635 Madison
Office in New York City, NY · 633 MADISON AVENUE · 10022
At a glance
635 Madison is a 149,881-square-foot office building at 633 MADISON AVENUE in New York City, New York, built in 1984. In its 2024 New York City benchmarking disclosure it reported an ENERGY STAR score of 66 out of 100 (grade C), a site energy-use intensity of 67.0 kBtu/ft² and 1,003 tCO₂e of greenhouse-gas emissions. That score is higher than 30% 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 | 66 (band C) |
| Site EUI | 67.0 kBtu/ft² |
| Source EUI | 154.1 kBtu/ft² |
| GHG emissions | 1,003 tCO₂e |
| GHG intensity | 6.7 kgCO₂e/ft² |
| Electricity | 2,021,479 kWh |
| Gross floor area | 149,881 sq ft |
| Source record | nyc:60234892:2024 |
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
- 633 MADISON AVENUE
- City
- New York City
- State
- New York
- ZIP
- 10022
- Coordinates
- 40.76372, -73.97130
Within ~1 km
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See also: most efficient in New York City · biggest emitters
How does 635 Madison 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. 635 Madison's ENERGY STAR score of 66 compares with an average of 72 across the 2,519 that report a score; it scores higher than 30% of them and lower than 69%. Its site EUI of 67.0 kBtu/ft² is roughly in line with the average of 64.5 kBtu/ft². Its emissions intensity of 6.7 kgCO₂e/ft² is about 15% above the group average of 5.8 kgCO₂e/ft².
At 149,881 sq ft, it is about 27% below the average floor area of 205,440 sq ft for those buildings. It was built in 1984, 44 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.
What does an ENERGY STAR score of 66 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 66 means the building performs better than about 66% of its national peers. BuildingCensus bands the score into report-card grades; 66 falls in band C — below median (55–69). It sits 9 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. 635 Madison's 67.0 kBtu/ft² across 149,881 sq ft works out to about 10 billion Btu (2,943 MWh-equivalent) in 2024. Its source EUI of 154.1 kBtu/ft² also counts the energy lost generating and delivering that power, which is why it is higher. The disclosure also reports 2,021,479 kWh of electricity for the year.
Which law requires 635 Madison to report its energy use?
635 Madison 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:60234892:2024). 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
- 620 Fifth Avenue (Bld 3)· 149,749 sq ft
- Fox Television Stations LLC· 149,484 sq ft · score 82 (B)
- URA Group - 44 Court Street· 149,445 sq ft · score 52 (D)
- South Bronx Charter School & Office (425 Westchester Ave)· 149,349 sq ft · score 68 (C)
- 799 Broadway (797 BROADWAY)· 149,211 sq ft · score 73 (B)
- Lexin NY 551· 149,179 sq ft · score 84 (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 635 Madison's energy grade?
635 Madison scores 66 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 635 Madison use?
Its 2024 site energy-use intensity was 67.0 kBtu/ft² (154.1 kBtu/ft² source) across 149,881 sq ft, including 2,021,479 kWh of electricity.
What are 635 Madison's carbon emissions?
635 Madison reported 1,003 tCO₂e of greenhouse-gas emissions (6.7 kgCO₂e/ft²) for 2024.
Where is 635 Madison?
635 Madison is at 633 MADISON AVENUE, in New York City, New York 10022. Its coordinates are 40.76372, -73.97130 (latitude, longitude), as published in the Energy and Water Data Disclosure file.
How big is 635 Madison and when was it built?
635 Madison has 149,881 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1984 as its year built. It is classed as office.
Is 635 Madison 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, “635 Madison, New York City, New York — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/new-york-city/635-madison-301e0845 (data as of October 2, 2026).