how much does a septic system cost
1 Overall, the cost of septic system can range from $2,000 to $20,000. 2  There are different types of septic system available for installation. 3  Depending on the type and size of septic system that you have installed in your house, the price can be different. If that same septic tank has to be installed in California, the prices can be as much as double that. 2  Higher-end septic tanks that include peat filters and aerobic systems can cost as much as $5,000 to $15,000.