ADU permit guide for Benicia, California
Solano County, CaliforniaReviewed August 29, 2026
Use this page for early ADU permit planning in Benicia. A verified local process guide is not available yet, so confirm every step and fee with the city before you submit.
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Permit fee planning by size
GetYourPermit research · 7 published reference lines
| ADU size | Researched range |
|---|---|
| 600 sq ft | $13,322 – $18,835 |
| 800 sq ftimpact-fee band | $22,442 – $30,973 |
| 1,000 sq ft | $26,905 – $37,060 |
| 1,200 sq ft | $31,448 – $43,236 |
Getting the permit
We have not written Benicia’s permit guide yet. The official sources below are the right place to start.
View official permit starting points