City of Napa must approve or deny ADU permit applications ministerially within 60 days under California Gov Code §65852.2(b). Applications go through the Building Division with site plan, floor plan, elevations, and Title 24 documentation. No discretionary hearing for code-compliant ADUs.
State law requires ministerial ADU review within 60 days of a complete application. Napa's Community Development Department processes applications through the Building Division. Required submittals include a site plan with setbacks and utilities, floor plan and elevations, Title 24 forms, and structural calculations for new construction. The city cannot impose discretionary design review, owner-occupancy (except for JADUs under §65852.22), or minimum lot sizes greater than the zone's existing minimum. School-impact fees apply only to ADUs 500 sq ft or larger. ADUs under 750 sq ft are exempt from city development impact fees. Most code-compliant ADUs reach final inspection 4-9 months after permit issuance.
Cities that exceed the 60-day review window may have ADU permits deemed approved by operation of law under Gov Code §65852.2(b). Owner-builders who skip permits face stop-work orders, double fees, and inability to legally rent the unit.
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