2024 Retaining Wall Cost — Cost To Build Per Foot & By …
The average cost to build a retaining wall is $20 to $50 per square foot or $40 to $300 per linear foot. ... COR-TEN® steel is unsuitable for areas with high humidity, standing water, or near coastlines. Install a concrete or wooden wall faced with a thin layer of Corten steel to save up to 50% of the cost.