ADU Regulations in Mesa, Arizona
Arizona's third-largest city in Maricopa County, Mesa permits ADUs through its zoning ordinance. The state's hot desert climate influences design requirements, and local code governs all ADU approvals.
Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Mesa 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 Mesa
- ADU allowed in residential zones per local ordinance
- Minimum 200 sq ft
- Building permit required
- ⚠️ AZ has NO statewide ADU law — city code governs
📥 Download the Complete Mesa ADU Cheat Sheet
Get the step-by-step permit checklist, official government forms, direct planning department contacts, and estimated fees — all in one printable PDF for Mesa, Arizona.
Download the Complete Mesa ADU Cheat Sheet — $12Frequently Asked Questions About ADUs in Mesa
Can I build an ADU in Mesa?
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 Mesa?
What is the maximum ADU size allowed in Mesa? ADUs in Mesa 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 Mesa planning department before designing your project.
What about setbacks and other requirements in Mesa?
What are the setback requirements for an ADU in Mesa? ADUs in Mesa 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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