Statewide law
California law sets a baseline for ADUs that applies across jurisdictions.
Location
ADUs in San Bernardino, California
ADU projects in San Bernardino can involve both statewide California law and local city or county planning, permitting, and inspection processes.
Local process
Cities and counties administer planning review, permits, and inspections.
Your property
Lot conditions, existing structures, and utilities all affect what's feasible.
In development
Detailed San Bernardino information — including links to the jurisdiction's official planning and building department resources — is being prepared. ADU California does not publish local regulations it cannot source directly.
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