Fresno ADU permits cost $2,200–$3,200 — lower than most CA cities. See exact fee estimates, required documents, and approval timelines for 2026.
An ADU permit in Fresno runs $2,200–$3,200 for a 600–800 sq ft unit. Base permit fee is $460, plus 1.1% of project value. Impact fees may apply for ADUs over 750 sq ft, adding $1,000–$3,000 depending on location.
Submit your permit application with a site plan and floor plans through Fresno's Development Services. Plan check takes 10–21 days. After fee payment, inspections cover foundation, framing, rough mechanical systems, and a final walkthrough for Certificate of Occupancy.
Fresno ADU permits typically take 21–45 days for units under 1,000 sq ft. The city has a streamlined review process for smaller ADUs. Factor in additional time if impact fee calculations are needed.
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