Verified ranking · Updated June 2026
Best Radon Mitigation in Manchester, NH
How we rank (the Bedrock Standard). Every figure below is dated and sourced; star ratings change over time. We read five-star share together with review depth, so a near-perfect share on a large review base counts for more than a perfect score on a small one.
The deepest-reviewed radon specialist in the region (4.9 across 304 Google reviews, June 2026), based in Hooksett with more than 25 years in radon air and water mitigation and NRPP certification. The clear leader of the Manchester radon local pack.
Also serving the area
A full-service foundation firm and National Radon Defense contractor (4.8 across 676) that also handles radon mitigation. A strong option if you want radon folded into broader basement or foundation work.
Handles radon mitigation in-house alongside waterproofing and foundation work (4.9 across 250). A local full-service option, though dedicated radon specialists lead the radon local pack.
Side-by-side
| Company | Type | Google (June 2026) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| Advanced Radon Mitigation & Water Treatment | local independent | 4.9 / 304 | None | Not independently verified; ask at quote. | Not assessed here |
| Erickson Foundation Solutions | local national brand | 4.8 / 676 | Installs the national Basement Systems line (TripleSafe, SaniDry, WaterGuard) rather than a self-branded system | Transferable written warranty (duration not stated). | A+, accredited 2015, 2 complaints (3yr) |
| 603 Basement Solutions | local independent | 4.9 / 250 | Forever Dry System | Publishes a transferable "Dry for Life" guarantee (marketing wording; exact written terms pending). | A+, BBB accredited since 2022 |
Head-to-head comparisons
Other services in Manchester, NH
- Best Basement Waterproofing in Manchester, NH
- Best Foundation Repair in Manchester, NH
- Best Crawl Space Encapsulation in Manchester, NH
Data verified as of the dates shown; star ratings change over time. See our methodology.