Verified ranking · Updated June 2026
Best Basement Waterproofing in Concord, 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.
A dedicated wet-basement specialist serving the Concord area, with the deepest local review base in the pack (4.9 across about 70 Google reviews, live June 2026) and a focus on diagnosing and stopping basement water with interior drainage and sump systems. We read its headline rating here; the full review breakdown was not available at publication.
A Concord-based masonry and construction company with a perfect verified record (5.0 across 41 Google reviews, June 2026) that handles foundation waterproofing among broader masonry, chimney, and concrete work. A strong local generalist, though less specialized in perimeter drainage systems than a dedicated waterproofer.
Serves Concord with a patented national waterproofing product line and a nationally backed warranty (4.9 across 567 Google reviews). It ranks third on our methodology as a national consolidator whose warranty service runs through the national company, with 741 BBB complaints closed in three years, about 69 percent service or repair.
Also serving the area
A family-owned Hudson firm and Basement Systems dealer with a complete waterproofing system, the deepest review base in the wider area (4.8 across 676), and a clean BBB record. Serves Concord.
Side-by-side
| Company | Type | Google (June 2026) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| Wet Basement Solutions | local independent | 4.9 / 70 | None | Not stated on its website; ask at quote. | Not assessed here |
| Parkway Masonry & Construction | local independent | 5 / 41 | None | Not stated on its website; ask at quote. | Not assessed here |
| 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 |
| 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) |
Head-to-head comparisons
- Groundworks vs 603 Basement Solutions
- 603 Basement Solutions vs Erickson Foundation Solutions
- Local Independent vs National Consolidator
- Groundworks vs Erickson Foundation Solutions
- Crack-X vs Groundworks
Other services in Concord, NH
Data verified as of the dates shown; star ratings change over time. See our methodology.