Accessory Dwelling Units and HB 2720 in Arizona

Abstract

Signed into law on May 21st, 2024, Arizona House Bill 2720 requires that Arizona cities with at least 75,000 residents adopt regulations to legalize construction of accessory dwelling units (ADUs) on residential parcels. The bill aims to provide more flexibility for property owners to develop accessory units, eventually increasing housing options and the number of housing units across the state. This bill provides standard regulations for ADUs in Arizona, which requires the affected cities to update their zoning ordinances to comply with the law. Arizona is following other states that have passed statewide ADU legislation. In addition to Arizona, thirteen states have passed ADU legislation that preempts local ADU regulations, including California, Colorado, Oregon, Rhode Island, and Vermont. The purpose of this fact sheet is to provide a summary of the HB 2720 requirements and a comparison with preexisting regulations of the Arizona cities impacted by the legislation.