Solo and small-crew radon mitigators: per-system quotes that price the fan, the sealing, the retest trip, and the callback when the retest still reads high. Free, no signup. All defaults are editable starting points, not market rates.
The retest is a second trip days later, not a line you give away. Price the kit or lab fee here and the drive below.
A retest that still reads over 4.0 pCi/L usually means a bigger fan or a second suction point, on your dime if you guaranteed the result. The callback reserve spreads that cost across every quote instead of eating it on one job.
Radon quotes are usually one flat number said on the phone, and the flat number quietly assumes the first fan in the first hole gets the house under 4.0 pCi/L. Sometimes it does not. The retest comes back high, the house needs a bigger fan or a second suction point, and the return work comes out of a job that was already priced thin. This calculator prices the whole obligation instead: the install, the sealing, the retest trip, and a callback reserve for the share of jobs that need fixing.
Enter your target hourly rate, margin, and minimum job fee, then pick the preset closest to the house. Adjust the fan and materials costs, install and sealing hours, and the retest cost. Tick the second suction point box on large footprints, additions, or poor aggregate, and set your real callback rate: the percent of jobs where you go back for a fan swap or an added point. The tool returns a true system cost, a recommended quote, your effective hourly rate, and what your usual flat price actually pays.
Example only, not typical pricing. A standard basement system at a $75 target rate and 20 percent margin: a $180 fan, $220 of pipe, fittings, and sealant, 5 install hours, 1.5 sealing hours, a $60 retest, and 2 trips at 40 drive minutes and 24 miles each. A 15 percent callback rate on a 3-hour, $120-materials fix adds a $61.66 reserve. True cost is $1,141.32, the recommended quote is $1,375, and it pays $104.83 an hour after materials, vehicle, retest, and reserve. A $1,200 flat quote pays $82.49 an hour, above true cost but $175 under the recommended number, and carries no room for the callback.
Because result guarantees are common in radon work and retests do fail. If roughly one job in seven needs a return fix, spreading that expected cost across all seven quotes keeps the unlucky job from wiping out the profit on the others.
Usually weak pressure field extension: tight soil, poor aggregate under the slab, a large or split footprint, or unsealed openings short-circuiting the suction. The fixes are a larger fan, a second suction point, or more sealing, and all three cost hours and materials.
Yes. Sealing cracks, joints, and the sump is real labor, and skipping it to win the bid means the fan works harder and the retest risk goes up. Price the sealing hours and the job gets easier to pass.
At least two for most operators: the install day and the retest placement or pickup days later. Real estate deals add paperwork and deadline pressure on top. Count the trips and price the drive on each one.
It depends on your state. Some states license or certify mitigators and set their own standards, others follow national NRPP or NRSB certification. Check your state radon program before quoting work. This tool is pricing arithmetic only, not licensing or legal advice.