ADU (Accessory Dwelling Unit) permit in Buckeye, AZ
Yes — you need a permit for adu (accessory dwelling unit) work in Buckeye.
Building an accessory dwelling unit (casita, garage apartment) is new habitable construction and needs a building permit. New dwelling units are not in any exempt-work list; the 200 sq ft accessory-structure exemption covers only non-habitable structures.
| Permit needed? | Yes |
|---|---|
| Where the line falls | Building an accessory dwelling unit (casita, garage apart… |
| Fee | Building permit plus development impact fees per City of Buckeye Fee Schedule; no dollar figures in the code |
| Review time | Not in the ordinance |
| Code section | IRC R105.1 (permit required, no exemption for new dwelling); Development Code Sec. 3.3.4.A Accessory Dwelling Units |
| Based on | 2024 IRC as amended by City of Buckeye |
How to pull the permit
- Put together a site plan showing where the work goes, with dimensions.
- Apply through the Buckeye building department.
- Pay the permit fee when the permit is issued. Work done before that isn't covered.
- Book each inspection listed on the permit as the job reaches that stage.
Either of you can pull it. When a contractor does the work, it is normally their job.
If you skip it
Work started before a permit is issued is charged per the City of Buckeye Development User Fee Schedule.
Nearby cities, same job
Rules stop at the city line. If your lot is near a boundary, or you work across several towns, this is where they differ.
| City | Distance | Permit? | Where the line falls |
|---|---|---|---|
| Buckeye | — | Yes | Building an accessory dwelling unit (casita, garage apart… |
| Surprise | 20 mi | Yes | Building an accessory dwelling unit (casita, garage apart… |
| Avondale | 20 mi | Yes | Building an accessory dwelling unit (casita, garage apart… |
| Glendale | 27 mi | Yes | Building an accessory dwelling unit (garage apartment, ca… |
| Tempe | 41 mi | Yes | Building an accessory dwelling unit (garage apartment, ca… |
| Chandler | 47 mi | Yes | Building an accessory dwelling unit (a casita, garage apa… |
See every Arizona city on adu (accessory dwelling unit) work
Other work in Buckeye
Questions people ask
How much does a adu (accessory dwelling unit) permit cost in Buckeye?
Building permit plus development impact fees per City of Buckeye Fee Schedule; no dollar figures in the code. Valuation-based fees mean the number depends on what the job is worth, so the department quotes it when you apply.
I already built it without a permit. What now?
Buckeye can issue a stop-work order and require you to apply after the fact, sometimes with an extra fee. Work that was covered up may have to be opened for inspection. Full walkthrough here.
Does unpermitted work cause problems when selling the house?
Often, yes. A buyer's inspector or the title company may flag it, and lenders can balk at financing a home with open or missing permits. What to do about it.