Accessory Structures in Coconino County, AZ (2026)

2 rules for unincorporated Coconino County, Arizona.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Coconino County. If you live within an incorporated city, that city's own rules apply: see the city list below.

ADU Rules

Coconino County allows one attached and one detached accessory dwelling per lot, capping the standard unit at 600 square feet regardless of lot size and letting larger units grow to 75 percent of the main home's floor area, up to 1,000 square feet detached or 1,200 square feet attached. Detached units must sit 200 to 500 feet from the main house and meet a 5-foot side and rear setback.

Coconino County Accessory Dwelling Unit Rules

Some Restrictions

Coconino County Zoning Ordinance § 3.4

3.4.C. Performance Standards Approval of Accessory Dwellings shall require compliance with the following performance standards: 1. One attached and one detached Accessory Dwelling is permitted per Lot. Lots over one acre in size are permitted a second detached Accessory Dwelling if the second detached Accessory Dwelling is deed restricted to limit to either personal residential use or or renta...

Full ordinance details →Official source ↗

Shed & Carport Rules

A detached shed or accessory structure in unincorporated Coconino County must meet the same setbacks as the main house along the front and street side lines. Section 4.5.C.5 lets a structure of 600 square feet or less and no taller than 15 feet sit as close as 5 feet to an interior side or rear property line.

Coconino County Shed & Accessory Building Rules

Some Restrictions

Coconino County Zoning Ordinance § 4.5.C.5

5. A detached Accessory Structure, including Distributed (Individual) Renewable Energy Systems in Residential Zones, regardless of the requirements for Building Permits, shall meet all Setback and separation requirements for the underlying zone except as provided herein: A. A detached Structure shall meet the Setback requirements of the main Building for the Front and Street Side Setbacks. B. A...

Full ordinance details →Official source ↗

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