Retaining Walls: Corona vs Moreno Valley

Retaining walls in Corona over 4 feet (measured from bottom of footing to top of wall) require a building permit. Walls supporting any surcharge load — sloped soil, driveways, pools, or structures — require permits and engineered design at any height. Hillside areas have additional requirements for terracing and drainage.

Retaining walls over 4 feet in height measured from the bottom of the footing to the top of the wall require a building permit and engineered plans in Moreno Valley. Walls supporting a surcharge such as a driveway or structure above require a permit at any height. Setback and drainage rules apply.