The City of San Mateo has no cryptocurrency-mining ordinance. A commercial mining operation is handled as a data center: classified by the Zoning Administrator into an M1 or office district and bound by the Chapter 7.30 noise limits.
San Mateo's Municipal Code contains no crypto-mining, bitcoin, or blockchain use category and no energy limit aimed at mining. A room of mining rigs draws power and throws off heat and noise like any data center, so it is sited under Chapter 27.56 in an M1 manufacturing district or in an E1 or E2 office district, admitted as a compatible use by the Zoning Administrator or through a special use permit under Chapter 27.74. Cooling noise must stay inside the Sec. 7.30.040 standards: 70 dB in a manufacturing zone, 60 dB day and 50 dB night where it reaches a single-family home. Mining at home is ordinary residential use under the same noise limits.
No crypto-specific penalties exist. Mining outside a district where the use is classified, or without a required special use permit, is a zoning violation, and excess noise is enforced under Chapter 7.30.
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