ADU permit guide for Vallejo, California
Solano County, CaliforniaReviewed August 29, 2026
Use this page for early ADU permit planning in Vallejo. A verified local process guide is not available yet, so confirm every step and fee with the city before you submit.
Prepared by GetYourPermit editorial teamReport an error
Permit fee planning by size
GetYourPermit research · 1 published reference line
| ADU size | Researched range |
|---|---|
| 600 sq ft | $8,710 – $19,130 |
| 800 sq ftimpact-fee band | $13,430 – $32,320 |
| 1,000 sq ft | $16,150 – $39,210 |
| 1,200 sq ft | $18,570 – $45,500 |
Getting the permit
We have not written Vallejo’s permit guide yet. The official sources below are the right place to start.
View official permit starting points