e of greenhouse-gas emissions (3.9 kgCO₂e/ft²) for 2024.
Where is 350 Neptune Avenue?
350 Neptune Avenue is in New York City, New York 11235. Its coordinates are 40.58075, -73.96561 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 350 Neptune Avenue and when was it built?
350 Neptune Avenue has 66,869 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2015 as its year built. It is classed as office.
Is 350 Neptune Avenue 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, “350 Neptune Avenue, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/350-neptune-avenue-4fa06ce2 (data as of October 2, 2026).