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. Get radon testing and mitigation priced anywhere in Larimer and Weld Counties, free for homeowners.
Your request goes straight to an independent, Colorado-licensed radon professional serving Northern Colorado, usually within about an hour during the day, not a national lead list.
Larimer and Weld Counties sit in EPA Radon Zone 1, the highest radon-potential category.
Get a free radon quote
Tell us about the home and what the job is. It takes about 20 seconds.
How it works
Step 1
Tell us your situation
Four things: your name, your phone number, your city, and what the job is. It takes about 20 seconds.
Step 2
A licensed pro picks it up
An independent, Colorado-licensed radon professional who works Larimer or Weld County takes it from there.
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. The license belongs to the professional doing the work. NoCo Radon Pros is a referral 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. If a rental tests at or above 4.0 pCi/L, mitigation is the fix, and the quote is free.
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 to find out where your home stands.
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. See how those systems are built and what drives the price on our radon mitigation page.
Radon services in Northern Colorado
Radon service areas across Larimer and Weld
Radon testing and mitigation reach homeowners and landlords throughout Northern Colorado, including Fort Collins, Loveland, Greeley, Windsor, and the smaller towns across Larimer and Weld Counties. Use the Service Areas menu above to open the page for your city.
Get a free radon quote
Free for homeowners. Tell us your situation, and an independent, licensed professional in Larimer or Weld County prices the job at no cost to you.
Frequently Asked Questions
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. Licensed professionals handle testing and mitigation on 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. The professionals who do this work are independent and state-licensed.
What happens after you send it
- How fast will someone get back to me?
- Your request goes to an independent, Colorado-licensed radon professional, usually within about an hour during the day. That professional then contacts you to look at the home and give you a fixed bid on their own schedule.
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