ADU rules in Surprise, AZ — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Accessory dwelling units (ADUs) in Surprise are regulated through the zoning code. ADUs may be permitted on certain residential lots depending on zoning district, lot size, and specific development standards. Arizona has been expanding ADU allowances through recent legislation.
The City of Surprise regulates accessory dwelling units through its zoning code. ADUs (also called casitas, guest houses, or granny flats) may be permitted on residential lots depending on zoning district, minimum lot size, and compliance with development standards including setbacks, lot coverage, height, and parking. Arizona has been moving toward expanded ADU allowances through recent legislation, with bills encouraging cities to permit ADUs in single-family residential zones. Surprise's specific ADU requirements include maximum square footage limits (often a percentage of the primary dwelling or a fixed cap), design compatibility with the primary structure, and separate utility connections. ADUs may be attached or detached structures. Building permits are required through Community Development at (623) 222-1200. HOA communities may have restrictions on guest houses or secondary structures through CC&Rs. The city's General Plan addresses housing diversity including ADU opportunities in appropriate zones.
Building an ADU without permits violates building and zoning codes. Unpermitted ADUs may face removal orders or after-the-fact permitting with additional fees. Converting structures without proper permits is also a violation.
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Side-by-side rule comparisons with other cities in Maricopa County.
See how other cities in Maricopa County handle adu rules.
See how Surprise's adu rules rules stack up against other locations.
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