Do I Need a Permit to Install a Radon System in Wisconsin?
Radon mitigation systems may require a building permit depending on the municipality. The installer should be certified by NRPP or NRSB.
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
Do I need a permit for radon mitigation?
Some Wisconsin municipalities require a building permit for radon mitigation systems. Even where not required, using a certified radon mitigator is strongly recommended.
How much does radon mitigation cost in Wisconsin?
Sub-slab depressurization systems typically cost $800-$2,500 installed. The average is around $1,200.
Is radon a problem in Wisconsin?
Yes. Wisconsin has elevated radon levels in many areas, especially in counties with glacial deposits. The EPA recommends testing every home and mitigating if levels exceed 4 pCi/L.
Building in multiple cities?
See permit requirements for any Wisconsin municipality instantly. Compare fees, timelines, and processes side by side across your active jurisdictions.