Oakland ADU permits cost $2,700–$3,900 with a fast-track option for units under 800 sq ft. See 2026 fees, steps, and approval timeline.
An ADU permit in Oakland costs $2,700–$3,900 for a 600–800 sq ft unit. The base fee is $640 plus 1.3% of project value. Oakland's fast-track program for ADUs under 800 sq ft reduces both cost and time compared to full plan check.
Submit your full plan set through Oakland's Permit Center. Planning and building plan check run concurrently and take 21–45 days. After fee payment and permit issuance, inspections cover foundation, framing, rough MEP, insulation, and final sign-off for Certificate of Occupancy.
Standard ADU permits in Oakland take 45–90 days. The fast-track program for units under 800 sq ft cuts this to 20–35 days. Some hillside parcels require geotechnical review, which can add 2–4 weeks regardless of ADU size.
Find the soonest DMV slot near you.
Check what you can build on any parcel.
We're building the simplest civic toolkit.