Minnesota radon requirements for new construction

Yes. Minnesota Rules 1303.2400-1303.2403 require a passive radon mitigation system in all new residential buildings statewide. Minnesota adopted IRC Appendix F from the 2006 IRC as a mandatory requirement in June 2009, making it one of the first states to do so.

No. The passive rough-in is required at construction. An active fan is added after occupancy only if testing shows radon levels at or above the action level. The passive system is designed so a fan can be added later without major renovation.

Reviewers check for a gas-permeable layer and vapor barrier below the slab, a vent pipe shown with correct sizing and routing, and an exterior termination point. Minnesota is EPA Zone 1 across most of the state, so plan reviewers treat radon rough-in details as a standard checklist item.

No. Minnesota law explicitly exempts the installation of radon control systems in newly constructed homes prior to a certificate of occupancy from the state's professional licensure requirement. This exemption makes new construction the clearest safe-harbor category under Minnesota radon law.