Arlington Heights requires permits for retaining walls above a certain height. Walls over 4 feet typically require engineered plans. Retaining walls must be designed to handle drainage and soil loads without affecting neighboring properties.
Retaining walls in the Village of Arlington Heights require a building permit when they exceed 4 feet in height measured from the bottom of the footing to the top of the wall. Walls over 4 feet must include engineered structural plans stamped by a licensed Illinois professional engineer. Retaining walls of any height that support a surcharge load (such as a driveway, structure, or slope above) may also require engineering. The wall design must address drainage behind the wall to prevent hydrostatic pressure buildup, typically through weep holes or drain tile. Walls must not redirect stormwater onto neighboring properties. Setback requirements may apply depending on the wall location and zoning district. An inspection is required before backfilling. Contact Community Development at (847) 368-5200 for permit requirements.
Building a retaining wall without required permits may result in stop-work orders and fines. Non-engineered walls that fail may create liability for damage to neighboring properties.
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