Columbus radon mitigation pricing by foundation type (2026)
These are the price bands we see for Central Ohio homes in 2026, sorted by the foundation under the house, because the foundation decides more of the cost than anything else. A written proposal after an inspection is what sets your actual number.
Some items belong in every tier because Ohio's mitigation standards (the appendix to OAC 3701-69-08) require them: an inspection and floor plan drawing before the proposal, a communication test where the material under the slab is unknown, sealing of the floor-wall joint and reachable cracks, a fan outside the living space with a discharge above the highest eave, a monitor or marked gauge, labels, an exterior disconnect for an outside fan, and a backdraft check where natural-draft gas appliances share the basement. The same rules require every proposal to show the installed price and an estimate of the yearly operating cost, so bids can be compared line for line.
| Foundation type | Typical price range | What drives the number |
|---|---|---|
| Slab on grade | $1,200 to $1,800 | Usually one suction point and a short run to the attic or an outside wall. Common in newer subdivisions and some postwar ranches. |
| Poured basement | $1,500 to $2,400 | One suction point in most homes, plus sealing of the floor-wall joint and sump. Interior chases to the attic cost more than an outside run. |
| Stone or block basement | $1,800 to $2,800 | Walls with many mortar joints and floors poured in sections need more sealing and sometimes a second suction point. Openings that cannot be sealed must be disclosed in writing. |
| Crawl space | $1,800 to $3,500 | Sealed membrane of at least 6 mil polyethylene, heavier where the crawl holds storage, with 12-inch sealed overlaps fastened to walls and piers, and a fan drawing from beneath. |
| Basement or slab plus crawl | $2,500 to $4,500 | Split-levels and ranch additions that need sub-slab suction and a crawl membrane. Ohio's protocol calls for testing each foundation type before and after. |
| Large basement, two suction points | $2,500 to $4,500 | Where footings, separate slab pours, or tight clay stop one suction point from reaching the whole floor. The communication test shows it before the install. |
| Activating a passive pipe | $700 to $1,200 | A fan added to a builder's existing vent pipe, placed in the attic or outside, with a monitor, labels, and a discharge that meets the Ohio rules. |
| Repair or fan replacement | $200 to $600 | Swapping a worn fan, fixing a gauge or alarm, resealing a sump cover. Altering a system brings it up to the Ohio standard; a plain fan swap does not. |
| Professional short-term test | $150 to $300 | At least 48 hours, placed by an Ohio-licensed tester. Needed for a sale and useful before and after mitigation. |
Four things to check before signing:
Both Ohio license numbers are on the proposal. The company needs a mitigation contractor license and the person supervising the job needs a mitigation specialist license, both from the Ohio Department of Health.
The guarantee line is filled in. Ohio requires either a guarantee to bring the average below 4 pCi/L, with its conditions, or a written explanation of why there is none. A blank here is a missing requirement, not a detail.
The testing conflict is disclosed. If the same company tested the house, the contract has to say so and note the value of long-term testing and a second opinion.
The post-mitigation test is planned. It belongs between 24 hours and 30 days after the fan starts, run by the installing specialist or an independent licensed tester.
For a starting range on your own house, use the calculator, or read what a quote should contain, line by line.
Data sources
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