Choosing the right foundation repair company can be the difference between a stable home and a problem that quietly gets worse over time. According to the U.S. Department of Housing and Urban Development, nearly 25% of American homes have some structural movement. Since foundation problems often start slowly, early signs can look like normal wear and tear. Repairing your foundation early can help prevent issues from getting worse, saving you money and a headache.
This guide covers the top foundation repair companies to consider, average costs, coverage area, pros and cons, and more.
Our Top Picks
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- Certified structural engineers involved in projects
- High-quality materials and installation methods
- Strong warranties on structural stabilization
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- Award-winning ethical business practices
- Long-term, transferable product warranties
- Transparent, no-pressure sales process
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- Industry-leading moisture control products
- Massive North American contractor network
- Decades of proven product innovation
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- Largest nationwide footprint and availability
- Nationally backed, transferable warranty coverage
- Comprehensive, all-in-one repair services
How We Rate Foundation Repair Companies
We rated each foundation repair company in this guide on a one-to-five scale using seven criteria: licensing and credentials (22%), workmanship and technical skill (20%), customer experience (18%), warranty and support after service (15%), pricing and transparency (10%), responsiveness and availability (8%), and reputation (7%). Learn more about how we rate foundation repair companies in our rating methodology.
- Ram Jack: Nationwide Service
- Thrasher: Serves the Midwest
- Basement Systems: Nationwide Service
- Groundworks : Nationwide Service
- TerraFirma: Serves the Pacific Northwest
- Olshan: Serves the South & Central U.S.
- Acculevel: Serves the Midwest & Beyond
Ram Jack
- Average Project Cost: $3,500 to $11,000
- Service Area: Nationwide (25+ States)
Our Take
Ram Jack is the top national choice for homeowners needing structural pier repair. It combines patented steel pier technology with licensed engineering oversight on every qualifying project — a standard that few national competitors match. Its Warranty Trust program stands out because warranty funds are kept in a separate national trust, so your coverage stays valid even if your local dealer closes.
However, Ram Jack works through a dealer network, so service quality and warranty terms can vary by location. Be sure to read your local contract carefully and ask your dealer for a written engineering assessment before any work begins.
Cost Information
- Steel pier installation: $4,000 to $8,000 per project
- Concrete lifting: $2,000 to $5,000 per project
- Drainage correction: $1,000 to $3,500 per project
Best Service to Consider
Ram Jack’s Patented Steel Piling System for pier-based foundation stabilization, particularly in expansive clay or cold-weather freeze-thaw regions where soil movement is a persistent driver of settlement.
Thrasher Foundation Repair
- Average Project Cost: $3,000 to $12,000
- Service Area: Midwest (CO, IA, IL, KS, MO, NE)
Our Take
Thrasher is the most accountable foundation repair company in the Midwest. It won the 2024 International BBB Torch Award for Ethics — the top recognition in its category — and supports that reputation with a 25-year transferable warranty on foundation products and a price assurance guarantee.
Founded in 1975, the company has nearly 50 years of experience in Nebraska, Iowa, Missouri, Kansas, Illinois, and Colorado. Its TripleSafe Sump Pump System is a strong solution for flood-prone Midwest basements. The main limitation is geography. If you are outside those six states, you will need to look elsewhere.
Cost Information
- Foundation pier installation: $4,000 to $9,000 per project
- Basement waterproofing system: $3,500 to $8,000 per project
- Crawl space encapsulation: $3,000 to $7,000 per project
Best Service to Consider
Thrasher’s TripleSafe™ Sump Pump System for basement waterproofing in flood-prone Midwest climates where backup power protection matters.
Basement Systems
- Average Project Cost: $2,500 to $10,000
- Service Area: Nationwide (50 states; over 350 dealers across U.S. and Canada)
Our Take
Basement Systems has been the benchmark for crawl space and basement waterproofing since 1987, with more than 350 certified contractors across the U.S. and Canada. Its CleanSpace encapsulation and WaterGuard drainage systems are genuine industry standards — widely licensed, widely installed, and consistently well-reviewed for durability.
The critical caveat: Basement Systems is a product and certification network, not a direct service provider. Every job is completed by a local authorized contractor, and warranty terms vary from one dealer to the next. Before signing anything, confirm your local contractor’s specific warranty in writing and check their independent reviews on Google or the BBB.
Cost Breakdown
- Crawl space encapsulation: $3,000 to $8,000 per project
- Sump pump installation: $1,500 to $3,000 per project
- Interior drainage system: $4,000 to $9,000 per project
Best Service to Consider
The WaterGuard interior perimeter drainage system paired with a TripleSafe™ sump pump for comprehensive wet basement management.
Groundworks
- Average Project Cost: $4,000 to $15,000
- Service Area: Nationwide (33 states)
Our Take
Groundworks is the largest privately owned foundation and waterproofing company in the U.S., with more than 61 locations across 33 states and over 1.5 million customers. This scale makes it a reliable option for homeowners in major metro areas who want one contractor for both structural and waterproofing repairs, all under a nationally backed transferable warranty. Prices are usually higher than regional competitors, and scheduling can take longer during busy seasons.
Groundworks also operates under several regional brand names, such as AFS Foundation & Waterproofing Specialists and Foundation Recovery Systems. If you get a quote from a regional brand, make sure the warranty is backed by Groundworks directly before signing.
Cost Breakdown
- Foundation stabilization: $3,500 to $7,500 per project
- Basement waterproofing: $3,000 to $7,000 per project
- Crawl space encapsulation: $2,500 to $6,500 per project
Best Service to Consider
Groundworks’ Complete Home Stabilization Program, which bundles structural repair with moisture management under one contract and one transferable warranty.
TerraFirma Foundation Systems
- Average Project Cost: $3,000 to $10,000
- Service Area: Pacific Northwest (OR & WA only)
Our Take
TerraFirma is the top foundation repair choice in Oregon and Western Washington, with specialized expertise in the clay-heavy, rain-saturated soils that make the Pacific Northwest one of the more challenging regions for foundation stability. Operating as an authorized Supportworks and Basement Systems contractor since 2005, TerraFirma offers a 75-year transferable settlement warranty on qualifying pier installations — one of the longest warranty terms in the industry.
The company was also recognized as a 2025 Top Workplace in Oregon and Southwest Washington, which reflects a level of operational stability that matters for long-term warranty continuity. If you’re outside Oregon or Western Washington, TerraFirma isn’t an option.
Cost Breakdown
- Pier installation: $4,000 to $9,000 per project
- Crawl space encapsulation: $3,000 to $8,000 per project
- Concrete leveling: $1,500 to $4,000 per project
Best Service to Consider
TerraFirma’s helical pier system for homes on clay-heavy or saturated Pacific Northwest soils, where standard push piers often underperform.
Olshan Foundation Solutions
- Average Cost: $3,000 to $12,000
- Service Area: South & Central U.S. (AL, AR, CO, FL, GA, IN, KS, KY, LA, MN, MS, MO, NE, NC, OH, OK, TN, TX)
Our Take
With more than 90 years in business, Olshan has the longest track record in slab foundation repair across the South and Central U.S., where clay-heavy, moisture-sensitive soils often cause settlement problems. Its patented Cable Lock™ ST Plus system was designed for these conditions and is a true technical advantage.
The lower overall score is due to a pattern of BBB complaints from homeowners who had valid transferable warranties but were told their coverage was void after Olshan closed offices in their state. Olshan is still a strong choice in active markets, especially in Texas, but you must confirm active coverage at your address before signing.
Cost Breakdown
- Pier installation (standard): $7,854 to $11,086 for a 2,000-square-foot home
- Drainage and minor maintenance services: $500 to $3,050 per project
- Waterproofing: $2,000 to $5,000 per project
Best Service to Consider
The Cable Lock™ ST Plus System for slab foundation settlement in expansive clay soil regions, where its hybrid steel-and-concrete design provides deeper bearing than standard pressed piles.
Acculevel
- Average Project Cost: $2,000 to $7,500
- Service Area: Midwest (IL, IN, IA, KY, MI, MO, OH, WI) + PA & VA
Our Take
Acculevel has served Indiana and nearby Midwest states since 1996 with a clear value proposition: honest assessments, no-pressure sales, and life-of-structure warranties that transfer to future owners at no extra cost, with no hidden fees or conditional exclusions. The A+ BBB accreditation supports this reputation.
The lower overall score comes from mixed results on larger, multi-phase repairs, where a smaller company can face capacity and coordination challenges that bigger companies handle more smoothly. For straightforward, single-phase projects like bowed wall repair, crawl space encapsulation, or targeted pier installation, Acculevel offers strong value. For major structural overhauls, it is wise to get at least one more bid.
Note: While headquartered in the Midwest, Acculevel has recently expanded its family-owned service model into Pennsylvania and Virginia.
Cost Breakdown
- Foundation pier installation: $3,500 to $7,500 per project
- Crawl space encapsulation: $2,500 to $6,000 per project
- Basement waterproofing: $2,000 to $5,000 per project
Best Service to Consider
Acculevel’s carbon fiber strap system for bowed or cracked basement walls — a cost-effective, minimally invasive solution for a common Midwest problem.
