The answer to 'how much does retaining wall cost' is that the cost can vary widely depending on several factors. Typical retaining wall costs can range from $10 to $50 per square foot, with most homeowners spending between $2,000 to $15,000 on average. The final price will depend on the size, materials, complexity of the project, and your local labor costs.
Factors that influence the cost of a retaining wall include the wall height, length, and whether it's a simple straight wall or has corners and curves. The type of materials used, such as concrete, stone, or treated lumber, can also significantly impact the price. Additionally, the site conditions, such as the slope of the land and soil type, can affect the necessary engineering and construction requirements.