ADU permit guide for San Jose, California
Santa Clara County, California
San Jose Planning, Building & Code Enforcement (Development Services / Permit Center) reviews local ADU permits through SJPermits.org / SJePlans. Use this page to plan the local process and the fee questions to verify before you submit.
Prepared by GetYourPermit editorial teamReport an error
Estimated permit fees by size
7 fee lines · low to high
| ADU size | Estimated fees |
|---|---|
| 400 sq ft | $5,100 – $32,500 |
| 500 sq ft | $5,100 – $32,500 |
| 749 sq ft | $5,100 – $32,500 |
| 750 sq ftimpact-fee threshold | $5,100 – $32,500 |
| 751 sq ft | $5,100 – $32,500 |
| 1,000 sq ft | $5,100 – $32,500 |
| 1,200 sq ft | $5,100 – $32,500 |
Getting the permit
- Department
- San Jose Planning, Building & Code Enforcement (Development Services / Permit Center)
- Where to apply
- SJPermits.org / SJePlans
- Typical timeline
- Preapproved-vendor ADU plans can be issued the same day as the plan review meeting; custom plans go through prescreen, plan review, and issuance review, subject to the state's 60-day mandatory review timeframe for complete applications.
Read before you budget
- Most fee lines are working estimates rather than verified published city rates. Confirm every line with the city before budgeting.
- Totals do not vary by ADU size for this city, so the size selector will not change the estimate.