ADU permits & trends, state by state
We track building-permit activity across the country so you can see where ADUs are booming. Here's the last 12 months.
Updated June 2026 · last 12 monthsTop states by permit volume
Ranked by ADU building permits issued in the last 12 months.
- 1California18,400
- 2Texas9,200
- 3Florida6,800
- 4Washington4,500
- 5Oregon3,100
- 6Colorado2,400
ADU permits issued in the last year
Click any column header to sort. Year-over-year change compares to the prior 12 months.
| State ▲ | Permits (12 mo) ▲ | Share | YoY change ▲ | Median cost ▲ | Most active city ▲ |
|---|---|---|---|---|---|
| 1California CA | 18,400 | ▲ 21% | $225K | Los Angeles | |
| 2Texas TX | 9,200 | ▲ 17% | $168K | Austin | |
| 3Florida FL | 6,800 | ▲ 24% | $172K | Miami | |
| 4Washington WA | 4,500 | ▲ 14% | $198K | Seattle | |
| 5Oregon OR | 3,100 | ▲ 11% | $186K | Portland | |
| 6Colorado CO | 2,400 | ▲ 9% | $179K | Denver |
How we count: figures reflect ADU-specific building permits pulled from city & county permit offices over the trailing 12 months. Counts exclude demolitions and permit revisions. YoY change compares the same period one year earlier.
What stood out this year
Methodology & sources
ADU Wizard aggregates ADU-specific building-permit records published by municipal and county permitting departments, normalized to a trailing-12-month window. Median costs blend permit-declared valuations with homeowner-reported final costs from projects planned through ADU Wizard. Figures are estimates for guidance, not official statistics.