A retaining wall is treated as a wall/structure under the county Zoning Regulations rather than an exempt residential fence. Only chain-link, wood, or vinyl residential fences are permit-exempt under Sec. 7.8; a retaining wall requires a building permit and must meet the Florida Building Code plus county setback and height
Section 7.8's permit exemption covers only chain-link, wood, or vinyl residential fences; it does not extend to walls generally, so a retaining wall falls under 'all other fences and walls' and requires a building permit. Retaining walls must be engineered to the Florida Building Code, which the county administers, and taller walls typically require signed-and-sealed engineering. The wall height rules of Sec. 7.8 (8 feet at side/rear, tiered heights in a street yard) apply to walls as well as fences, and the wall must sit on the owner's property without blocking drainage or encroaching easements. Coastal, floodplain, and Siesta Key Overlay properties can carry added review. Confirm requirements with Sarasota County Building Services before construction.
An unpermitted retaining wall, or one that fails Building Code or zoning standards, is a violation. The county may require an after-the-fact permit, engineering, correction, or removal, with escalation to the Code Enforcement Special Magistrate and daily fines for non-compliance.
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