Home-sale radon mitigation
Quick installs and a follow-up test result for buyers, sellers and agents.
Radon Mitigation in Clemson, SC
Clemson is a college town where most homes are rentals and houses trade hands often. That makes radon a question for landlords, buyers and sellers, not just the people living there.
Get a Free Quote Call (727) 300-6656Clemson's radon picture
Most of Clemson lies in Pickens County, with a sliver in Anderson County. Both are EPA Zone 2, a moderate rating that still calls for testing. The EPA recommends testing every home regardless of zone.
Pickens County's state test data is striking for a Zone 2 county: an average of 3.0 pCi/L across 726 initial tests, and a highest reading of 48.1 pCi/L. Next door, Oconee County has the highest measured average in South Carolina at 5.0 pCi/L. The foothills geology around Clemson is worth taking seriously. The EPA estimates radon is the leading cause of lung cancer among non-smokers, and you can't see or smell it.
EPA action level: 4 pCi/L. Consider fixing between 2 and 4. The U.S. average indoor level is about 1.3 pCi/L.
Rentals, sales and lake homes
Clemson sits about 27 miles west of Greenville, along Lake Hartwell in the Blue Ridge foothills. Its population was 17,681 in 2020, estimated at 18,941 in 2025. Only about 34.3% of homes are owner-occupied, which reflects the large student rental market.
For landlords, that means people living in a house who never ordered a radon test. For owners selling, it means buyers who may ask for one. South Carolina doesn't require radon testing, but the state's property condition disclosure asks sellers about known radon.
Clemson homes range from older houses near campus to newer builds and lake properties. Crawl spaces, slabs and basements all turn up here, and some homes combine two. A combination system for those houses typically runs $2,200–$3,800.
What we offer in Clemson
Radon testing
Short-term professional tests from about $150, good for rentals between tenants.
Sub-slab depressurization
Slab and basement systems, typically $900–$2,500.
Crawl space mitigation
Membrane plus fan, typically $1,500–$3,500.
A running fan typically costs about $30–$300 a year in electricity, with most homes near the low end, a minor line item for a rental.
Get a free Clemson radon quote
Owner, landlord or agent, send us the details. We usually answer the same day.
Clemson radon questions
Should Clemson landlords test rental homes for radon?
It's a sensible step. Pickens County tests averaged 3.0 pCi/L with a high of 48.1 pCi/L, and the EPA recommends testing every home. A short-term test between tenants is easy to schedule. If the result is 4 pCi/L or higher, a system can usually be installed in a few hours.
Does South Carolina require radon disclosure when selling a Clemson home?
South Carolina's Residential Property Condition Disclosure, effective June 2023, asks sellers about known radon gas. No state law requires testing, so sellers disclose only levels they know about. Many buyers test during inspection anyway, which is why a quick install and retest matters near closing.
Is radon higher near Lake Hartwell?
We can't point to lake-specific data. What we can say is that Pickens County averages 3.0 pCi/L and neighboring Oconee County has the highest measured average in South Carolina at 5.0 pCi/L. Lake homes on private wells may also want a water test.
Know your number. Fix it if it's high.
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