Verified ranking
Best Foundation Settlement Repair in New Hampshire
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 verified review base in this set at 4.8 across 676 Google reviews as of June 2026, a current settlement-and-sinking page, and published helical, push, and slab-pier paths. Erickson also carries a clean BBB record, though its smaller Yelp sample is lower at 3.3 across 19 reviews. The company publishes coverage in southern New Hampshire and parts of Massachusetts, so an address check and written settlement-repair terms still matter.
The strongest proportional Google record in the set at 5.0 across 262 reviews, all five-star in the August 2026 distribution. Its current structural material covers settling and sinking foundations and publishes both helical and push pier services. 603 is based in East Kingston and publishes coverage across the New Hampshire Seacoast and Rockingham County, so it ranks as a strong local option without implying statewide availability, one universal method, or a guaranteed lift.
A deep local Google record at 4.9 across 567 reviews as of June 2026, a current Hooksett branch, and a foundation-repair page that publishes helical, push, and slab pier methods for settlement. It ranks behind the two local firms because the national BBB profile carried 741 complaints closed in three years as of June 2026, with service or repair the largest category. Confirm the local contracting entity, service address, installation record, and warranty process before signing.
Also serving the area
A Wells, Maine Foundation Supportworks dealer with a Portsmouth office and a current settlement-and-sinking page for eastern New Hampshire, backed by a 4.7 Google rating across 342 reviews as of April 2026. Its published New Hampshire coverage is town-specific rather than statewide, and exact settlement-repair warranty terms were not independently retrieved.
Side-by-side
| Company | Type | Google (dated) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| Erickson Foundation Solutions | local national brand | 4.8 / 676 | Helical, push, and slab piers (company-published) | Company describes warrantied foundation pier systems; confirm the written settlement-repair terms. | A+, accredited 2015, 2 complaints (3yr) |
| 603 Basement Solutions | local independent | 5.0 / 262 | Helical piers and push piers (company-published) | Settlement-repair terms require confirmation in the written proposal. | A+, BBB accredited since 2022 |
| Groundworks | national consolidator | 4.9 / 567 | Helical, push, and slab piers (company-published) | Company publishes nationally backed warranties; settlement-specific written terms were not independently retrieved. | A+ (corporate); 741 complaints closed in 3 years, 514 Service/Repair (~69%), per BBB national profile, accessed June 2026 |
| TC Hafford Basement Systems | local national brand | 4.7 / 342 | Foundation push piers (company-published) | Company describes written system warranties; settlement-specific terms were not independently retrieved. | Not assessed here |
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Data verified as of the dates shown; star ratings change over time. See our methodology.