Retaining walls over 4 feet in exposed height in Milwaukee require a building permit, engineered drawings, and must meet the Wisconsin Uniform Dwelling Code setbacks.
Milwaukee requires building permits for retaining walls exceeding 4 feet measured from the bottom of the footing to the top of the wall, or any retaining wall supporting a surcharge load from a driveway or slope. Permit applications must include drawings stamped by a Wisconsin-licensed engineer for walls over 4 feet. Walls must be set back at least 1 foot from the property line and include drainage systems to prevent saturation and frost heave common during Milwaukee winters. Walls holding back the public right-of-way need additional City Engineer review.
Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact Milwaukee code enforcement directly for current fines, enforcement procedures, and hearing options.
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