Radon Testing and Mitigation in Northern Colorado
A high radon reading, a home sale, or a lease question does not have to stall your plans. We connect Northern Colorado homeowners and landlords with independent, Colorado-licensed radon professionals across Larimer and Weld Counties. It is free for homeowners.
Larimer and Weld Counties sit in EPA Radon Zone 1, the highest radon-potential category.
Tell us about your radon project
We route your request to a Colorado-licensed professional near you.
How it works
Step 1
Tell us your situation
Share your city, whether you are a homeowner, buyer, seller, landlord, or tenant, and your test result if you have one.
Step 2
We match you
We connect you with an independent, Colorado-licensed radon professional who works in Larimer or Weld County.
Step 3
Get your quote
The licensed professional tests, interprets your reading, and quotes mitigation. You choose whether to proceed.
Why radon matters in Northern Colorado
Radon is a naturally occurring radioactive gas that seeps up from Colorado's soil and rock. According to the EPA, radon is the leading cause of lung cancer among people who do not smoke. You cannot see or smell it, so testing is the only way to know your level.
Larimer and Weld Counties are both classified as EPA Radon Zone 1, the highest radon-potential category. Statewide, about half of Colorado homes test above the action level, according to the Colorado Department of Public Health and Environment. The EPA recommends fixing homes at 4.0 pCi/L or higher.
Colorado licenses radon professionals
Since 2022, Colorado has required a state license for people who perform radon measurement and mitigation for pay (HB21-1195, administered by the state Division of Professions and Occupations). Paid radon work by an unlicensed person is not allowed.
That protects you, and it is easy to check. Verify any contractor's license on the DORA radon professional lookup before work begins. Every professional we match you with is independent and state-licensed. The license belongs to that professional. NoCo Radon Pros is a matching service and does not hold a radon license.
Common reasons people reach out
A high test during a home sale
Radon often surfaces during inspection. Colorado's disclosure law (SB23-206) applies to residential sales, and deadlines move fast. See radon mitigation at home sale.
A landlord or lease question
SB23-206 also covers leases and gives tenants specific rights. Landlords have a page of their own: radon mitigation for rentals.
An elevated reading at home
Tested at or above 4.0 pCi/L? A licensed professional can confirm and quote a system. Start with radon mitigation.
New construction or a first test
Buying new, or never tested? Begin with radon testing, then read test results explained.
What radon mitigation costs here
For most Northern Colorado homes, a mitigation system runs between $1,000 and $2,500, with around $1,500 being common for a standard sub-slab system. Crawl space and multi-foundation homes cost more, roughly $2,000 to $5,000. Price depends on your foundation, home size, and radon level. For the full breakdown, read the Colorado radon mitigation cost guide.
Radon services we help you with
Cities we serve across Larimer and Weld
We connect homeowners and landlords with licensed radon professionals throughout Northern Colorado, including Fort Collins, Loveland, Greeley, and Windsor. See every city on the service areas page.
Get matched with a Colorado-licensed radon professional
Free for homeowners. Tell us your situation and we will connect you with an independent, licensed professional in Larimer or Weld County. Curious how a free service works? Read how we make money.
Frequently Asked Questions
Does NoCo Radon Pros do the radon work?
No. We are a free matching service, not a contractor. We connect you with an independent, Colorado-licensed radon professional in Larimer or Weld County. That professional holds the state license, does the testing or mitigation, and quotes your project. We do not hold a Colorado radon license.
What does radon mitigation cost in Northern Colorado?
Most standard sub-slab systems run between $1,000 and $2,500, with around $1,500 common. State health figures put the typical range at $1,000 to $2,000, and some Fort Collins installers advertise flat rates near $1,200. Crawl space and multi-foundation homes run higher, roughly $2,000 to $5,000. Your price depends on foundation type, home size, and radon level, so the licensed professional quotes it after seeing your home.
What radon level requires action?
The EPA recommends fixing a home at 4.0 pCi/L or higher, and suggests considering action between 2.0 and 4.0 pCi/L. If your test came back at or above 4.0, the next step is a mitigation quote from a Colorado-licensed professional. If you have not tested yet, start with a measurement.
Do I have to disclose radon when I sell or rent in Colorado?
Yes. Colorado law (SB23-206) requires radon disclosure in residential sales and leases, and gives tenants certain rights when a landlord fails to address elevated radon. We connect sellers, buyers, and landlords with licensed professionals who handle transaction and disclosure timelines. See our Colorado radon law guide for the details.
How do I know a radon contractor is licensed?
Colorado licenses radon measurement and mitigation professionals through the state Division of Professions and Occupations. You can verify any contractor on the DORA radon professional lookup before work begins. Every professional we match you with is independent and state-licensed.