Home-sale radon mitigation
Fast scheduling and a post-install test result you can hand to the other side.
Radon Mitigation in Duncan, SC
Duncan sits right on I-85 between Greenville and Spartanburg, with a growing population and homes changing hands often. If you're buying, selling or just curious, we'll help you find and fix radon.
Get a Free Quote Call (727) 300-6656Radon risk around Duncan
Duncan is in Spartanburg County, rated Zone 2 on the EPA radon map. Greenville County, a few miles west, is the state's only Zone 1 county. Being one county over doesn't mean your house is in the clear.
State radon program data for Spartanburg County shows an average of 2.6 pCi/L across 1,136 initial tests, with a highest result of 41.0 pCi/L. The EPA recommends fixing at 4 pCi/L or above and considering a fix from 2 to 4 pCi/L. It also recommends testing every home, no matter which zone it's in.
South Carolina offers one free radon test kit per home while supplies last at des.sc.gov/radon. It's a fine starting point. For a real estate deadline, a professional test is usually the better choice.
A small town with a big employer base
Duncan is home to about 4,041 people, up roughly 27% since 2010. It's also home to the U.S. headquarters of companies like Stäubli, Röchling and Dräxlmaier, which keeps the area busy and the housing market moving.
When homes sell often, radon comes up often. South Carolina's Residential Property Condition Disclosure asks sellers about known radon. No state law requires a radon test, but many buyers ask for one during inspection. When a number comes back above 4 pCi/L, the deal usually turns on how quickly someone can install a system and retest.
Duncan homes include slabs, crawl spaces and some basements, so we look at each foundation before we quote.
Services in Duncan
Radon testing
Short-term professional tests, from about $150.
Sub-slab depressurization
For slab and basement homes, typically $900–$2,500.
Crawl space mitigation
Sealed membrane plus fan, typically $1,500–$3,500.
Our prices are typical ranges, and the final number comes after we see the house. Read radon and home sales in South Carolina for more on who usually pays.
Get a free radon estimate in Duncan
On a closing deadline? Say so in the form and we'll prioritize scheduling. Most messages get a same-day reply.
Duncan homeowner questions
Is Duncan in Greenville County's Zone 1?
No. Duncan is in Spartanburg County, which the EPA rates Zone 2. Greenville County is the only Zone 1 county in South Carolina. Still, Spartanburg County tests averaged 2.6 pCi/L and reached 41.0 pCi/L, so the EPA's advice to test every home applies in Duncan too.
I'm selling my Duncan home and the buyer's radon test came back high. What now?
Ask for the full test report and contact us for a quote. Most systems install in a few hours, and we run a follow-up test afterward so both sides can see the new level. Who pays is negotiated between buyer and seller; South Carolina doesn't require testing or mitigation.
How much does a radon system cost in Duncan?
Typical ranges are $900 to $2,500 for a slab or basement system and $1,500 to $3,500 for a crawl space system. Homes with both foundation types usually run $2,200 to $3,800. These are estimates; your written quote follows a free on-site look.
More towns near Duncan
Right up and down I-85 from Duncan.
Know your number. Fix it if it's high.
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