HB2928 expands Arizona’s state-level rules for accessory dwelling units (ADUs) and short-term rentals. For municipalities over 75,000 people and for counties statewide, the bill requires local governments to allow at least one attached and one detached ADU on lots where a single-family home is allowed, with an additional detached ADU allowed on parcels of one acre or more if one unit is deed-restricted affordable. It also caps certain ADU size limits, bars local governments from imposing requirements such as extra parking, familial relationships, matching exterior design, or more restrictive setbacks than those applied to single-family homes, and limits when restrictive covenants can be required. The bill preserves building, fire, health, environmental, wildfire, drainage, flood-control, and utility-easement protections, and it creates a default rule allowing ADUs without limits if a county or qualifying municipality fails to adopt required regulations by the statutory deadline.
The bill also strengthens Arizona’s preemption framework for vacation rentals and short-term rentals. Cities and counties may not prohibit these rentals, but they may regulate them for health and safety, nuisance, zoning, permit/licensing, notice to neighbors, insurance, emergency contact information, and certain prohibited uses such as sex-offender housing, sober living homes, adult-oriented businesses, and nonresidential event or commercial uses. The bill sets permit-processing deadlines, limits the information local governments may require, authorizes civil penalties and permit suspensions for repeated or serious violations, and requires owners to cease operations if they fail to apply for required local permits within 30 days after the process becomes available.
HB2928 also amends Arizona’s administrative review and approval statute for city and town development processes. It requires municipalities to use administrative, rather than public-hearing, review for certain site plans, plats, lot adjustments, and objective design review standards, and it authorizes self-certification programs for licensed architects and engineers on qualifying projects. Historic districts and historically designated areas are excluded from these administrative-review requirements. The bill’s effective date for the amended administrative-review section is December 31, 2025.
The overall sentiment reflected in the votes was generally favorable, with the bill advancing through both chambers by comfortable margins. It received committee support in the House and Senate, passed House third reading 50-6, and passed Senate third reading 21-6 before House concurrence passed 48-7. That pattern suggests broad legislative support for expanding housing supply and standardizing local regulation, while still leaving a minority of lawmakers opposed.
The main points of contention appear to center on state preemption of local land-use authority. Critics likely objected to the bill’s limits on municipal and county discretion over ADU placement, parking, setbacks, design standards, and short-term rental regulation, as well as the mandatory permitting timelines and penalties. Supporters, by contrast, appear to have favored the bill as a housing-supply and regulatory-streamlining measure that promotes ADU construction, clarifies short-term rental rules, and reduces local barriers to development.
HB2928 amends multiple Arizona statutes governing municipal and county planning, accessory dwelling units, short-term rentals, and administrative development review. It expands statewide minimum ADU allowances, restricts local zoning and design requirements, and creates fallback rules if local governments do not adopt compliant regulations. It also reinforces state preemption over vacation and short-term rentals while preserving limited local authority over safety, nuisance, permitting, and enforcement. In addition, it requires cities and towns to use administrative approval for certain development actions and authorizes self-certification for some projects, thereby reducing the role of public hearings in specified land-use decisions.
The bill appears to have been broadly supported in both chambers, with strong majority votes at third reading and committee approval in the House and Senate. The vote pattern suggests lawmakers generally viewed the measure favorably as a housing and regulatory-reform bill. The relatively small number of dissenting votes indicates some opposition remained, likely from members concerned about local control and the scope of state intervention in zoning and rental regulation.
The primary contention is the bill’s preemption of local authority. Municipalities and counties lose discretion to impose many common ADU conditions, such as parking minimums, design matching, larger setbacks, and restrictive covenants, and they must allow specified ADUs even if local regulations are not adopted on time. Local governments also face tight limits on how they can regulate short-term rentals, including permit requirements, penalties, and occupancy rules. Opponents likely objected to these constraints on local planning and neighborhood regulation, while supporters likely argued that the bill is needed to increase housing options, reduce permitting barriers, and create uniform statewide rules.