The Spiral - 66 Hudson Boulevard
Office in New York City, NY · 509 West 34th Street · 10001
At a glance
The Spiral - 66 Hudson Boulevard is a 2,830,000-square-foot office building at 509 West 34th Street in New York City, New York, built in 2022. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 82 out of 100 (grade B), a site energy-use intensity of 49.6 kBtu/ft² and 13,289 tCO₂e of greenhouse-gas emissions. That score is higher than 56% 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 | 82 (band B) |
| Site EUI | 49.6 kBtu/ft² |
| Source EUI | 110.3 kBtu/ft² |
| GHG emissions | 13,289 tCO₂e |
| GHG intensity | 4.7 kgCO₂e/ft² |
| Electricity | 27,572,384 kWh |
| Natural gas | 463,478 therms |
| Water use | 24,917 kgal |
| Gross floor area | 2,830,000 sq ft |
| Source record | nyc:5047539:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 82 | +6 | 49.6 kBtu/ft² | 13,289 tCO₂e |
| 2023 | 76 | 39.9 kBtu/ft² | 10,524 tCO₂e | |
| 2022 | — | 733.7 kBtu/ft² | 5,230 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
- 509 West 34th Street
- City
- New York City
- State
- New York
- ZIP
- 10001
- Coordinates
- 40.75478, -73.99960
Within ~1 km
Nearby benchmarked buildings
- Hudson Yards Cogen Campusscore —
Other · 7,739,076 sq ft
- Manhattan Westscore —
Other · 4,153,954 sq ft
- 20-30 Hudson Yardsscore —
Office · 3,810,623 sq ft
- Penn Southscore 95
Multifamily Housing · 3,391,963 sq ft
- 50 Hudson Yardsscore 76
Office · 2,944,455 sq ft
- PENN 1 (LL97)score —
Office · 2,488,353 sq ft
See also: most efficient in New York City · biggest emitters
How does The Spiral - 66 Hudson Boulevard 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. The Spiral - 66 Hudson Boulevard's ENERGY STAR score of 82 compares with an average of 72 across the 2,519 that report a score; it scores higher than 56% of them and lower than 42%. Its site EUI of 49.6 kBtu/ft² is about 23% 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 4.7 kgCO₂e/ft² is about 19% below the group average of 5.8 kgCO₂e/ft².
At 2,830,000 sq ft, it is about 1278% above the average floor area of 205,440 sq ft for those buildings. It was built in 2022, 82 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 The Spiral - 66 Hudson Boulevard's energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for The Spiral - 66 Hudson Boulevard, covering report years 2022–2024. Its ENERGY STAR score went from 76 in 2023 to 82 in 2024 (+6 points). Site EUI moved from 733.7 kBtu/ft² (2022) to 49.6 kBtu/ft² (2024), a 93% decrease. Reported emissions went from 5,230 tCO₂e to 13,289 tCO₂e over the same span (up 154%).
What does an ENERGY STAR score of 82 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 82 means the building performs better than about 82% of its national peers. BuildingCensus bands the score into report-card grades; 82 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. The Spiral - 66 Hudson Boulevard's 49.6 kBtu/ft² across 2,830,000 sq ft works out to about 140.4 billion Btu (41,138 MWh-equivalent) in 2024. Its source EUI of 110.3 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 27,572,384 kWh of electricity, 463,478 therms of natural gas and 24,917 thousand gallons of water for the year.
Which law requires The Spiral - 66 Hudson Boulevard to report its energy use?
The Spiral - 66 Hudson Boulevard 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:5047539:2024). 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
- 1221 Avenue of the Americas· 2,636,182 sq ft · score 86 (A)
- 225 Liberty Street· 2,577,575 sq ft · score 81 (B)
- One New York Plaza (13 SOUTH STREET)· 2,542,563 sq ft · score 59 (C)
- PENN 1 (LL97)· 2,488,353 sq ft · EUI 159.7 kBtu/ft²
- PENN 1 (Offices)· 2,439,745 sq ft
- 111 Eighth Avenue· 2,375,706 sq ft · EUI 203.2 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 The Spiral - 66 Hudson Boulevard's energy grade?
The Spiral - 66 Hudson Boulevard scores 82 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 The Spiral - 66 Hudson Boulevard use?
Its 2024 site energy-use intensity was 49.6 kBtu/ft² (110.3 kBtu/ft² source) across 2,830,000 sq ft, including 27,572,384 kWh of electricity and 463,478 therms of natural gas.
What are The Spiral - 66 Hudson Boulevard's carbon emissions?
The Spiral - 66 Hudson Boulevard reported 13,289 tCO₂e of greenhouse-gas emissions (4.7 kgCO₂e/ft²) for 2024.
Where is The Spiral - 66 Hudson Boulevard?
The Spiral - 66 Hudson Boulevard is at 509 West 34th Street, in New York City, New York 10001. Its coordinates are 40.75478, -73.99960 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is The Spiral - 66 Hudson Boulevard and when was it built?
The Spiral - 66 Hudson Boulevard has 2,830,000 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 2022 as its year built. It is classed as office.
Is The Spiral - 66 Hudson Boulevard 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, “The Spiral - 66 Hudson Boulevard, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/the-spiral-66-hudson-boulevard-10ae52d0 (data as of October 2, 2026).