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Alameda County
2 data center projects we know about. 15 cities and unincorporated areas.
Built & runningBeing builtApproved, not built yetProposedStopped or cancelled
Projects
Being built
STACK SVY03A data center campus
Hayward, Alameda County
11.3 acres
🕒 May 22, 2025: Hayward Planning Commission approved the project; no appeals were filed.
ProposedValley Oak data center at former USG plant (Shinn Street)
Fremont, Alameda County
12.5 acres
🕒 Feb 2023: Valley Oak Partners filed plans with Fremont for a 90 MW data center.
Reported in the news, not confirmed yet
Local votes and rules
⏸️ Pause on new data centers · Oakland
A council committee approved a 45-day pause on new data center proposals. The full council vote was set for October 6, 2026; the result was not found.
Sept 2026Source
✅ Approved · Hayward
The Planning Commission approved the Stack data center. No appeals were filed.
May 22, 2025Source
Find your town
In California, cities and towns decide inside their limits. Outside them, the county decides.