Can I add an accessory dwelling unit (ADU) or guest house in Maricopa?

Maricopa's zoning code does not have a standalone accessory dwelling unit ordinance. Instead, it regulates a "guest quarter": a detached accessory structure may add bathroom facilities only with zoning administrator and building official approval, and the property owner must sign a recorded restrictive covenant promising not to use the structure as a second dwelling unit, unless the structure is approved as a guest quarter (MCC 18.80.020). Guest quarters were permitted by right (P) in the RS-1 sample of the residential use table reviewed this session, but marked not permitted (X) in RS-3, RS-4, and RS-5 in that same sample; confirm the complete Table 18.35.020 guest-quarters row for your district directly, since only part of the table was verified. Separately, Arizona's 2024 accessory dwelling unit statute (A.R.S. Sec. 9-461.18, HB2720) requires cities and towns of 75,000 or more residents to allow ADUs by right. The City of Maricopa's own population page states approximately 73,300 residents, but that is a stale marketing-page figure; the U.S. Census Bureau's most recent estimate and the Arizona Office of Economic Opportunity / Maricopa Association of Governments official estimates both put Maricopa's population above 75,000 as of mid-2024 and mid-2025. This pack now hedges toward the statute's by-right ADU mandate likely applying to Maricopa, not the reverse, and this pack found no local ordinance yet reflecting HB2720-style standards. Confirm current population figures, state compliance status, and the guest-quarter standards directly with Development Services (520-568-9098) before relying on this. This pack covers the incorporated city only.