California Proposition 64 permits up to six cannabis plants per residence for adult personal use. Rancho Cucamonga requires indoor-only cultivation under Municipal Code, and outdoor cultivation is prohibited.
California Proposition 64 (the Adult Use of Marijuana Act, codified in Business and Professions Code Division 10 and Health and Safety Code 11362.1-11362.45) allows any adult age 21 or over to cultivate up to six cannabis plants per private residence for personal use, regardless of the number of adults living there. Rancho Cucamonga implements this state baseline through Municipal Code Chapter 8.52 and the Development Code, which strictly limits personal cultivation to fully enclosed and secure indoor locations such as a locked room, closet, or legal accessory structure. Outdoor cultivation in yards, patios, balconies, and on rooftops is expressly prohibited. Cultivation areas must be secured with a lockable door, kept out of view from public places, not visible from the sidewalk or neighboring properties, and may not use butane or other flammable extraction chemicals. Grow lights and irrigation must comply with Building Code and Electrical Code standards, including permitted 240-volt circuits where necessary. Rancho Cucamonga does not allow commercial cannabis cultivation, manufacturing, distribution, or retail within city limits under the current Municipal Code, which was adopted via Measure Q-style local prohibition.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in San Bernardino County.
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