Serving the Denver metro since 2015 NRPP / NEHA certified · DORA licensed Mon–Fri 7:30am–4:00pm

Radon mitigation in Castle Rock, Colorado

Castle Rock homeowners trust 5280 Radon Mitigation for testing, system installation, and service — with a fixed written price and a test afterward that proves the result.

Local radon, local installers

Castle Rock sits on the Palmer Divide, where the soil and the wind make radon testing especially worth doing before you finish a basement.

We are based in Denver and work Castle Rock every week — for homeowners who tested high, for buyers who need a system before closing, and for families whose fan finally wore out after fifteen years of quiet service.

What we do in Castle Rock

  • Radon testing, including certified 48-hour tests for real estate
  • Sub-slab, crawl space, and block-wall mitigation systems
  • Sealing sumps, drains, and slab penetrations
  • Fan replacement, re-sealing, and service on existing systems
  • Post-installation verification testing

How it works

Call or send the form with your address and any test result you have. We ask a few questions about the foundation, give you a fixed price in writing, and schedule a day — most installations are finished in one day. Colorado permits vary by jurisdiction, and we handle the permit and inspection for Castle Rock as part of the job.

If you are closing on a house in Castle Rock and the inspection turned up an elevated reading, tell us the date. We build the schedule backwards from it.

Request your free estimate

Most requests are answered the same business day.

Your details stay with us — we never sell or share them.

Get a Castle Rock estimate

Fixed price, written down, and usually answered the same business day.