100 Hamilton
Office in California, CA · 100 Hamilton Avenue, Palo Alto · 94301
At a glance
100 Hamilton is a 71,827-square-foot office building at 100 Hamilton Avenue, Palo Alto in Palo Alto, California, built in 1985. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 51 out of 100 (grade D), a site energy-use intensity of 87.2 kBtu/ft² and 385 tCO₂e of greenhouse-gas emissions. That score is higher than 16% of the 4,912 scored office buildings in California.
AB 802 (Public Resources Code §25402.10) · reporting year 2024
Benchmarking record
| Field | Value |
|---|---|
| ENERGY STAR score | 51 (band D) |
| Site EUI | 87.2 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 385 tCO₂e |
| GHG intensity | 5.4 kgCO₂e/ft² |
| Electricity | 1,377,403 kWh |
| Natural gas | 13,775 therms |
| Gross floor area | 71,827 sq ft |
| Source record | california:3584940:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 51 | +1 | 87.2 kBtu/ft² | 385 tCO₂e |
| 2023 | 50 | -7 | 91.0 kBtu/ft² | 434 tCO₂e |
| 2019 | 57 | +12 | 87.8 kBtu/ft² | 386 tCO₂e |
| 2018 | 45 | 95.1 kBtu/ft² | 428 tCO₂e |
Compliance context
AB 802 (Public Resources Code §25402.10)
AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
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
- 100 Hamilton Avenue, Palo Alto
- City
- California
- State
- California
- ZIP
- 94301
- Coordinates
- 37.44265, -122.16214
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 100 Hamilton compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 100 Hamilton's ENERGY STAR score of 51 compares with an average of 75 across the 4,912 that report a score; it scores higher than 16% of them and lower than 83%. Its site EUI of 87.2 kBtu/ft² is about 55% above the average of 56.4 kBtu/ft² — it uses more energy per square foot than the typical building in that group. Its emissions intensity of 5.4 kgCO₂e/ft² is about 49% above the group average of 3.6 kgCO₂e/ft².
At 71,827 sq ft, it is about half of the average floor area of 151,937 sq ft for those buildings. Its 1985 construction date is close to the group's average year built (1985). 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 100 Hamilton's energy performance changed over time?
BuildingCensus holds 4 California disclosures for 100 Hamilton, covering report years 2018, 2019, 2023, 2024. Its ENERGY STAR score went from 45 in 2018 to 51 in 2024 (+6 points); its best year on file was 2019, at 57. Site EUI moved from 95.1 kBtu/ft² (2018) to 87.2 kBtu/ft² (2024), a 8% decrease. Reported emissions went from 428 tCO₂e to 385 tCO₂e over the same span (down 10%).
What does an ENERGY STAR score of 51 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 51 means the building performs better than about 51% of its national peers. BuildingCensus bands the score into report-card grades; 51 falls in band D — lowest band (1–54). It sits 24 points below 75, the threshold for ENERGY STAR certification. In California, 65% 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. 100 Hamilton's 87.2 kBtu/ft² across 71,827 sq ft works out to about 6.3 billion Btu (1,836 MWh-equivalent) in 2024. The disclosure also reports 1,377,403 kWh of electricity and 13,775 therms of natural gas for the year.
Which law requires 100 Hamilton to report its energy use?
100 Hamilton reports under AB 802 (Public Resources Code §25402.10), the legal basis of California's Building Energy Benchmarking Program (statewide), which publishes each covered building's annual benchmarking results. The record shown here is the report-year 2024 disclosure (source record california:3584940:2024). AB 802 requires every California commercial building over 50,000 sq ft to report energy use to the CEC annually; the CEC publicly discloses the results statewide.
More office buildings in California
- Ebp 1900· 71,821 sq ft · score 93 (A)
- Rancho Cordova Building C· 71,817 sq ft · EUI 38.2 kBtu/ft²
- Vista Sorrento· 71,814 sq ft · score 84 (B)
- 6200 Greenwich Drive· 71,796 sq ft · score 75 (B)
- Slate Creek Corporate Centre· 71,789 sq ft · score 93 (A)
- 7919 Folsom Blvd· 71,769 sq ft · score 91 (A)
- Office buildings in California· 6,214 benchmarked
- All California benchmarked buildings· AB 802 (Public Resources Code §25402.10)
- Most efficient large buildings in California
- Least efficient large buildings in California
- Biggest emitters in California
Frequently asked questions
What is 100 Hamilton's energy grade?
100 Hamilton scores 51 out of 100 on ENERGY STAR — band D, lowest band (1–54) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 100 Hamilton use?
Its 2024 site energy-use intensity was 87.2 kBtu/ft² across 71,827 sq ft, including 1,377,403 kWh of electricity and 13,775 therms of natural gas.
What are 100 Hamilton's carbon emissions?
100 Hamilton reported 385 tCO₂e of greenhouse-gas emissions (5.4 kgCO₂e/ft²) for 2024.
Where is 100 Hamilton?
100 Hamilton is at 100 Hamilton Avenue, Palo Alto, in Palo Alto, California 94301. Its coordinates are 37.44265, -122.16214 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 100 Hamilton and when was it built?
100 Hamilton has 71,827 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1985 as its year built. It is classed as office.
Is 100 Hamilton covered by AB 802 (Public Resources Code §25402.10)?
Yes — it appears in the 2024 Building Energy Benchmarking Program (statewide) disclosure, which lists the buildings reporting under AB 802 (Public Resources Code §25402.10).
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About this data
Source: Building Energy Benchmarking Program (statewide) (AB 802 (Public Resources Code §25402.10)), as published July 9, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “100 Hamilton, Palo Alto, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/100-hamilton-436becb0 (data as of July 9, 2026).