Public-record permit data only — not zoning, feasibility, or legal advice. Records may be incomplete, delayed, or mis-categorized. Check with your city planning department.
Across Ventura County, public records show 3,708 ADU permits in the 11 cities and areas listed below. The most active are Oxnard (888), Thousand Oaks (586) and Simi Valley (566).
| City or area | ADU permits |
|---|---|
| Camarillo | 202 |
| Fillmore | 44 |
| Moorpark | 142 |
| Ojai | 222 |
| Oxnard | 888 |
| Port Hueneme | 76 |
| Santa Paula | 16 |
| Simi Valley | 566 |
| Thousand Oaks | 586 |
| Unincorporated Ventura County | 565 |
| Ventura | 401 |
Where the numbers come from
Counts come from the California Department of Housing and Community Development's annual progress reports, which every city files with the state. Each area's page shows its yearly counts and, where the source publishes them, permit times, ADU types and declared costs.