The answer to 'average cost of retaining wall installation' is that the typical range can vary significantly, depending on several factors. Retaining wall installation costs can range anywhere from $10 to $50 per square foot, with the average being around $25 to $35 per square foot for most residential projects.
The final cost will depend on the size and height of the wall, the materials used (such as concrete, stone, or treated lumber), the complexity of the project, the soil conditions, and your location. Factors like accessibility, permits, and labor costs in your area can also impact the overall price. Getting multiple quotes from local landscaping companies is essential to determine the most accurate cost for your specific project.