Verified ranking
Best Foundation Repair 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 edge of its 50-mile radius, and leads on the common foundation-and-water case: foundation crack repair, bowing-wall stabilization, foundation wall replacement, sill and beam replacement, plus the waterproofing and crawl space work that often comes with it, all in-house. It carries the deepest clean review record here (4.9 across 250 Google reviews, June 2026, 97.6 percent five-star on the May 2026 distribution), a published transferable "Dry for Life" guarantee serviced locally, the broadest in-house scope, and an A+ BBB record. On documented structural-pier depth specifically, Erickson and Groundworks below carry the longer engineered track records, and we credit that directly. 603 ranks first on the composite standard and the common repair case.
A Foundation Supportworks dealer (helical piers and wall straightening, via the Basement Systems / Supportworks line) that serves Concord, with the deepest verified review base in the region (4.8 across 676 Google reviews, June 2026), family-owned local accountability, and a clean A+ BBB record. It is the strong second here and the pick for heavy engineered-pier work. It installs the national Basement Systems and Supportworks lines rather than a self-branded system, and its Yelp record is thinner (3.3 across 19).
Brings a patented national structural product line (IntelliJack piers, wall stabilization) and serves Concord from its Hooksett branch (4.9 across 567 Google reviews). It carries deep documented pier experience as a national consolidator, and ranks third on our methodology because its warranty service runs through the national company in Virginia Beach rather than a local owner, with 741 BBB complaints closed in three years.
A Concord-based masonry and construction company with a perfect verified record (5.0 across 41 Google reviews) that handles foundation repair and concrete work. It out-rates the firms above on raw stars on a smaller base, and it is the local generalist option for masonry and concrete foundation repair rather than engineered structural piering.
Also serving the area
A Londonderry foundation repair and concrete contractor (4.8 across 52 Google reviews) serving most of New Hampshire, including Concord, for crack repair, concrete leveling, and water control.
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 |
| 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 |
| Parkway Masonry & Construction | local independent | 5 / 41 | None | Not stated on its website; ask at quote. | Not assessed here |
| Arta Foundation Repair | local independent | 4.8 / 52 | None | Not stated on its website; ask at quote. | Not assessed here |
Head-to-head comparisons
- Local Independent vs National Consolidator
- 603 Basement Solutions vs Crack-X
- Groundworks vs Erickson Foundation Solutions
- Crack-X vs Groundworks
- Crack-X vs Arta Foundation Repair
- 603 Basement Solutions vs Jackson & Company Foundation Repair
Other services in Concord, NH
Data verified as of the dates shown; star ratings change over time. See our methodology.