San Mateo Gateway - 1800 Gateway
Office in California, CA · 1800 Gateway Drive, Foster City · 94404
At a glance
San Mateo Gateway - 1800 Gateway is a 74,840-square-foot office building at 1800 Gateway Drive, Foster City in Foster City, California, built in 1985. In its 2024 California benchmarking disclosure it reported an ENERGY STAR score of 91 out of 100 (grade A), a site energy-use intensity of 28.5 kBtu/ft² and 138 tCO₂e of greenhouse-gas emissions. That score is higher than 66% 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 | 91 (band A) |
| Site EUI | 28.5 kBtu/ft² |
| Source EUI | — |
| GHG emissions | 138 tCO₂e |
| GHG intensity | 1.8 kgCO₂e/ft² |
| Electricity | 560,402 kWh |
| Natural gas | 2,047 therms |
| Gross floor area | 74,840 sq ft |
| Source record | california:1472813:2024 |
The disclosure history
Year over year
| Year | Score | Δ | Site EUI | GHG emissions |
|---|---|---|---|---|
| 2024latest | 91 | -2 | 28.5 kBtu/ft² | 138 tCO₂e |
| 2023 | 93 | +1 | 28.5 kBtu/ft² | 145 tCO₂e |
| 2022 | 92 | 28.5 kBtu/ft² | 143 tCO₂e | |
| 2021 | — | 26.1 kBtu/ft² | 115 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
- 1800 Gateway Drive, Foster City
- City
- California
- State
- California
- ZIP
- 94404
- Coordinates
- 37.55601, -122.28094
Within ~1 km
Nearby benchmarked buildings
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- Chesapeake Pointscore 100
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See also: most efficient in California · biggest emitters
How does San Mateo Gateway - 1800 Gateway compare with other office buildings in California?
The latest disclosures cover 6,214 office buildings in California, out of 40,029 buildings citywide. San Mateo Gateway - 1800 Gateway's ENERGY STAR score of 91 compares with an average of 75 across the 4,912 that report a score; it scores higher than 66% of them and lower than 31%. Its site EUI of 28.5 kBtu/ft² is about half of 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 1.8 kgCO₂e/ft² is about half of the group average of 3.6 kgCO₂e/ft².
At 74,840 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 San Mateo Gateway - 1800 Gateway's energy performance changed over time?
BuildingCensus holds 4 California disclosures for San Mateo Gateway - 1800 Gateway, covering report years 2021–2024. Its ENERGY STAR score went from 92 in 2022 to 91 in 2024 (-1 points); its best year on file was 2023, at 93. Site EUI moved from 26.1 kBtu/ft² (2021) to 28.5 kBtu/ft² (2024), an 9% increase. Reported emissions went from 115 tCO₂e to 138 tCO₂e over the same span (up 20%).
What does an ENERGY STAR score of 91 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 91 means the building performs better than about 91% of its national peers. BuildingCensus bands the score into report-card grades; 91 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. San Mateo Gateway - 1800 Gateway's 28.5 kBtu/ft² across 74,840 sq ft works out to about 2.1 billion Btu (625 MWh-equivalent) in 2024. The disclosure also reports 560,402 kWh of electricity and 2,047 therms of natural gas for the year.
Which law requires San Mateo Gateway - 1800 Gateway to report its energy use?
San Mateo Gateway - 1800 Gateway 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:1472813:2024). 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
- 13100 Alondra· 74,838 sq ft · score 82 (B)
- Marina Park 4553· 74,827 sq ft · score 98 (A)
- Murphy Crossing - 1033 Mccarthy· 74,824 sq ft · EUI 274.8 kBtu/ft²
- Trpf 539 Bryant Street Lp· 74,736 sq ft · EUI 22.2 kBtu/ft²
- Sce - San Bernardino Reg Office (Sbro) - Main· 74,724 sq ft · score 98 (A)
- 5440-5500 West Century (#195)· 74,700 sq ft · score 98 (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 San Mateo Gateway - 1800 Gateway's energy grade?
San Mateo Gateway - 1800 Gateway scores 91 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 San Mateo Gateway - 1800 Gateway use?
Its 2024 site energy-use intensity was 28.5 kBtu/ft² across 74,840 sq ft, including 560,402 kWh of electricity and 2,047 therms of natural gas.
What are San Mateo Gateway - 1800 Gateway's carbon emissions?
San Mateo Gateway - 1800 Gateway reported 138 tCO₂e of greenhouse-gas emissions (1.8 kgCO₂e/ft²) for 2024.
Where is San Mateo Gateway - 1800 Gateway?
San Mateo Gateway - 1800 Gateway is at 1800 Gateway Drive, Foster City, in Foster City, California 94404. Its coordinates are 37.55601, -122.28094 (latitude, longitude), as published in the Building Energy Benchmarking Program (statewide) file.
How big is San Mateo Gateway - 1800 Gateway and when was it built?
San Mateo Gateway - 1800 Gateway has 74,840 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 San Mateo Gateway - 1800 Gateway 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, “San Mateo Gateway - 1800 Gateway, Foster City, California — 2024 benchmarking disclosure”, https://buildingcensus.com/buildings/california/san-mateo-gateway-1800-gateway-d9faf7aa (data as of July 9, 2026).