Shed permit rules in Avondale, AZ — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Avondale's Zoning Ordinance treats sheds as detached accessory buildings. Under Section 28-133, they cannot be placed in a front yard, may not exceed 15 feet in height when accessory to a residence, and count toward maximum lot coverage. Sheds in the rear half of a lot may encroach into required rear and side setbacks.
Sheds and other detached accessory buildings in Avondale are governed by Chapter 28, Article 7 (Supplementary Regulations) of the Zoning Ordinance. Section 28-133 provides that detached accessory buildings shall not be permitted within a front yard. A shed placed in the rear half of a lot may encroach into required rear and side yard setbacks, except as otherwise provided for ADUs under Section 28-33, while one in the front half must meet the dwelling's required yards. On corner lots, accessory buildings must keep a minimum 10-foot setback from property lines, and in the AG (agricultural) district they need 20-foot setbacks from rear and side lines. Section 28-133(e) caps the height of any building accessory to a residence at 15 feet, and Section 28-133(f) provides that all accessory buildings count toward the maximum allowable lot coverage on the lot. The ordinance does not state a maximum square footage for sheds; lot-coverage limits effectively cap total accessory floor area. Many small storage sheds may not need a building permit, but homeowners should confirm permit thresholds with Avondale Development Services and check HOA rules, which often add their own size, color, and placement restrictions.
A shed placed in a front yard, exceeding 15 feet in height, or pushing total structures over the lot's maximum coverage is a zoning violation enforced by Avondale Code Compliance. The City may require relocation, height reduction, or removal of the non-conforming structure.
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