What the county actually requires, who to call, and where people get caught out.
Extremely rural with historically thin enforcement (it ran on 2006 codes until late 2024), but its new Building Code Ordinance 2024-02 (2018 IRC/IBC, effective Sept 5, 2024) is tighter than the IRC default on paper — the shed exemption was cut from 200 to 120 sq ft (non-habitable, floor no more than 30 inches above grade, approved setbacks), even 'exempt' structures require a $20 site-plan review for zoning/floodplain compliance, and all containers/park models/RVs need placement permits — with no owner-builder opt-out.
Call the office above and describe your actual build. Two things catch dome builders out in every Arizona county, whatever the permit light says: septic is regulated by the state regardless of what the county does about buildings, and no permit means no certificate of occupancy — which usually means no conventional mortgage and no standard homeowner's insurance, and a cash-buyers-only sale later.
Snow load is the other one. At elevation in Arizona it is a real engineering number, not a formality — the calculator works it out for your site.
Work out your dome's struts, hubs and cost →
This is a plain-English summary of published county rules, gathered for Tom & Courtney's Desert Domes — it is not legal advice, and codes change. The county office above is the authority; confirm with them before you buy materials.