| Type | Cost | Details |
|---|---|---|
| DIY test kit | $10–$30 | 2-7 day test |
| Professional test | $150–$300 | Continuous monitor, certified |
| Sub-slab depressurization | $800–$1,500 | Most common mitigation |
| Crawl space membrane + fan | $1,500–$3,000 | Crawl space homes |
| Heat recovery ventilator | $1,500–$3,000 | Whole-house ventilation |
| Sump pit modification | $500–$1,000 | If sump already exists |
Radon is an invisible, odorless radioactive gas that seeps through foundation cracks and is the leading cause of lung cancer in non-smokers. Testing is cheap ($10-$30 DIY, $150-$300 professional) and mitigation is straightforward ($800-$1,500 for sub-slab depressurization). Every home should be tested regardless of location — radon levels vary house-to-house, not just by geography.
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