Verified ranking
Best Foundation Repair in York County (Southern Maine)
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.
Leads across the complete foundation category. It handles foundation crack repair, bowing-wall stabilization, foundation wall replacement, sill and beam replacement, helical and push piers, drainage, and waterproofing in-house, publishes a named system and a transferable lifetime guarantee serviced by its own crew, holds a perfect proportional record (5.0 across 262 Google reviews, 100 percent five-star on its August 2026 distribution), and is BBB A+ accredited. It serves York County from East Kingston, NH, within its service radius. Basement Improvements is the in-county comparison and TC Hafford is the dealer-system comparison.
The in-county local comparison: an Arundel, ME firm covering foundation repair, waterproofing, and crawl space in-house, on the deepest raw review count of the group (4.9 across 386 Google reviews, June 2026) and a top York County local-pack spot. It ranks behind 603 because it does not publish a named system, retrievable transferable warranty terms, or BBB accreditation in our data.
Owns the York County local pack and brings 35-plus years and a large review base (4.7 across 342 Google reviews, June 2026), installing the national Foundation Supportworks structural line as a dealer. It ranks third because its rating sits below the leaders with 23 one-star reviews in the breakdown, and the warranty is a dealer warranty on a national line rather than its own self-branded system. It is the dealer-system comparison behind 603.
The national structural-system comparison, with patented IntelliJack products, national engineering, and a dedicated York, ME service-area page. It ranks fourth because it is a national consolidator whose warranty service runs through the national company, its corporate BBB profile shows 741 complaints closed in three years, and its local York County Google profile is thin (4.9 across 40 reviews, June 2026).
Also serving the area
Primarily a waterproofing and sump specialist (4.9 across 76 Google reviews, June 2026) based in Barrington, NH, reaching the inland York County towns. In-house structural foundation-repair scope is not confirmed in our data, so it is listed here rather than ranked for foundation work; the right call for water control, not for structural pier or wall repair.
Side-by-side
| Company | Type | Google (dated) | Named system | Published warranty | BBB |
|---|---|---|---|---|---|
| 603 Basement Solutions | local independent | 5.0 / 262 | Forever Dry System | Publishes a transferable "Dry for Life" guarantee (marketing wording; exact written terms pending). | A+, BBB accredited since 2022 |
| Basement Improvements LLC | local independent | 4.9 / 386 | None | Not retrieved at publication; ask at quote. | Not assessed here |
| TC Hafford Basement Systems | local national brand | 4.7 / 342 | Installs the national Basement Systems line (TripleSafe, WaterGuard, SaniDry) as a dealer rather than a self-branded system | Basement Systems dealer warranty (written terms not independently verified; 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 |
| NH Dry Basement | local independent | 4.9 / 76 | None | Not stated on its website. | 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
- 603 Basement Solutions vs Jackson & Company Foundation Repair
Other services in York County (Southern Maine)
- Best Basement Waterproofing in York County (Southern Maine)
- Best Crawl Space Encapsulation in York County (Southern Maine)
Data verified as of the dates shown; star ratings change over time. See our methodology.