5 rules for unincorporated Pinal County, Arizona.
Verified from official government sources
Unincorporated Pinal County allows ADUs on single-family lots. Lots under one acre may have one attached plus one detached ADU; lots one acre or larger may have one attached plus two detached. ADUs need only five feet from side and rear property lines.
A one-story detached storage shed, tool shed, or playhouse is exempt from a Pinal County building permit if its roof area does not exceed 200 square feet and it has no electrical, plumbing, or mechanical connections. Zoning setbacks still apply.
Converting a garage into living space in unincorporated Pinal County requires building permits and must meet zoning, setback, and required off-street parking rules. Under Arizona's ADU law a converted garage may qualify as an accessory dwelling unit.
Carports are accessory structures in Pinal County. Unlike small sheds they are not covered by the 200-square-foot permit exemption, so a carport, patio cover, or awning generally requires a building permit and must meet the accessory-building setbacks for the zone.
A permanent tiny home on a foundation is regulated as a single-family dwelling or an accessory dwelling unit and must meet the building code and ADU rules. Pinal County's zoning code bars mobile or manufactured homes as a guest house/casita except where such homes are permitted in the zone.
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