1 credentialed Colorado radon professional serving Gill, sourced from the Colorado DORA credential rosters and cross-checked against each company's own site. Filter by what you actually need — a mitigation install, a test, or both.
Credential check: every Gill-based contractor below is on a Colorado DORA radon roster (number and roster date on each card). That means they're allowed to do the work, not that they do it well. Check a Colorado license yourself →
Does a radon contractor need a license in Colorado?
Yes. Since July 1, 2022, all radon measurement and mitigation in Colorado must be done by a professional licensed through DORA's Office of Radon Professionals. Measurement licenses start RME- and mitigation licenses start RMT-.