1st Defense Radon

Licensed professional: Steve Larsen

1st Defense Radon holds Minnesota Department of Health radon mitigation license RMITS-00063 and is registered in Cottage Grove. MDH lists the services offered as: single family mitigation, single family measurement. Published service area: 50 miles. This license appeared on the MDH service provider list at our last weekly check.

On the current MDH listRadon mitigation license

License number	RMITS-00063
License type	Radon mitigation
Licensed professional	Steve Larsen
Company	1st Defense Radon
Location on file	9120 Hillside Tr S, Cottage Grove, MN, 55016
Phone on file	(651) 503-3131
Services listed	Single Family Mitigation, Single Family Measurement
Service area	50 miles
First seen on the MDH list	July 7, 2026
Last seen on the MDH list	July 8, 2026

Website listed with MDH: firstdefenseradon.com

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This profile is compiled automatically from the Minnesota Department of Health's public radon licensing list. It is public information, not a review, rating, or endorsement, and absence of a flag is not a guarantee. Verify current licensure with MDH before signing anything.Checked against the MDH list: July 8, 2026.