Drennen Custom Contracting

General Contractor, Contractors

608 E Trilby Rd, Fort Collins, CO 80525
(970) 510-9138

Tips & Reviews for Drennen Custom Contracting

accepts credit cards drennen custom contracting is the leading certified radon mitigator in northern colorado. we specialize in real estate transactions and most radon systems can be installed in one day or less. drennen custom contracting also provides personalized roofing services including estimates, inspections ...

  • Feb 2023

    Rafe and his colleague did a great job of installing the radon remediation system for my house. Towards the end of the installation, Rafe gave me a clear and thorough description of how the system works, how to monitor it, and how to troubleshoot it for common problems (e.g., thrown circuit breaker). In addition to the great installation, Drennan beat a competitor's quote by > $1,000. I'm impressed and happy to recommend them here.

  • Feb 2023

    We purchased a home in fall that popped for elevated levels of radon during the inspection. The home sellers are in construction and referred us to Drennen for a radon mitigation system. We had them out for an initial quote and they were prompt to schedule, on-time, and patient with questions.Naturally, we wanted to get another opinion/quote but they were the only recommendation from multiple home owners and real estate agents that we know. Install was a breeze, the system looks great, and the team was super considerate of our home and took the time to explain how the systems works. We are super happy - thanks Drennen!

  • Oct 2022

    Drennen Custom Contracting recently replaced our old Radon Mitigation System and did an excellent, professional job. Their two employees arrived on time and completed the new installation in a very satisfactory manner. The old system was removed quickly, with the new ducts, electrical connections and fan equipment added with efficiency and cleanliness.We highly recommend Drennen for Radon Mitigation systems.



Monday: 8:30AM - 4:30PM
Tuesday: 8:30AM - 4:30PM
Wednesday: 8:30AM - 4:30PM
Thursday: 8:30AM - 4:30PM
Friday: 8:30AM - 4:30PM
Saturday: ClosedSunday: Closed


Google Google: 4.9/5 Facebook Facebook: 5/5 BBB BBB: A+ Nextdoor Nextdoor: 71 ❤️

Drennen Custom Contracting

608 E Trilby Rd, Fort Collins

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