Do You Need a Permit for a Radon Mitigation System? in Verenigde Staten
Sometimes. Many US states and European countries require contractor licensing for radon mitigation, and some jurisdictions require permits for sub-slab depressurization systems that penetrate the building envelope. The work involves drilling through foundation slabs, installing PVC piping, and wiring an exhaust fan — any of which may independently trigger building or electrical permits. In areas with high radon concentrations, post-installation testing is often mandatory.
Do you need a permit?
Sometimes
- Permitting authority
- State radon program + local building department
- Typical fee
- $0–$300
What triggers a permit
- Penetration through the foundation slab for sub-slab depressurization piping
- Penetration through the roof or exterior wall for exhaust vent piping
- New dedicated electrical circuit for the radon fan (typically 110V/15A)
- State or local requirement for a licensed radon mitigation contractor
- Post-installation radon testing required by local health department
Country-specific detail
In the US, radon mitigation permit requirements vary significantly by state. Some states (such as Illinois, New Jersey, and Ohio) require both contractor licensing through a state radon program and a building or mechanical permit for the installation. Others treat sub-slab depressurization as routine mechanical work that does not require a separate permit, though the electrical circuit for the fan may still need an electrical permit. The EPA recommends following ASTM E2121 (Standard Practice for Installing Radon Mitigation Systems) and the AARST-ANSI RMS-MF standards. Post-mitigation testing to verify radon levels below 4 pCi/L is standard practice and required in some states. Many states maintain a registry of certified radon mitigators.