Data through September 2026 · updated 23 Oct 2026
569 ADU and casita permits were issued in unincorporated Maricopa County, October 2024 through September 2026: about 284 a year and 3% of all permits. 284 ADU and casita permits in the last 12 months (Oct 2025–Sep 2026), about the same as the 285 in the 12 months before. The busiest month is July. The usual one took 241 days from issue to the county's final. 85086 has the most, 44.
Permits issued each month, October 2024 through September 2026.
| Month | Permits |
|---|---|
| Oct 2024 | 7 |
| Nov 2024 | 19 |
| Dec 2024 | 33 |
| Jan 2025 | 28 |
| Feb 2025 | 32 |
| Mar 2025 | 22 |
| Apr 2025 | 23 |
| May 2025 | 15 |
| Jun 2025 | 17 |
| Jul 2025 | 37 |
| Aug 2025 | 26 |
| Sep 2025 | 26 |
| Oct 2025 | 36 |
| Nov 2025 | 15 |
| Dec 2025 | 29 |
| Jan 2026 | 16 |
| Feb 2026 | 26 |
| Mar 2026 | 29 |
| Apr 2026 | 14 |
| May 2026 | 19 |
| Jun 2026 | 25 |
| Jul 2026 | 27 |
| Aug 2026 | 24 |
| Sep 2026 | 24 |
By calendar month, 100 = an average month (the thin line). July is the busiest (135), May the quietest (72). A busy month at the permit counter usually means a longer wait for a contractor.
| Month | Index |
|---|---|
| January | 93 |
| February | 122 |
| March | 108 |
| April | 78 |
| May | 72 |
| June | 89 |
| July | 135 |
| August | 105 |
| September | 105 |
| October | 91 |
| November | 72 |
| December | 131 |
Permits issued Oct 2024–Sep 2025, at least 12 months before the file ends. Usual days is the middle permit among the 184 with a final date.
| Measure | Value |
|---|---|
| Permits issued Oct 2024–Sep 2025 | 285 |
| Finished | 66.0% |
| Expired | 10.5% |
| Usual days, issue to final | 241 |
| Middle half, days | 175–375 |
Counted at the property's ZIP code. Share is the part of the county's 569 ADU and casita permits.
How the county filed these permits. We group its types into kinds of work; this is the split.
| Permit type | Permits | Share |
|---|---|---|
| Accessory | 261 | 46% |
| Accessory (Sub Permit) | 100 | 18% |
| New Construction | 90 | 16% |
| Production | 62 | 11% |
| Manufactured Home | 37 | 7% |
| Production (Sub Permit) | 19 | 3% |
New homes (4,134)Solar (2,840)Electrical (2,751)Garages, sheds & shade structures (1,683)Pools & spas (1,522)Fences & walls (1,303)Additions (780)Plumbing (703)Remodels & repairs (664)
ADU and casita permits for other places in Phoenix. Each permit office keeps its own file, so the numbers are not added together.
Source: Maricopa County Planning & Development building permits (ArcGIS: Building_Permits_(view) and BuildingPermitsAndAllCases), read 23 Oct 2026. We count permits issued October 2024 through September 2026; denied and withdrawn permits are left out.
Permits the county issues for unincorporated land only: Sun City, Sun City West, Anthem and New River, Rio Verde, Tonopah, Wittmann, county islands and similar places. Phoenix, Mesa, Scottsdale, Glendale and the other cities run their own permit offices and are not in this file.
Counts are permits, not jobs: one job can need several permits. Nobody paid to be on this page and nobody can. Sources and definitions →
Free to reuse with attribution (CC BY 4.0). Please credit Contractor Records and link to this page. Suggested citation:
Contractor Records, "ADU and casita permits in unincorporated Maricopa County, AZ", https://contractorrecords.com/maricopa-county/adu-permits, data through September 2026, from Maricopa County Planning & Development building-permit records.Link to a table: By month · Season · Days to final · By ZIP code · Permit types.
Download the tables (CSV): ADUs & casitas permits by month · ADUs & casitas permits by calendar month (index) · ADUs & casitas permits: days to final · ADUs & casitas permits by ZIP code · ADUs & casitas permits by permit type.