Do I Need a Permit to Install a Septic System in Wisconsin?
Septic system (POWTS) installation requires a county sanitary permit, soil testing, and must be performed by a licensed installer.
Yes, you typically need a permit. Requirements vary by municipality. Check with your local building department for specifics.
Where to Apply
Permit requirements, fees, and processing times vary by municipality. Check the specific requirements for your location:
Browse all jurisdictions →Frequently Asked Questions
Who issues septic permits in Wisconsin?
County zoning/land conservation departments issue POWTS permits. A soil evaluation by a licensed soil tester is required before the permit is issued.
How much does a septic system cost?
Conventional systems cost $10,000-$20,000. Advanced treatment systems (mound, ATU) can cost $20,000-$40,000 depending on site conditions.
Can I install my own septic system?
No. POWTS installation must be performed by a DSPS-licensed master plumber or POWTS installer.
Building in multiple cities?
See permit requirements for any Wisconsin municipality instantly. Compare fees, timelines, and processes side by side across your active jurisdictions.