2024 Retaining Wall Cost — Cost To Build Per Foot & By …
Metal steel retaining wall and steps COR-TEN steel retaining wall cost. A COR-TEN® steel retaining wall costs $35 to $135 per square foot installed. This weathering steel forms a protective rust coating that's maintenance-free. COR-TEN® steel is unsuitable for areas with high humidity, standing water, or near coastlines.