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Committee gives do‑pass to ADU bill expanding county ability to permit casitas
Summary
House Bill 29‑28, which requires counties to allow accessory dwelling units (ADUs) where single‑family homes are permitted and sets development standards and residency restrictions for short‑term rentals, received a 7‑0 do‑pass recommendation after sponsor and supporters described impacts for multigenerational families.
The Senate Regulatory Affairs and Government Efficiency Committee voted unanimously on March 25 to recommend House Bill 29‑28 for passage. The bill requires counties to adopt regulations allowing accessory dwelling units (ADUs) where single‑family dwellings are permitted, authorizes at least one attached and one detached ADU and allows an additional detached ADU on parcels one acre or larger.
Sponsor and proponents described the bill as a cleanup and extension of a prior casita bill, addressing misinterpretations in some cities and protecting smaller cities under a 75,000 population threshold. Senator Ortiz described constituent stories about multigenerational families and said the bill expands affordable housing options in practice. Jay Kinman (Arizona Neighborhood Project) and other supporters said they worked with county supervisors and achieved neutral positions from some counties.
The committee gave HB29‑28 a do‑pass recommendation on a 7‑0 roll call.
