The answer to 'how much does retaining wall cost' is that the cost can vary significantly depending on several factors. Typically, the cost of a retaining wall can range from $15 to $50 per square foot, but this is just a general guideline. The actual cost will depend on the size and complexity of the project, the materials used, the terrain, and the location.
Factors that can influence the cost of a retaining wall include the height and length of the wall, the type of material used (such as concrete, stone, or wood), the soil conditions, and the accessibility of the site. Taller walls, more complex designs, and difficult terrain can all increase the overall cost. Additionally, the cost of labor and any necessary permits or inspections can also affect the final price.