5 rules for unincorporated Coconino County, Arizona.
Verified from official government sources
Under Arizona HB 2928 (A.R.S. §11-810.01), Coconino County must allow at least one attached and one detached accessory dwelling unit on any single-family lot, plus a third detached unit on parcels of one acre or more.
A.R.S. §11-810.01 (county accessory dwelling units)
At least one attached and one detached accessory dwelling unit as a permitted use.
Coconino County exempts a detached accessory structure of 200 square feet or less from a building permit, but it must still meet zoning setbacks. Larger sheds need permits and roofs engineered for the local snow load.
Converting a garage into living space in Coconino County is a change of occupancy needing a building permit under the 2018 IRC. Add a kitchen and separate entrance and it becomes an accessory dwelling under A.R.S. §11-810.01.
A carport is an accessory structure in Coconino County and generally needs a building permit under the 2018 IRC, with the roof engineered for the area's ground snow load and compliance with zoning setbacks.
In Coconino County, a tiny home on a permanent foundation is a dwelling built to the 2018 IRC and can qualify as an accessory dwelling under A.R.S. §11-810.01, while a tiny home on wheels is an RV that cannot be a permanent residence on a standard residential lot.
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