Home / Worked example
Last reviewed October 16, 2026Radon Calculator Worked Example
One run of the radon mitigation cost calculator, line by line: the inputs, each published range, and the total.
Worked example: an 1,800 sq ft home on a basement slab, a sub-slab system with one suction point, the pipe up an exterior wall, a permit required and a professional retest. The low ends add to the low total and the high ends to the high total. EPA's 2010 guide gave $800 to $2,500 for sub-slab suction, in 2010 dollars, so the result sits where both sources overlap.
| Line | Range | Source |
|---|---|---|
| Sub-slab depressurization | $1,200 – $2,000 | HomeGuide, Feb 2026 |
| Under 2,500 sq ft ×1.0, one foundation ×1.0, exterior route ×1.0, no extra points | $1,200 – $2,000 | est. multipliers, all 1 |
| Permit | $25 – $150 | HomeGuide |
| Professional post-mitigation test | $125 – $400 | HomeGuide |
| Estimated total | $1,350 – $2,550 | sum, rounded to $10 |
| Running cost (not in the total) | $50 – $200 a year | EPA, 2010 dollars |
Your own numbers will differ. Run the calculator with your inputs, and see the methodology for where each range comes from.