Home Cultivation: Berkeley vs Castro Valley
How do home cultivation rules compare between Berkeley, CA and Castro Valley, CA?
Castro Valley has fewer restrictions than Berkeley.
Berkeley, CA
Alameda County
Adults 21 and older in Berkeley may cultivate up to six cannabis plants indoors at a private residence under Proposition 64 and BMC Chapter 12.27, with additional rules for security and odor control.
View full Berkeley rules →Castro Valley, CA
Alameda County
Health and Safety Code section 11362.2 grants every adult 21 or older the statewide right to cultivate up to six cannabis plants indoors, and bars local governments from completely prohibiting indoor personal cultivation.
View full Castro Valley rules →Key Facts Comparison
| Fact | Berkeley | Castro Valley |
|---|---|---|
| Age | 21 and older | - |
| Plant limit | Six per residence | 6 plants per residence |
| Location | Indoor or enclosed only | - |
| Visibility | Not visible from public | - |
| Landlord | May prohibit by lease | - |
| Indoor preemption | - | H&S Code 11362.2(b) |
| Minimum age | - | 21 years |
| Possession limit | - | 28.5g flower |
| Outdoor regulation | - | Local discretion |
Highlighted rows indicate differences between cities.
Berkeley FAQ
Can I grow cannabis outside in Berkeley?
Personal outdoor cultivation is generally restricted. Cultivation must be indoors or in a fully enclosed accessory structure.
How many plants can I grow?
Six plants per residence for adult personal use under Prop 64 and BMC 12.27.
Castro Valley FAQ
Can my California city ban indoor home cultivation entirely?
No. Health and Safety Code 11362.2(b)(3) expressly prohibits cities and counties from completely banning indoor personal cultivation of six plants in a private residence by adults 21 or older.
What restrictions can cities still impose?
Cities may require enclosed and locked areas, limit visibility from public spaces, mandate ventilation, and ban outdoor cultivation. They cannot impose conditions that effectively eliminate indoor cultivation.
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