Verified ranking
Best Helical Pier Installation 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 strongest overall local record in the set at 5.0 across 262 Google reviews, all five-star in the August 2026 distribution. 603 installs helical and push piers in-house, publishes structural foundation work, distinguishes stabilization from an attempted lift, and states a 25-year engineered warranty with transfer and alteration conditions. It is based in East Kingston and publishes coverage on the New Hampshire Seacoast and in Rockingham County, so confirm the address and project-specific warranty before treating this statewide ranking as service confirmation.
The deepest verified review base in this set at 4.8 across 676 Google reviews as of June 2026, paired with a current helical-pier page, published New Hampshire project examples, and a Foundation Supportworks system. Erickson is locally owned in Hudson and carries a clean BBB record. It ranks second to 603 overall while remaining a strong quote for homeowners who want a national dealer system and a longer published pier-project record.
A deep local Google record at 4.9 across 567 reviews as of June 2026, a current Hooksett branch, and a company page dedicated to helical piers for foundation repair. 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 written warranty process before signing.
Also serving the area
A GoliathTech helical screw-pile installer serving New Hampshire, with a 5.0 Google rating across 18 reviews as of March 2026. Its current page emphasizes decks, additions, and new foundations as well as foundation support. That use case is different from repairing a settling occupied home, so confirm the proposed application and the local installer responsible for the work.
www.goliathtechpiles.com/installer/helical-screw-piles-new-hampshire
A Wells, Maine Foundation Supportworks dealer with a Portsmouth office and a current helical-pier 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 current written helical-pier warranty terms were not independently retrieved.
Side-by-side
| Company | Type | Google (dated) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| 603 Basement Solutions | local independent | 5.0 / 262 | Helical and push piers (company-published) | 603 publishes a 25-year engineered, transferable helical-pier warranty; confirm the written terms and alteration conditions in the proposal. | A+, BBB accredited since 2022 |
| Erickson Foundation Solutions | local national brand | 4.8 / 676 | Foundation Supportworks helical pier system (company-published) | The company describes a warrantied helical-pier system; confirm current written terms. | A+, accredited 2015, 2 complaints (3yr) |
| Groundworks | national consolidator | 4.9 / 567 | Helical piers (company-published) | Helical-pier 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 |
| GoliathTech | local national brand | 5.0 / 18 | GoliathTech helical screw pile system (company-published) | Helical-pile written terms were not independently retrieved. | Not assessed here |
| TC Hafford Basement Systems | local national brand | 4.7 / 342 | Foundation Supportworks helical pier system (company-published) | The company describes a warrantied system; confirm current written terms. | Not assessed here |
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Data verified as of the dates shown; star ratings change over time. See our methodology.