The answer to the cost of a drainage system is that it can vary widely depending on several factors. Typically, the cost of a residential drainage system can range from $2,000 to $10,000 or more, depending on the size of the property, the complexity of the drainage needs, and the materials and labor required.
Some key factors that influence the cost of a drainage system include the size and layout of the property, the type of drainage system (e.g., surface drainage, underground drainage, or a combination), the depth and length of the drainage pipes, the need for additional features like catch basins or French drains, and the cost of labor in your local area. Professional installation by a licensed landscaper or plumber is usually recommended to ensure the system is designed and installed correctly.