100 Montgomery
Office in California, CA · 120 Montgomery St, San Francisco · 94104
At a glance
100 Montgomery is a 478,430-square-foot office building at 120 Montgomery St, San Francisco in San Francisco, California, built in 1955. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 86 out of 100 (grade A), a site energy-use intensity of 32.1 kBtu/ft² and 1,036 tCO₂e of greenhouse-gas emissions. That score is higher than 54% 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 | 86 (band A) |
| Site EUI | 32.1 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 1,036 tCO₂e |
| GHG intensity | 2.2 kgCO₂e/ft² |
| Electricity | 2,496,133 kWh |
| Gross floor area | 478,430 sq ft |
| Source record | california:1221395:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 86 | 32.1 kBtu/ft² | 1,036 tCO₂e | |
| 2023 | — | — | 1,220 tCO₂e | |
| 2022 | 87 | +2 | 38.6 kBtu/ft² | 1,254 tCO₂e |
| 2021 | 85 | -5 | 38.7 kBtu/ft² | 1,160 tCO₂e |
| 2020 | 90 | +9 | 43.5 kBtu/ft² | 1,283 tCO₂e |
| 2019 | 81 | +2 | 52.0 kBtu/ft² | 1,603 tCO₂e |
| 2018 | 79 | 48.8 kBtu/ft² | 1,560 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.
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Location
- Address
- 120 Montgomery St, San Francisco
- City
- California
- State
- California
- ZIP
- 94104
- Coordinates
- 37.79038, -122.40186
Within ~1 km
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See also: most efficient in California · biggest emitters
How does 100 Montgomery compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. 100 Montgomery's ENERGY STAR score of 86 compares with an average of 75 across the 4,912 that report a score; it scores higher than 54% of them and lower than 44%. Its site EUI of 32.1 kBtu/ft² is about 43% below the average of 56.4 kBtu/ft² — it uses less energy per square foot than the typical building in that group. Its emissions intensity of 2.2 kgCO₂e/ft² is about 40% below the group average of 3.6 kgCO₂e/ft².
At 478,430 sq ft, it is about 215% above the average floor area of 151,937 sq ft for those buildings. It was built in 1955, 30 years earlier than 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 Montgomery's energy performance changed over time?
BuildingCensus holds 7 California disclosures for 100 Montgomery, covering report years 2018–2024. Its ENERGY STAR score went from 79 in 2018 to 86 in 2024 (+7 points); its best year on file was 2020, at 90. Site EUI moved from 48.8 kBtu/ft² (2018) to 32.1 kBtu/ft² (2024), a 34% decrease. Reported emissions went from 1,560 tCO₂e to 1,036 tCO₂e over the same span (down 34%).
What does an ENERGY STAR score of 86 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 86 means the building performs better than about 86% of its national peers. BuildingCensus bands the score into report-card grades; 86 falls in band A — high performer (85–100). 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 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 Montgomery's 32.1 kBtu/ft² across 478,430 sq ft works out to about 15.4 billion Btu (4,501 MWh-equivalent) in 2024. The disclosure also reports 2,496,133 kWh of electricity for the year.
Which law requires 100 Montgomery to report its energy use?
100 Montgomery 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:1221395:2024). 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
- 215 Fremont· 477,815 sq ft
- Bcal 101 North Brand Property Llc· 476,476 sq ft · score 97 (A)
- Marin County Civic Center· 470,168 sq ft · score 93 (A)
- Cxp - 650 California Street· 470,000 sq ft · score 85 (A)
- 888 Brannan Street· 469,669 sq ft · score 83 (B)
- One Post Street· 468,562 sq ft · score 81 (B)
- 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 Montgomery's energy grade?
100 Montgomery scores 86 out of 100 on ENERGY STAR — band A, high performer (85–100) — in its 2024 California disclosure. Scores are national percentiles against similar buildings; 75+ qualifies for ENERGY STAR certification.
How much energy does 100 Montgomery use?
Its 2024 site energy-use intensity was 32.1 kBtu/ft² across 478,430 sq ft, including 2,496,133 kWh of electricity.
What are 100 Montgomery's carbon emissions?
100 Montgomery reported 1,036 tCO₂e of greenhouse-gas emissions (2.2 kgCO₂e/ft²) for 2024.
Where is 100 Montgomery?
100 Montgomery is at 120 Montgomery St, San Francisco, in San Francisco, California 94104. Its coordinates are 37.79038, -122.40186 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is 100 Montgomery and when was it built?
100 Montgomery has 478,430 sq ft of gross floor area, as reported in its 2024 disclosure. The disclosure lists 1955 as its year built. It is classed as office.
Is 100 Montgomery 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 Montgomery, San Francisco, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/100-montgomery-1cdefd6f (data as of July 9, 2026).