435 Hudson - BM Portal (423 HUDSON STREET)
Office in New York City, NY · 423 HUDSON STREET · 10014
At a glance
435 Hudson - BM Portal (423 HUDSON STREET) is a 252,765-square-foot office building in New York City, New York, built in 1935. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 69 out of 100 (grade C), a site energy-use intensity of 68.8 kBtu/ft² and 1,732 tCO₂e of greenhouse-gas emissions. That score is higher than 33% 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 | 69 (band C) |
| Site EUI | 68.8 kBtu/ft² |
| Source EUI | 162.5 kBtu/ft² |
| GHG emissions | 1,732 tCO₂e |
| GHG intensity | 6.8 kgCO₂e/ft² |
| Electricity | 3,823,346 kWh |
| Natural gas | 43,427 therms |
| Water use | 4,052 kgal |
| Gross floor area | 252,765 sq ft |
| Source record | nyc:23247393:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 69 | +5 | 68.8 kBtu/ft² | 1,732 tCO₂e |
| 2023 | 64 | +12 | 66.5 kBtu/ft² | 1,587 tCO₂e |
| 2022 | 52 | 73.4 kBtu/ft² | 1,379 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.
Own or manage this building? Claim it to correct the record and get compliance alerts.
Location
- Address
- 423 HUDSON STREET
- City
- New York City
- State
- New York
- ZIP
- 10014
- Coordinates
- 40.73012, -74.00688
Within ~1 km
Nearby benchmarked buildings
- 550 Washington Streetscore 89
Office · 1,138,018 sq ft
Office · 987,755 sq ft
- 375 Hudson (363 HUDSON STREET)score 92
Office · 885,326 sq ft
Office · 856,538 sq ft
- 395 Hudson New York LLCscore 93
Office · 731,175 sq ft
- DEPM 1596 - 155 West 11th Streetscore 13
Multifamily Housing · 712,101 sq ft
See also: most efficient in New York City · biggest emitters
How does 435 Hudson - BM Portal (423 HUDSON STREET) 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. 435 Hudson - BM Portal (423 HUDSON STREET)'s ENERGY STAR score of 69 compares with an average of 72 across the 2,519 that report a score; it scores higher than 33% of them and lower than 65%. Its site EUI of 68.8 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft². Its emissions intensity of 6.8 kgCO₂e/ft² is about 18% above the group average of 5.8 kgCO₂e/ft².
At 252,765 sq ft, it is about 23% above the average floor area of 205,440 sq ft for those buildings. It was built in 1935, 5 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 435 Hudson - BM Portal (423 HUDSON STREET)'s energy performance changed over time?
BuildingCensus holds 3 New York City disclosures for 435 Hudson - BM Portal (423 HUDSON STREET), covering report years 2022–2024. Its ENERGY STAR score went from 52 in 2022 to 69 in 2024 (+17 points). Site EUI moved from 73.4 kBtu/ft² (2022) to 68.8 kBtu/ft² (2024), a 6% decrease. Reported emissions went from 1,379 tCO₂e to 1,732 tCO₂e over the same span (up 26%).
What does an ENERGY STAR score of 69 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 69 means the building performs better than about 69% of its national peers. BuildingCensus bands the score into report-card grades; 69 falls in band C — below median (55–69). It sits 6 points below 75, the threshold for ENERGY STAR certification. 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. 435 Hudson - BM Portal (423 HUDSON STREET)'s 68.8 kBtu/ft² across 252,765 sq ft works out to about 17.4 billion Btu (5,097 MWh-equivalent) in 2024. Its source EUI of 162.5 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 3,823,346 kWh of electricity, 43,427 therms of natural gas and 4,052 thousand gallons of water for the year.
Which law requires 435 Hudson - BM Portal (423 HUDSON STREET) to report its energy use?
435 Hudson - BM Portal (423 HUDSON STREET) 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:23247393:2024). 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
- Long Island City - 4121 27th St· 251,812 sq ft · score 35 (D)
- Federal_97-77 Queens Boulevard· 251,595 sq ft · score 90 (A)
- 100 Fifth Avenue· 250,671 sq ft · score 79 (B)
- 100-104 5th Avenue· 250,671 sq ft · score 61 (C)
- 100 Fifth Ave· 250,671 sq ft · score 100 (A)
- 130 W 42 St· 250,578 sq ft · score 97 (A)
- 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 435 Hudson - BM Portal (423 HUDSON STREET)'s energy grade?
435 Hudson - BM Portal (423 HUDSON STREET) scores 69 out of 100 on ENERGY STAR — band C, below median (55–69) — in its 2024 New York City disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 435 Hudson - BM Portal (423 HUDSON STREET) use?
Its 2024 site energy-use intensity was 68.8 kBtu/ft² (162.5 kBtu/ft² source) across 252,765 sq ft, including 3,823,346 kWh of electricity and 43,427 therms of natural gas.
What are 435 Hudson - BM Portal (423 HUDSON STREET)'s carbon emissions?
435 Hudson - BM Portal (423 HUDSON STREET) reported 1,732 tCO₂e of greenhouse-gas emissions (6.8 kgCO₂e/ft²) for 2024.
Where is 435 Hudson - BM Portal (423 HUDSON STREET)?
435 Hudson - BM Portal (423 HUDSON STREET) is in New York City, New York 10014. Its coordinates are 40.73012, -74.00688 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 435 Hudson - BM Portal (423 HUDSON STREET) and when was it built?
435 Hudson - BM Portal (423 HUDSON STREET) has 252,765 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1935 as its year built. It is classed as office.
Is 435 Hudson - BM Portal (423 HUDSON STREET) 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).
Working with New York City building benchmarking records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “435 Hudson - BM Portal (423 HUDSON STREET), New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/435-hudson-bm-portal-423-hudson-street-66208b4d (data as of October 2, 2026).