The answer to 'average cost of drainage system' is that the cost can vary significantly depending on factors like the size of your property, the complexity of the drainage system needed, and your local labor and material costs. Typical ranges for a basic drainage system for a residential property can be anywhere from $3,000 to $15,000 or more. Factors that influence the cost include the length and depth of drainage pipes, the type of drainage system (e.g. French drain, catch basins, sump pump), and any necessary excavation or landscaping work.
It's essential to get local quotes from licensed and experienced landscaping or drainage contractors to get an accurate estimate for your specific project. They can assess your property's needs and provide a detailed breakdown of the costs. While DIY drainage solutions may seem appealing, complex systems often require professional installation to ensure proper function and avoid potential issues down the line.