Adults 21 or older in SF may cultivate up to six cannabis plants per residence under Proposition 64 and Health and Safety Code Section 11362.2, with SF largely permitting indoor and limited outdoor cultivation subject to standard building and electrical codes.
California Proposition 64 capped personal cultivation at six plants per private residence regardless of how many adults live there. SF does not impose stricter local caps. Police Code Article 33 addresses non-personal cannabis activity, while personal cultivation is essentially permitted by-right indoors. Outdoor cultivation must be screened from public view and is often impractical due to SF lot sizes. Renters need landlord consent if the lease prohibits cultivation. Electrical and ventilation upgrades require building permits like any home improvement; unsafe wiring is the most common cultivation enforcement issue.
Exceeding six plants, cultivation visible from public right-of-way, or unpermitted electrical work for grow lighting can trigger DBI and fire code violations plus criminal exposure for amounts above personal-use thresholds.
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