Contra Costa County has no ordinance specific to cryptocurrency or blockchain mining. A commercial mining operation is treated as a data center or industrial use, allowed in the L-I, H-I, C-M, or W-3 districts under Title 8 with a land use permit, CEQA review, and General Plan noise standards.
The unincorporated county does not single out cryptocurrency, bitcoin, or blockchain mining in its Ordinance Code. Because a mining operation is a room of servers and cooling equipment, it is regulated the same as any data center: sited in the L-I, H-I, C-M, or W-3 industrial districts, often requiring a land use permit and CEQA review. Its cooling and any on-site generators are judged against the 2045 General Plan land-use compatibility standards, since the county has no stationary-source decibel ordinance. There is no county cap on mining electricity use and no adopted crypto or data-center moratorium in the unincorporated county. Small-scale hobby mining on personal equipment at home falls under ordinary residential rules, not industrial zoning.
No crypto-specific penalty exists. A commercial mine built outside an L-I, H-I, C-M, or W-3 district, or without a required land use permit and CEQA review, is a zoning violation that draws stop-work orders until it conforms.
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