Verified ranking · Updated June 2026
Best Basement Waterproofing in Salem, 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.
In the Salem local pack and the deepest-reviewed company in it (4.9 across 250 Google reviews, June 2026), based in East Kingston about 20 miles away. It installs a self-branded system, publishes a transferable guarantee, and handles radon in-house, the broadest and most documented offering. Google lists Reliable first on its perfect rating; we rank on the composite, where 603 depth, system, and warranty lead.
Leads the Salem Google pack on rating with a perfect 5.0 across 166 Google reviews (100 percent five-star) and a spotless BBB record, based next door in Plaistow. It publishes no named system or warranty terms, which is the one place 603 leads it.
Third in the Salem pack with a perfect rating on a smaller base (5.0 across 32 Google reviews), a Haverhill, MA full-service basement company (waterproofing, moisture control, finishing) with more than 20 years of work across New England. A strong but newer and shallower record than the two above.
Also serving the area
A Basement Systems dealer in Hudson with a complete waterproofing system, the deepest review base in the wider area (4.8 across 676), and a clean BBB record.
The national option, with a patented product line and a nationally backed warranty (4.9 across 567), but warranty service runs through the national company and its corporate BBB profile shows 741 complaints in three years.
Side-by-side
| Company | Type | Google (June 2026) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| 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 |
| Reliable Basement Waterproofing | local independent | 5 / 165 | None | No warranty terms published on its website (may be presented at quote). | A+, BBB accredited 2025, 0 complaints (3yr) |
| Northeast Basement Solutions | local independent | 5 / 32 | None | Not stated on its website; 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) |
| Groundworks | national consolidator | 4.9 / 567 | Patented national product line (IntelliJack, AquaStop) | Lifetime, transferable, nationally backed (verbatim terms not verified). | A+ (corporate); 741 complaints closed in 3 years, 514 Service/Repair (~69%), per BBB national profile, accessed June 2026 |
Head-to-head comparisons
- Groundworks vs 603 Basement Solutions
- 603 Basement Solutions vs Erickson Foundation Solutions
- Local Independent vs National Consolidator
- 603 Basement Solutions vs Crack-X
- Reliable Basement Waterproofing vs 603 Basement Solutions
- Groundworks vs Erickson Foundation Solutions
- 603 Basement Solutions vs NH Dry Basement
- Crack-X vs Groundworks
- TC Hafford Basement Systems vs 603 Basement Solutions
Other services in Salem, NH
Data verified as of the dates shown; star ratings change over time. See our methodology.