Radon Mitigation in Spartanburg, SC
Spartanburg County sits in EPA Zone 2, and that label leads a lot of homeowners to skip testing. The county's own test results say that's a mistake. We test and fix radon in Spartanburg homes of every age.
Get a Free Quote Call (727) 300-6656What Spartanburg County radon tests show
The EPA groups Spartanburg County in Zone 2, meaning moderate predicted radon potential. Greenville County next door is Zone 1, the only one in South Carolina. It is easy to read that as "Spartanburg is fine." The numbers tell a more careful story.
South Carolina's radon program logged 1,136 initial tests in Spartanburg County through mid-2022. The average was 2.6 pCi/L, which already falls in the 2 to 4 pCi/L range where the EPA says homeowners should consider fixing. The highest single reading was 41.0 pCi/L, more than ten times the EPA action level of 4 pCi/L.
The takeaway: a county average can't tell you what is under your floor. Two houses on the same street can test very differently. The EPA recommends testing every home, whatever its zone.
Radon is an invisible, odorless gas from uranium breaking down in soil and rock. The EPA estimates it is the leading cause of lung cancer among non-smokers and the second leading cause overall. A test is the only way to know your level.
Older neighborhoods, newer subdivisions
Spartanburg has some of the Upstate's oldest housing. Hampton Heights Historic District is the city's oldest intact downtown neighborhood, and Beaumont Village grew up as a mill village. Northside has its own mix of older and rebuilt homes. Older houses often sit on crawl spaces or partial basements with gaps, cracks and openings that give soil gas an easy path inside.
At the same time, the county keeps building. Spartanburg County issued 3,986 new-home permits in 2025. South Carolina only requires radon-control construction in Greenville County, so new homes here are not required to include a radon pipe or vapor barrier.
With a citywide median home value around $203,700, a mitigation system is a modest cost compared to the home itself, and it can make a sale go smoother.
Radon services for Spartanburg homeowners
Every job starts with a free look at your foundation. Prices below are typical ranges; your written quote comes after we see the house.
- Professional radon testing — short-term tests from about $150.
- Sub-slab depressurization for slab and basement homes, typically $900–$2,500.
- Crawl space radon mitigation with a sealed membrane and fan, typically $1,500–$3,500.
- Home-sale radon help when a buyer's inspection turns up a high number.
After every install we run a follow-up radon test so you can see the level dropped. If you want to know who will be working in your home, we're glad to share the assigned technician's credentials. See radon mitigation cost for the full price table.
Get a free Spartanburg radon quote
Tell us about your home and your test result if you have one. We usually reply the same day.
Spartanburg radon questions
Is radon really a problem in Spartanburg if the county is Zone 2?
Yes, it can be. Zone 2 describes average potential, not your house. Spartanburg County's initial tests averaged 2.6 pCi/L, and one home measured 41.0 pCi/L. The EPA recommends testing every home regardless of zone, and fixing at 4 pCi/L or higher. Consider fixing between 2 and 4.
Do older homes in Hampton Heights or Beaumont Village need a different system?
Often the system is the same idea, just fitted to the foundation. Many older homes have crawl spaces or partial basements, so we may seal the crawl with a membrane and draw air from under it, sometimes combined with a slab suction point. We look at the foundation first, then quote.
Where do I get permits or code questions answered in Spartanburg County?
Spartanburg County Building Codes is at 366 N Church St. South Carolina only requires radon-control construction in new homes in Greenville County, so most Spartanburg homes were built without it. We can explain what your system involves before work starts.
Nearby areas we serve
We also test and mitigate in these Spartanburg County communities.
Know your number. Fix it if it's high.
Free radon mitigation quotes across the Upstate — usually a same-day reply.