Board discusses state bill HB 29‑28 requiring more accessory dwelling units; supervisors favor deed‑restriction option for one unit

The Coconino County Board of Supervisors heard a briefing on Arizona House Bill 29‑28 during the Oct. 1 work session and discussed how the county will implement the new state requirement to allow additional accessory dwelling units (ADUs) in residential zoning.

What the law requires and staff explanation Community Development staff told the board that HB 29‑28, enacted in May, requires counties to permit additional ADUs in single‑family residential zones: at least two ADUs (one attached and one detached) on any residential parcel, and on parcels 1 acre or larger the county must allow an additional (third) ADU (detached). "HB 29 28, approved this past May, down in Downstate Capitol," said Jess McNeely, new development staff, explaining the timetable and the county’s obligation to update its zoning ordinance "no later than the end of the calendar year."

County options and administration The state law allows counties to require, by local rule, that the additional detached ADU (the third unit on parcels of 1 acre or larger) be deed‑restricted for affordable housing. The statute defines the affordability…