ADU Regulations in Gilbert, Arizona
One of Arizona's fastest-growing suburbs in Maricopa County, Gilbert permits ADUs through local ordinance. Arizona has no statewide ADU mandate, so Gilbert's zoning code is the final authority on accessory units.
Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Gilbert as of 2026. Regulations are governed by local zoning ordinances, as Arizona has no statewide ADU mandate.
| Regulation | Requirement |
|---|---|
| Maximum Size | 1,000 sq ft |
| Property Setbacks | 5 ft rear, 5 ft side |
| Extra Parking Required | Required (1 space) |
| Owner Occupancy | Not required |
Additional Local Requirements for Gilbert
- ADU allowed in residential zones per local ordinance
- Minimum 200 sq ft
- Building permit required
- ⚠️ AZ has NO statewide ADU law — city code governs
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Get the step-by-step permit checklist, official government forms, direct planning department contacts, and estimated fees — all in one printable PDF for Gilbert, Arizona.
Download the Complete Gilbert ADU Cheat Sheet — $12Frequently Asked Questions About ADUs in Gilbert
Can I build an ADU in Gilbert?
This Arizona city permits ADUs under local ordinance. Confirm your zone's eligibility with the planning department first.
How big can my ADU be in Gilbert?
What is the maximum ADU size allowed in Gilbert? ADUs in Gilbert can be up to 1,000 square feet, subject to the property's zoning and lot coverage limits. Always confirm the exact allowed size with the Gilbert planning department before designing your project.
What about setbacks and other requirements in Gilbert?
What are the setback requirements for an ADU in Gilbert? ADUs in Gilbert generally require setbacks of 5 ft rear, 5 ft side. California state law (AB 68) limits local setback requirements to 4 feet for existing structures, but always verify with local zoning.
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