Unincorporated Nevada County has no cryptocurrency-mining ordinance. A commercial mining facility is regulated like a data center - an industrial use needing a Development Permit in BP, M1, or M2, or a Use Permit if intensive - and must meet the same General Plan noise limits.
The county zoning code has no crypto-mining, bitcoin, or blockchain use category. A warehouse of mining rigs draws the same power, heat, and noise as a data center, so the Planning Department classifies it as an industrial use under Section 12.02.050 - a Development Permit for light industrial, or a Use Permit for a more intensive M2 operation - with CEQA review of power and water demand. Continuous noise from rigs and cooling must stay within the General Plan Table 9.1 limits measured at the nearest home or school: 45 dBA Leq at night for residential land, 40 dBA for rural land. Home-scale mining is treated as ordinary residential use, subject to those same neighbor-measured noise limits.
There are no crypto-specific penalties. A commercial mining facility operating without the required Development or Use Permit is a zoning violation, and noise exceeding the Table 9.1 limits is enforced by the Planning Department through inspections and complaints.
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