ADU permit guide for San Diego, California
San Diego County, CaliforniaReviewed August 28, 2026
Development Services Department reviews local ADU permits through the City Online Portal System. Use this page to plan the local process and the fee questions to verify before you submit.
Prepared by GetYourPermit editorial teamReport an error
Permit fee planning by size
GetYourPermit research · 8 published reference lines
| ADU size | Researched range |
|---|---|
| 600 sq ft | $20,463 – $25,863 |
| 800 sq ftimpact-fee band | $23,803 – $36,303 |
| 1,000 sq ft | $25,251 – $39,751 |
| 1,200 sq ft | $26,462 – $43,562 |
Getting the permit
- Department
- Development Services Department
- Where to apply
- City Online Portal System