The Osceola County Land Development Code does not set a separate retaining-wall height standard. Retaining walls are regulated as structures under the Florida Building Code and county permitting, and typically need a building permit and engineering when they retain significant grade. Confirm with the Building Division.
Osceola County's LDC addresses fences, walls used as screening, and buffers, but sets no distinct dimensional rule for grade-retaining walls. Retaining walls are treated as structures governed by the Florida Building Code, which the county administers. Walls above the FBC threshold generally require a building permit and engineered drawings, and must not divert stormwater onto neighboring parcels. Where a wall also functions as a fence, the LDC 3.3.1(C) fence standards (front-yard height, materials) may additionally apply. Always verify the specific permitting threshold with the Osceola County Building Division before construction.
Building an unpermitted retaining wall can result in a stop-work order and Code Enforcement penalties; drainage impacts onto neighbors may create civil liability.
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