Surprise ADU Zoning Rules & Permit Guide

ADU Regulations in Surprise, Arizona

Updated September 29, 2026

One of the west valley's fastest-growing cities in Maricopa County, Surprise permits ADUs through local ordinance. Property owners should verify the specific zoning district before planning an accessory unit.

Below is a summary of the key zoning rules applicable to Accessory Dwelling Units in Surprise as of 2026. Regulations are governed by local zoning ordinances, as Arizona has no statewide ADU mandate.

Additional Local Requirements for Surprise

• ADU allowed in residential zones per local ordinance
• Minimum 200 sq ft
• Building permit required
• ⚠️ AZ has NO statewide ADU law — city code governs

Frequently Asked Questions About ADUs in Surprise

Can I build an ADU in Surprise?

This Arizona city permits ADUs under local ordinance. Confirm your zone's eligibility with the planning department first.

What is the maximum ADU size allowed in Surprise?

ADUs in Surprise 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 Surprise planning department before designing your project.

What are the setback requirements for an ADU in Surprise?

ADUs in Surprise generally require setbacks of 5 ft rear, 5 ft side. Arizona has no statewide ADU mandate — the exact setback figures come from Surprise's own zoning code, so confirm them with the city planning department before you design.