Mesa, AZ Accessory Structures: Shed & Carport Rules (2026)

Section 4-1-4(B)(1)(a) of the Mesa Administrative Code lists one-story detached accessory structures ancillary to R-3, R-4, and R-5 occupancies, the city's residential occupancy classes covering one- and two-family dwellings, lodging houses, and similar uses, that serve as tool and storage sheds, playhouses, and similar uses as work exempt from the building permit otherwise required by 4-1-4(A). 60 m2) is measured on floor area, and the exemption only holds if the property isn't subject to the Desert Uplands Development Standards, isn't inside a Historic Preservation Overlay District, and isn't on a site designated as a historic landmark.

A shed that exceeds 200 square feet, or that sits on a lot carrying any of those three designations, falls back into the standard permitting track: an application to the Building Safety Director under 4-1-4(A) before construction begins. As with every exemption listed under 4-1-4(B), skipping the shed permit doesn't authorize work that violates the Mesa Building Code, the adopted technical codes, or any other city ordinance, Title 11 zoning setbacks, accessory-structure placement rules, and lot-coverage limits for the property's district still apply even when no building permit is required.

The exemption is limited to structures ancillary to residential occupancies and does not extend to sheds accessory to commercial or industrial buildings, which remain subject to the standard building permit process.