Can you build a geodesic dome without a permit in Mohave County, Arizona?

Q: Can you build a geodesic dome without a permit in Mohave County, Arizona?

Green light. Mohave County exempts detached, non-habitable structures up to 300 sq ft. An owner-builder opt-out exists. Most permissive of the five: the county-adopted exemption threshold is 300 sq ft (larger than the IRC's 200), and on 5+ acres the Section 37.Y Exemption Permit lets an owner build a non-habitable accessory structure of any size fully outside the building code for $75 and a notarized waiver — tailor-made for a dome shed or greenhouse.

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Building a geodesic dome in Mohave County

What the county actually requires, who to call, and where people get caught out.

Green light

There is a real, usable path to building here without a full permit — but it has conditions, and they matter.

Most permissive of the five: the county-adopted exemption threshold is 300 sq ft (larger than the IRC's 200), and on 5+ acres the Section 37.Y Exemption Permit lets an owner build a non-habitable accessory structure of any size fully outside the building code for $75 and a notarized waiver — tailor-made for a dome shed or greenhouse.

Building without a permit: Up to 300 sq ft. Detached, non-habitable, single storey, and normally no electrical, plumbing or mechanical work. A dome that size is a workshop, a shelter, or a proof of concept — not a house you live in.
Owner-builder opt-out: Yes — one exists. Exemption Permit under Zoning Ordinance Section 37.Y (verified from the county's own application): parcel must be 5+ contiguous acres; structure used for NON-HABITABLE residential accessory purposes only (shed/greenhouse/storage fine, living space not eligible); max wall height 10 ft; 30-ft setback from all property lines; notarized Waiver of Claims; $75 fee; plot plan required. A qualifying structure is then exempt from Mohave County building and zoning codes — no size cap, no plan review, no inspections.
Who decides: Mohave County Development Services Department
(928) 757-0903 (Kingman, 3250 E. Kino Ave)
County planning & development

Before you count on any of this

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 →

Other Arizona counties

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.