The letter r is in a green square on a white background.
  • HOME
  • SERVICES
    • RADON TESTING
    • RESIDENTIAL RADON TESTING
    • RADON MITIGATION SYSTEM INSTALLATION
    • RADON MITIGATION SYSTEM REPAIR
    • CONTINUOUS RADON MONITORING
    • PRE-PURCHASE REAL ESTATE RADON INSPECTIONS
    • POST-MITIGATION TESTING
    • CRAWL SPACE SEALING & ENCAPSULATION
    • SUMP PIT & DRAIN SEALING
    • RADON SYSTEM UPGRADES & MAINTENANCE
    • COMMERCIAL RADON TESTING
  • ABOUT
    • AREAS WE SERVE
    • REVIEWS
    • FAQS
  • GALLERY
  • CONTACT
Cottage Grove, MN
651-503-3131
  • HOME
  • SERVICES
    • RADON TESTING
    • RESIDENTIAL RADON TESTING
    • RADON MITIGATION SYSTEM INSTALLATION
    • RADON MITIGATION SYSTEM REPAIR
    • CONTINUOUS RADON MONITORING
    • PRE-PURCHASE REAL ESTATE RADON INSPECTIONS
    • POST-MITIGATION TESTING
    • CRAWL SPACE SEALING & ENCAPSULATION
    • SUMP PIT & DRAIN SEALING
    • RADON SYSTEM UPGRADES & MAINTENANCE
    • COMMERCIAL RADON TESTING
  • ABOUT
    • AREAS WE SERVE
    • REVIEWS
    • FAQS
  • GALLERY
  • CONTACT

gallery

Basement utility room with a white laundry sink, exposed pipes, a ladder, and a black panel leaning against the wall.
Button
Ladder and PVC pipes in a home repair area beside a patched wall with exposed drywall and tools on the floor
Button
White house exterior with gray trim, bay window, and side garden under a cloudy sky
Button
Basement utility area with a blue step ladder under exposed pipes and electrical panels.
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button

Contact

651-503-3131

Cottage Grove, Minnesota

Mon - Sat
7:00 am - 9:00 pm
Sunday
7:00 am - 7:00 pm

Quick Links

  • HOME
  • AREAS WE SERVE
  • REVIEWS
  • GALLERY
  • FAQS
  • CONTACT

Services

  • RADON TESTING
  • RESIDENTIAL RADON TESTING
  • RADON MITIGATION SYSTEM INSTALLATION
  • RADON MITIGATION SYSTEM REPAIR
  • CONTINUOUS RADON MONITORING
  • PRE-PURCHASE REAL ESTATE RADON INSPECTIONS
  • POST-MITIGATION TESTING
  • CRAWL SPACE SEALING & ENCAPSULATION
  • SUMP PIT & DRAIN SEALING
  • RADON SYSTEM UPGRADES & MAINTENANCE
  • COMMERCIAL RADON TESTING
1st Defense Radon Testing And Mitigation
 © 2026
Inquire
Call Us