Tuolumne County has no data-center-specific zoning. A data center is an industrial use and belongs in the M-1 (Light Industrial) or M-2 (Heavy Industrial) districts under Chapter 17.16. County rules govern only unincorporated land; the City of Sonora sets its own zoning.
Rural Tuolumne County has no data centers and no ordinance naming them. Under Title 17, Chapter 17.16, a computing or server facility is treated as a general industrial use and must locate in the M-1 Light Industrial or M-2 Heavy Industrial district. Both districts permit general manufacturing, warehousing, and public utility distribution facilities by right, while public utility uses and wireless communication towers require a discretionary use permit. Because a large data center carries utility-scale power and cooling infrastructure, the Community Development Department classifies the use and routes a project through use-permit review. Any discretionary approval also triggers CEQA environmental review. Chapter 17.16 governs unincorporated areas only; the City of Sonora applies its own zoning code.
Building a data center on land not zoned M-1 or M-2, or without a use permit, is a zoning violation. The county can withhold building permits, issue stop-work orders, and pursue code enforcement until the parcel is rezoned or permitted.
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