average septic system price
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. The cost to install a septic system can vary by thousands of dollars based on these different factors. 2  The geographical location can play a rather big role. 3  For instance, a septic tank that has to be installed in Iowa can cost $3,000 to $6,000 for a standard install.