Septic System Costs in Wisconsin (2026)

Based on BLS wage data, septic system in Wisconsin costs an average of $8,140, ranging from $7,745 to $8,686.

Wisconsin Average $8,140

Septic System Costs by City in Wisconsin

Reviewed by

Alex Johnson, P.E.

Mechanical Engineer • 15+ Years Home Repair Experience • Licensed Contractor

All cost data on this page has been verified against BLS and Census Bureau records. See our methodology →