Serving Greenville, Greer, Simpsonville & the Upstate
Radon Mitigation in Greenville, SC
Got a radon test at or above 4 pCi/L? Get a local radon mitigation system designed for your home's foundation, installed cleanly, and verified with a follow-up test. Free quotes, straight answers, no pressure.
- Basement, slab-on-grade & crawlspace homes
- Real estate deadlines welcome
- Post-mitigation retest recommended on every job
Get a Free Mitigation Quote
What radon mitigation is, and why Greenville homeowners do it
Radon is a colorless, odorless radioactive gas that forms naturally as uranium in soil and rock breaks down. It moves up through the ground and can enter a house through cracks in the slab, gaps around pipes, sump pits, crawlspaces and construction joints. In EPA's Map of Radon Zones, Greenville County is the only South Carolina county in Zone 1, the highest-potential category, where predicted average indoor screening levels exceed 4 pCi/L. EPA stresses that the map can't tell you about any single house, and elevated homes turn up in every zone, so testing is the only way to know. Because a home is usually at slightly lower air pressure than the soil beneath it, the house can act like a gentle vacuum, drawing soil gas inside.
According to the U.S. EPA, radon is the leading cause of lung cancer among non-smokers and the second leading cause of lung cancer overall. The good news is that high radon is a fixable problem. EPA recommends mitigation when a test shows 4 pCi/L or more, and suggests considering it for levels between 2 and 4 pCi/L.
Radon mitigation is the process of permanently lowering radon in your home. In most Greenville-area houses that means installing an active soil depressurization system: a quiet fan and sealed pipe that pull radon from beneath the foundation and vent it safely above the roofline, before it can get into your living space.
Mitigation systems for every Upstate foundation type
Homes around Greenville, Greer and Simpsonville are built on a mix of foundations, and each one is handled differently. A good system starts with understanding how your house is built.
Basements & slab-on-grade
Sub-slab depressurization is the most common approach. A small hole is cored through the slab, a suction pit is created, and PVC pipe connects it to a radon fan that runs continuously. Major cracks and openings are sealed so the system works efficiently.
Crawlspaces
Sub-membrane depressurization covers the crawlspace soil with a durable plastic vapor barrier, sealed at seams and walls, and draws air from beneath it. This is very common in the Upstate, where many homes are built over crawlspaces.
Combination homes
Many houses have a basement plus a slab addition, or a crawlspace plus a garage slab. These may need more than one suction point tied into the system. Your quote will explain exactly what your home needs and why.
Sump pits can also be sealed with an airtight cover and used as a suction point. See how radon mitigation systems work for a deeper look at each system type. Every system includes a manometer (a simple pressure gauge on the pipe) so you can see at a glance that the fan is working.
How our radon mitigation process works
- Share your test result. Call or send the form with your radon number and a little about your home. No test yet? Start with radon testing.
- Home assessment & written quote. We look at the foundation, where pipe can be routed (inside through a garage or closet, or outside along the wall), and where the fan will sit. You get a clear written quote.
- Installation. Most installs are completed in a single day. Openings are sealed, the pipe is routed neatly, the fan is mounted and wired, and the work area is cleaned up.
- Verify with a retest. EPA advises retesting after mitigation. A short-term test, typically run at least 24 hours after the system starts and no later than 30 days after, confirms how far your levels dropped.
- Ongoing peace of mind. EPA also suggests retesting every two years, or after major renovations, to make sure levels stay low.
What to look for in a Greenville radon mitigation contractor
Whoever you hire, these questions help you compare quotes fairly:
- Credentials. Ask whether the installer holds a current radon certification from a national program such as NRPP (National Radon Proficiency Program) or NRSB (National Radon Safety Board), and ask to see it.
- Design explained. A good quote says how many suction points, where the pipe and fan go, and how cracks and the sump (if any) will be sealed.
- Retest included or arranged. You should finish with a test result that proves the system works.
- Warranty in writing. Ask what's covered on the fan and on the system's performance, and for how long.
- Clear pricing. No surprise add-ons after the work starts. Vapor barriers, extra suction points and electrical work should be listed up front.
If a contractor can't answer these questions clearly, keep shopping. We're happy to answer every one of them before you decide.
Radon mitigation service area
We serve homeowners, buyers, sellers and landlords throughout Greenville County and the surrounding Upstate of South Carolina, including:
- Greenville
- Greer
- Simpsonville
- Mauldin
- Taylors
- Travelers Rest
- Easley
- Fountain Inn
- Five Forks
- Spartanburg
- Anderson
- the wider Upstate
Not sure if you're in the area? Call (864) 555-0100 and ask. If we can't help, we'll tell you right away.
Selling or buying a home?
Radon results often show up in home inspection reports with a tight closing deadline. We can turn around a mitigation quote quickly, schedule the install around your timeline, and arrange a post-mitigation test so buyers and agents have documentation in hand.
Already under contract? Mention your closing date when you call or fill out the form.
Radon mitigation FAQs
How much does radon mitigation cost in Greenville, SC?
Price depends on your foundation (basement, slab or crawlspace), how many separate slabs or foundation areas the house has, where the fan and pipe can be routed, and whether a crawlspace needs a vapor barrier. Most single-family homes need one fan system, which keeps cost in the range of a typical home repair. You will get a written quote before any work starts, and the quote is free.
What radon level requires mitigation?
The U.S. EPA recommends fixing your home if radon is 4 picocuries per liter (pCi/L) or higher, and suggests considering a fix between 2 and 4 pCi/L, because there is no known safe level of radon.
What is the difference between radon mitigation and radon removal?
They mean the same thing. Radon mitigation, radon removal and radon reduction all describe lowering indoor radon, most often with a sub-slab or sub-membrane depressurization system that vents soil gas above the roof.
Can I sell a house in Greenville with a radon mitigation system?
Yes. A working system with a recent low test result is generally reassuring to buyers. Keep the install paperwork, fan warranty and post-mitigation test handy. See radon in Greenville real estate deals.
How long does a radon mitigation install take?
Most standard installs in a single-family home are completed in one day. Homes with multiple foundation types or crawlspaces that need sealing can take longer.
Does radon mitigation actually work?
Yes. A properly designed active sub-slab or sub-membrane depressurization system is the method EPA describes as most common and effective, and it can reduce radon levels dramatically. The only way to know your result is to retest after the system is running, which we recommend for every install.
Will the fan be loud or expensive to run?
Radon fans are designed to run continuously. They make a low hum, are usually mounted outside or in an attic or garage away from living space, and use about as much electricity as a light bulb or two, depending on the model.
Do I need to test before I mitigate?
Yes. Mitigation should be based on a test result. If you have not tested yet, start with our radon testing in Greenville. If you already have a result at or above 4 pCi/L, you can go straight to a mitigation quote.
Is radon really a concern in the Upstate?
Yes. In EPA's Map of Radon Zones, Greenville County is the only South Carolina county rated Zone 1 (highest potential), and nearby Spartanburg, Pickens and Anderson counties are Zone 2. Levels still vary from house to house, so EPA recommends testing every home. Read more about Greenville County's radon zone.
I'm buying or selling a house. Can you help?
Yes. Radon often comes up during inspections. We can quote mitigation quickly so the repair can be negotiated and scheduled before closing, followed by a post-mitigation test.
Ready to lower the radon in your home?
Call for a free, no-pressure quote anywhere in Greenville County and the Upstate.
Call (864) 555-0100