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 Central Orange County, public records show 7,014 ADU permits in the 9 cities listed below. The most active are Garden Grove (2,578), Santa Ana (1,140) and Westminster (1,128).
| City | ADU permits |
|---|---|
| Costa Mesa | 399 |
| Fountain Valley | 422 |
| Garden Grove | 2,578 |
| Huntington Beach | 473 |
| Newport Beach | 247 |
| Orange | 551 |
| Santa Ana | 1,140 |
| Tustin | 76 |
| Westminster | 1,128 |
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.