Colorado Radon Mitigation

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Installer Categories: Commercial & Multifamily Radon Crawl Space Radon Systems New Construction / Passive Activation Radon in Water Radon MitigationInstaller Tags: CO DORA NRPP

Colorado Radon Mitigation is a radon mitigation provider based in Castle Rock, CO, credentialed by CO DORA; NRPP. Services listed on its website: Commercial / multifamily, Crawl space / sub-membrane, New construction (RRNC), Radon in water, Radon testing, Real estate / fast turnaround, Sub-slab depressurization, Sump pit sealing / suction.

Address: Castle Rock
Colorado
United States
Phone: (970) 889-4895
Website
Certifications: CO DORA; NRPP
Certification IDs:

CO DORA RMT license 149 (Axel Joseph Asander; Radon Mitigation Professional; expires 05/31/2027) | NRPP 112399-RMS (Axel Asander; Radon Mitigation Specialist; expires October 31, 2027) | NRPP 115256-RMS (Keelan B Tollefson; Radon Mitigation Specialist; expires June 30, 2027)

License Type: Radon mitigation (Colorado licensed radon mitigation professional (DORA); Radon Mitigation Specialist)
Certified Specialists: 2
Services:

Commercial / multifamily; Crawl space / sub-membrane; New construction (RRNC); Radon in water; Radon testing; Real estate / fast turnaround; Sub-slab depressurization; Sump pit sealing / suction

Warranty: 5 years
Warranty Source
Years in Business: “25+ years of experience” (https://coloradoradonmitigation.com/)
Data Sources:

https://apps2.colorado.gov/dora/licensing/lookup/generateroster.aspx (roster RMT, downloaded 2026-11-02) | https://nrpp.info/listings/bl-16069.html | https://nrpp.info/listings/bl-21122.html

Last Checked: 2026-11-02

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