Chandler permits accessory dwelling units by-right under Arizona Revised Statutes section 9-461.18, enacted by HB 2720 in 2024 and effective for cities over 75,000 population on or before January 1, 2025. Chandler's Land Use and Zoning Code (City Code Chapter 35) was amended in late 2024 to comply. Single-family lots may have one detached and one attached ADU; lots over one acre may add a third detached ADU.
Arizona HB 2720, codified at Ariz. Rev. Stat. section 9-461.18, requires Chandler (population over 280,000) to allow accessory dwelling units by-right on lots zoned for single-family use. Chandler's City Council adopted Ordinance amendments to Chapter 35 (Land Use and Zoning Code) in November 2024 to implement the state mandate. Lots are entitled to one detached ADU and one attached/internal ADU as a matter of right (two total); lots exceeding one acre may add a second detached unit (three total). Applicants submit through the Chandler Development Services Department for building, plumbing, mechanical, and electrical permits, with all work subject to the 2024 International Residential Code and 2024 International Fuel Gas Code as adopted by Chandler. Plan review timelines are roughly two to six weeks for residential additions. The state statute preempts most prior local restrictions including design-match requirements, additional parking, and short-term rental prohibitions.
Constructing or occupying an ADU without permits from Chandler Development Services violates the City building code and Chapter 35, triggering stop-work orders, daily fines, and required removal or legalization. Unpermitted electrical, plumbing, or gas work creates safety risk and can void homeowner insurance. Failure to obtain a final certificate of occupancy prevents lawful habitation and complicates future sale of the property.
Chandler, AZ
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Chandler, AZ
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Chandler, AZ
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Chandler, AZ
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Chandler, AZ
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