ADU rules in Marana, AZ — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Marana adopted ADU regulations under HB 2720 (LDC §17-6-14). State law applies: max ADU size 75% of primary dwelling or 1,000 sq ft; side/rear setback minimum 5 feet; no parking required. ADUs on lots with new ADUs (post Sep 14, 2024) used as STRs require owner-occupancy.
Marana's ADU regulations (LDC §17-6-14) were developed per Arizona HB 2720 deadline of January 1, 2025. Key rules mirror state minimums: max ADU size is 75% of primary gross floor area or 1,000 sq ft (whichever is less); minimum 5-foot side/rear setbacks; no additional parking required. ADUs built after September 14, 2024 used as STRs require owner to reside on property (Ordinance 2024.023). HOAs in master-planned communities may further restrict ADUs.
Unpermitted ADUs face stop-work orders and removal or legalization requirements. Fines of $500–$2,000 apply for unpermitted construction. Properties with illegal ADUs may face title issues at sale.
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Side-by-side rule comparisons with other cities in Pima County.
See how other cities in Pima County handle adu rules.
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