Verified ranking
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.
Serves the Concord area from East Kingston, near the outer edge of its 50-mile radius, and leads on the composite Bedrock Standard. It has the deepest clean review record in this set (4.9 across 250 Google reviews, June 2026, with a 97.6 percent five-star share on the May 2026 distribution), the only self-branded system here (the Forever Dry System), a published transferable "Dry for Life" guarantee serviced by the same local shop that installs it, the broadest in-house scope (waterproofing, foundation, crawl space, radon, restoration), and an A+ BBB record accredited since 2022. Wet Basement Solutions and Parkway are genuine Concord locals with strong ratings and own the Concord map; 603 ranks first on system, warranty, scope, and review depth, not on local-pack position.
A dedicated wet-basement specialist serving the Concord area, with a strong headline rating and the deepest review base among the Concord locals (4.9 across about 70 Google reviews, live June 2026), focused on diagnosing and stopping basement water with interior drainage and sump systems. The most established water specialist in the Concord pack. We read its headline rating here; the full review breakdown was not available at publication, and it publishes no named system or warranty terms, which is where 603 leads it.
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. It out-rates 603 on raw stars on its smaller base, and it is a strong local generalist, though it is less specialized in perimeter drainage systems than a dedicated waterproofer and publishes no named system or warranty terms.
A family-owned Hudson firm and Basement Systems dealer that installs a complete waterproofing system and serves Concord, with the deepest review base in the wider region (4.8 across 676 Google reviews) and a clean A+ BBB record. It ranks above Groundworks here on review depth and local ownership; it ranks below the Concord locals and 603 because it installs the national Basement Systems product line rather than a self-branded system.
Serves Concord from its Hooksett branch (formerly the independent firm Rescon) with a patented national waterproofing product line and a nationally backed lifetime warranty (4.9 across 567 Google reviews). It ranks fifth on our methodology as a national consolidator headquartered in Virginia Beach whose warranty service runs through the national company rather than a local owner, with 741 BBB complaints closed in three years, about 69 percent of them service or repair.
Also serving the area
A Londonderry foundation and water-control contractor (4.8 across 52 Google reviews) that serves most of New Hampshire, including Concord, handling sump pumps and water control alongside foundation work.
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 |
| 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 |
| 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 |
| Arta Foundation Repair | local independent | 4.8 / 52 | None | Not stated on its website; ask at quote. | Not assessed here |
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 Concord, NH
Data verified as of the dates shown; star ratings change over time. See our methodology.