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Rules & Permits

Clear explanations of ADU regulations, zoning, permits, inspections, and approval processes.

California ADU Permit Process: Step-by-Step Guide for 2026

August 29, 2026 by ADU Project Planner

Infographic showing the 2026 California ADU permit process, including the 15-business-day completeness review, 60-day ministerial review, appeal process and certificate of occupancy

How does the California ADU permit process work in 2026? Follow the steps from property checks and plan preparation through the 15-business-day completeness review, 60-day ministerial decision, corrections, inspections and final occupancy.

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