ADU rules in Yuma, AZ — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Under Arizona HB 2570 (ARS §9-462.01), Yuma must allow ADUs on single-family residential lots. The city cannot ban ADUs, require owner-occupancy, or mandate additional parking. ADUs must be at least 300 square feet and comply with building codes.
Arizona's ADU law (HB 2570, effective 2021) requires Yuma to permit accessory dwelling units on all single-family lots. Key provisions: ADUs cannot be banned in single-family zones; owner-occupancy cannot be required; additional parking cannot be mandated; the city can regulate size (minimum 300 sq ft), setbacks, and design. ADUs may be attached or detached from the main dwelling. Detached ADUs must meet accessory structure setback requirements (3 feet from side and rear property lines for structures up to 8 feet; additional setback for taller structures). ADUs must have separate utility connections per city requirements. A building permit is required from the Building Safety Division. In Yuma's agricultural fringe areas, lot sizes are often generous enough to easily accommodate ADUs.
Building an ADU without a permit may result in code enforcement action and required permitting or removal.
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See how Yuma's adu rules rules stack up against other locations.
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