Solano County, CA Data Centers & Crypto Mining: Data Center Zoning & Siting (2026)
Key Facts
- Dedicated Ordinance
- None; general industrial zoning
- Zones
- M-L, M-G-1/2, M-G-3, I-WD
- M-L Setbacks
- 30 ft front / 10 ft side
- Review Trigger
- Sec. 28.95 + CEQA
- Jurisdiction
- Unincorporated county only
Summary
Solano County has no dedicated data center ordinance. In the unincorporated county, a data center is treated as an industrial use and belongs in the M-L, M-G, or I-WD manufacturing districts under Chapter 28. Large facilities trigger performance-standards review and CEQA. Cities set their own zoning.
The purpose of the M-G District is to permit the normal operations of almost all industries, subject only to those regulations needed to control congestion and to protect the surrounding area or adjoining premises.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 1868, passed April 9, 2026).
Full Breakdown
Unincorporated Solano County regulates data centers only through its general industrial zoning, not a data-center-specific chapter. Under Chapter 28, computing and server facilities fit the Manufacturing-Limited (M-L) 'industrial park' district (research, warehousing, electronics manufacturing) or the Manufacturing-General (M-G-1/2, M-G-3) districts, where 'general manufacturing' is allowed by right. Because a large data center carries utility-scale power and cooling, the Zoning Administrator can invoke the Section 28.95 performance-standards procedure, and any use permit or discretionary approval triggers CEQA review. M-L setbacks are 30-foot front, 10-foot side, 50-foot height; M-G is 10-foot front and 20-foot side. No data centers currently operate in the unincorporated county. This applies only to unincorporated land; the seven cities each apply their own zoning.
Violations & Fines
Building a data center on land not zoned M-L, M-G, or I-WD, or ignoring performance-standards conditions or required CEQA review, is a zoning violation. Solano County can withhold building permits, issue stop-work orders, and pursue code enforcement.
Frequently Asked Questions
Where can a data center be built in unincorporated Solano County?
Does Solano County zoning apply inside its cities?
Does Solano County have data center rules, and how can I weigh in?
Sources & Official References
Other rules in Solano County
California rules heatmap·Compare Solano County to another location·View the California data centers & crypto mining overview
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