Home Cost Kit

Radon Mitigation System Cost Calculator

A radon mitigation system costs about $2,626 for the common case: a basement, one suction point, and the pipe run up an outside wall. Hiding that pipe inside the house takes it to $4,041, and a crawlspace that needs a sealed liner reaches $5,368. Swapping a worn fan on a system that already exists is $727. Most people asking are mid-sale with a test result in hand, so those figures are the negotiation, not the repair. Priced for Atlanta; enter a ZIP code to reprice every hour.

Estimate the cost for your home

Estimated cost of a radon mitigation system

$2,618

typical · range $1,835 to $3,401 · basement · 1 suction point · one fan

Labour priced at national wages. Enter a ZIP code to price it for your area. 53% of this figure comes from modelled material and equipment prices — each line shows its own uncertainty.

Priced from bls.gov Aug 2026epa.gov Aug 2026how every line is sourced

The one input that changes the answer for you.

What is being done

A house with a white pipe already on it does not need a system. It needs a fan, and those are two different invoices.

The usual answer in an existing house, and the reason the communication test exists.

Sub-slab depressurisation: core the slab, pipe it to a fan outside the living space.

The area of ground the system has to depressurise, not the floor area of the house.

Where the pipe runs

The same fan, the same suction, the same result on the retest. What changes is whether a buyer sees a four-inch white pipe on the front of the house, and whether three more trades have to come and make the inside look untouched.

Up the outside wall and past the eave. Cheap, quick, and you can see it from the street.

Hiding the riser costs $1,474 more here, and almost none of that is pipe: it is a carpenter, a drywall finisher, a painter and a roofer, each charged at your local wage.

The discharge has to finish above the roof line, so every floor is more pipe and more strapping.

Nothing to seal.

The rest of the job

1 / 4

The figure above is already calculated. Each step just makes it more yours, and you can stop at any of them.

What decides this figure

Suction points
1
Modelled reach per point
1,200 sq ft
Fans running continuously
1

How far one point depressurises is our estimate, not anyone’s published figure: for this sub-slab material we model 1,200 sq ft per point, and real houses land anywhere between 900 and 1,600. That is what the two-hour communication test is for: it measures the answer for your slab instead of assuming it.

Cost breakdown by line item
Line itemQtyCostSource
Sub-slab communication test and system design2 technician-hours, 3 where the house has two foundation types (modelled)2hour$92–$99sourced
Core bit wear, pipe boot and polyurethane seal at each suction pointone per suction point, less one where a sealed sump pit serves as the point1each$45–$130estimated±49%
Dust containment sheeting, HEPA vacuum filters and wet-cutting water management1 where the slab is cored1lot$35–$120estimated±55%
Radon technician: build the dust containment and strike it afterwards1 where the slab is cored1lot$35–$37sourced
Schedule 40 PVC riser and manifold, fittings, hangers and rain capexterior: 10 ft + 10 ft per storey + 4 ft above the eave, per riser. Interior: 10 ft per storey + 16 ft for attic offsets and the roof exit. Slab on grade adds 12 ft of horizontal run to reach an outside wall. Plus 14 ft of manifold per suction point beyond one per riser34linear ft$143–$306estimated±36%
Radon fan, mid-range, where the sub-slab material is unknownone per fan where the sub-slab material is unknown or mixed1each$190–$620estimated±53%
U-tube manometer and system label1 per fan1each$11–$24estimated±37%
Backer rod and polyurethane sealant for the perimeter joint, cracks and penetrationsslab perimeter, taken as 4 × √footprint, where sealing is included139linear ft$111–$473estimated±62%
Radon technician: seal the perimeter joint and the slab penetrationsslab perimeter, taken as 4 × √footprint, where sealing is included139linear ft$289–$310sourced
Fan circuit materials: cable, weatherproof box and labelled service switch1 per fan1lot$60–$260estimated±63%
Electrician: power the fan and fit the service switch2 electrician-hours per fan, 3 where the fan sits in an attic (modelled)2hour$118–$127sourced
Radon technician: core, pipe, seal, commission and check the appliances7 h fixed (including a 0.75 h backdraft check) + 3 h per cored point + 1.5 h per crawlspace point + 2 h per exterior riser or 5 h per interior riser + 1 h where a sump lid is sealed (modelled)12hour$554–$595sourced
Performance allowance: priced-in cost of adding a suction point if the first attempt falls shortone per suction point, on a new system1each$25–$70estimated±47%
Post-mitigation test: kit or monitor use and laboratory analysis1 where a post-mitigation test is included1each$35–$130estimated±58%
Return visit to place and collect the test, and issue the report2 technician-hours where a post-mitigation test is included (modelled)2hour$92–$99sourced
Total$1,835–$3,401±30%

Where these numbers come from

Labour rates by area
BLS Occupational Employment and Wage Statistics, May 2025, for hazardous materials removal workers, electricians, roofers, carpenters, drywall installers and painters in your metropolitan area. Retrieved 2026-08-20. Benefit load from BLS Employer Costs for Employee Compensation. BLS publishes no occupation called radon mitigator, so the technician hour is priced at the closest published trade and that substitution is stated rather than hidden.
The reading that decides whether you spend anything at all
The EPA recommends that homes be fixed at 4 pCi/L or more, and that fixing be considered between 2 and 4 pCi/L — EPA, What is EPA’s Action Level for Radon and What Does it Mean?. Whether your county sits in a high-potential area is a separate question, and the EPA answers it county by county in the EPA, Map of Radon Zones. Drawing our own conclusion rather than the EPA’s: the map tells you whether to test, never whether your particular house has a problem. Only a measurement does that. Both retrieved 2026-08-22.
Why the pipe has to finish above the roof
For radon-resistant construction the EPA specifies coarse gravel under the slab, polyethylene sheeting over it, and solid Schedule 40 PVC of three or four inches run to above the roof — EPA, Radon-Resistant Construction Basics and Techniques. A retrofit copies that specification, which is why the riser in this estimate ends above the eave or the ridge and never at a convenient height. Retrieved 2026-08-22.
Why commissioning includes a backdraft check
Depressurising the ground under a house changes the pressure balance inside it on the day the fan is switched on, and an atmospherically vented furnace or water heater is exactly the appliance that notices. Three quarters of an hour of the technician’s fixed block is a combustion-appliance check for that reason. The CPSC, Carbon Monoxide Information Center covers what is at stake. Retrieved 2026-08-22.
What the system is for
CDC, About Radon and EPA, Health Risk of Radon are the two federal sources on why this gas is worth spending money on. We link them as context for the expense and go no further: this page is a cost breakdown, not health advice. Retrieved 2026-08-22.
The crawlspace liner is bought once, not twice
Under a crawlspace the liner is the suction surface, so it is structural to the design and it is priced here. It is also the same plastic over the same ground that an encapsulation buys. Tick “the crawlspace is already encapsulated” in the calculator and the membrane, the sealed vents and their hours drop out, taking this job from $5,368 to $1,843 in the Atlanta model — a $3,525 line that belongs to crawl space encapsulation cost instead. Pricing it in both places is how two honest quotes add up to one wrong number.
An existing sump pit is the cheapest suction point there is
A sump pit is an open shaft into the same gravel layer the fan is trying to depressurise. Left with a loose lid it short-circuits the system; sealed with a gasketed cover it becomes the suction point, and the model then removes a cored hole from the slab rather than adding a line. That is why picking a pit in the calculator can take the total down. If the pump under that lid is also on its way out, it is priced separately at sump pump replacement cost.
Material prices
Modelled estimates, not sourced prices. No public, machine-readable source of US residential material prices exists, and we would rather say so than pretend otherwise. Each line carries its own uncertainty band. How we estimate them.

Contractor overhead and profit applied at 33–43% over direct cost. Data last reviewed 2026-08-22.

What this figure does not include

Encapsulating the crawlspace
This page prices depressurisation: the communication test, the suction points, the pipe, the fan, the manometer and the electrics. Where a crawlspace has to be lined for the system to have a suction surface, that liner is priced here — but only once. If the crawlspace is already encapsulated, or is about to be, the liner, the vents, the rim joist and the dehumidifier belong to /crawl-space-encapsulation-cost and this calculator drops the membrane to zero. It is the same plastic over the same ground, bought once.
Vermiculite insulation and any asbestos-containing material
Coring a slab in a house built before 1980 can mean cutting through nine-inch vinyl tile or its black adhesive, and some crawlspaces and attics hold vermiculite. Neither is budgeted here, at any figure. Both require testing first and licensed specialist work that this estimate does not cover, and putting a low number against that work would be worse than putting none.
Permit fees and state certification
A growing number of states license or certify radon mitigators, and some jurisdictions require a permit for the electrical work. Fees vary by jurisdiction with no national source, so they are excluded and declared rather than averaged into a number that would be wrong everywhere.
The radon test that sent you here
These figures assume you already have a result. The measurement itself — a kit, or a professional test inside a real estate inspection period — is separate work, and it is the cheapest step in the whole sequence.
Clearing out the crawlspace before a liner goes down
A membrane goes over whatever is already on the crawlspace floor. Removing debris, old torn sheeting, rubble or standing water, and fixing the drainage that put the water there, is separate work and can cost more than the mitigation system itself.
Running the system: electricity and fan replacement
These are installation figures. The fan runs continuously, so it draws power every hour of the year and it wears out. This calculator can price the replacement itself — switch the scope to a fan replacement — but the electricity is not in any total here.
Correcting a venting problem the commissioning check finds
The backdraft check on an atmospherically vented furnace or water heater is part of commissioning and it is in the technician hours. Fixing a venting fault that the check reveals is not: that is separate work on a different appliance, and it is also why the answer to a stubborn reading is never simply a bigger fan.
Radon in well water
Waterborne radon is a different problem with a different fix — aeration or granular activated carbon at the point of entry — and none of it is priced here. It matters mainly on private wells, and an air system will not touch it.
Structural repair of the slab
Sealing a crack against soil gas is not repairing it. A crack that is still moving, or a slab that has settled, needs fixing on its own terms first, and sealant applied over live movement will simply tear again.
What your insurance policy covers
We do not model it and we will not guess at it. What a homeowners policy covers is set by that policy: your own documents and your insurer are the only sources that can answer it for your house.

Questions people actually ask

In what month is radon highest?

Winter, across most of the country, and it is not the ground that changes — it is the house. Doors and windows stay shut, and warm air rising through the building pulls its replacement in through the floor, which is the same soil gas a mitigation system exists to intercept. A July test can read low in a house that reads high in January. That is why a summer result inside a sale is worth reading twice, and why the post-mitigation test in this estimate is a priced line rather than a favour.

Is high radon a deal breaker?

It is a priced repair rather than a structural discovery. The EPA recommends fixing a home at 4 pCi/L or above and considering it between 2 and 4 pCi/L, and the fix is a pipe, a fan and a day or two of work: this calculator puts a basement system with the riser up an outside wall at about $2,626 in Atlanta, and at $727 where a system already exists and only the fan has died. What derails a sale is usually the timing — a result landing inside a short inspection period — rather than the size of the number.

Is it hard to sell a house with a radon mitigation system?

A system is documented evidence that the house was measured and dealt with, which is a different position from a house nobody has tested. The visible part is the pipe. Running it up an outside wall costs about $2,626 in our Atlanta model; taking it through a closet and out of the roof costs $4,041. That $1,415 difference is almost no extra pipe at all — it is a carpenter, a drywall finisher, a painter and a roofer. Keep the commissioning readings and the post-mitigation result with the house.

Is it worth getting a radon mitigation system?

That turns on your reading, and the EPA publishes the reference points: fix at 4 pCi/L or above, consider fixing between 2 and 4 pCi/L. On cost, this is one of the cheaper permanent things done to a house — about $2,626 for a basement in our Atlanta model. A crawlspace is the expensive case at $5,368, and it falls to $1,843 where the crawlspace has already been encapsulated, because the liner is then already bought. The electricity the fan draws every hour of the year is in no figure here.

Taken from Google’s “people also ask” results for this search on 22 August 2026, not invented.

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