Cost Hub
What foundation repair actually costs.
Real numbers from 4,200+ completed jobs since 2008 — not "industry averages." Ranges below are typical for the Tennessee Valley; clay-soil depth and access drive most of the variance.
Cost by method
The full breakdown.
| Method | Typical low | Typical high | Unit | Best for |
|---|---|---|---|---|
| Steel push piers | $1,800 | $2,800 | / pier | Settling slab foundations on clay soil |
| Helical piers | $1,400 | $2,400 | / pier | Lighter loads, additions, decks |
| Slab foundation repair | $3,400 | $11,800 | per job | 1,200–1,800 sq ft single-story slabs |
| Pier & beam repair | $2,800 | $9,200 | per job | Pre-1970 homes on Lookout & Signal |
| Bowing wall — carbon fiber | $350 | $800 | / strap | Bowing < 2 in. on block basements |
| Bowing wall — wall anchors | $600 | $1,100 | / anchor | Bowing > 2 in., long-term reinforcement |
| Basement waterproofing | $3,900 | $14,500 | per job | Interior drainage + sump for clay-soil sites |
| Crawl space encapsulation | $3,200 | $13,000 | per job | Most pre-2000 homes in Hamilton County |
| Mudjacking | $3 | $9 | / sq ft | Concrete slab/sidewalk leveling |
| Polyurethane foam leveling | $6 | $25 | / sq ft | Faster cure, lighter weight than mudjacking |
Ranges reflect typical 2024–2026 jobs in Hamilton County. Final quote depends on soil depth, access, and scope.
Detailed cost guides
Method-by-method cost breakdowns
Deeper guides on what drives cost for the most-requested foundation repair methods. Each page includes the per-unit price, total project range, factors that move cost within the range, and what's bundled into a typical quote.
Basement Waterproofing Cost
Basement waterproofing costs $2,300 to $7,600 per project per Bob Vila's May 2024 cost guide. Interior perimeter drainage with sump pump runs $3,000 to $6,000. Exterior excavation and membrane application runs $5,000 to $7,600 and up. Crack injection alone is under $1,000. Multi-component systems with both interior drainage and exterior waterproofing typically exceed $7,600. Cost is driven by water-entry path, approach (interior vs exterior), and basement perimeter length.
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Crawl Space Repair Cost
Crawl space repair and encapsulation costs $700 to $25,000 per project per Bob Vila's May 2024 cost guide. The low end is a vapor-barrier-only install on a small, accessible crawlspace. The upper end is a full encapsulation with dehumidifier, perimeter drainage, and bundled pier-and-beam structural repair. Tennessee Valley humidity (annual averages near 70 percent) and historic crawlspace ventilation requirements drive most Chattanooga-area projects to the encapsulation end of the range, not vapor-barrier-only.
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Helical Piers Cost
Helical piers cost $1,000 to $3,000 per pier installed per Bob Vila's May 2024 cost guide. Most Tennessee Valley residential projects require 6 to 12 piers, putting total project cost roughly $6,000 to $36,000. Cost drivers include required drive depth, pier count (severity-driven), site access, and whether structural lift is part of the scope. Bundled drainage or interior repair adds to the total separately.
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Mudjacking Cost
Mudjacking costs $500 to $1,300 per area per Bob Vila's May 2024 cost guide. Per-square-foot pricing is $3 to $6 depending on slab thickness, lift height, and access. Most residential projects (driveway, walkway, patio) sit in the middle of the range. Mudjacking is one of the cheapest slab-lifting methods because the work is standardized, single-day, and uses inexpensive cement-based slurry rather than specialized chemicals.
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Pier and Beam Repair Cost
Pier and beam repair costs $700 to $25,000 per project per Bob Vila's May 2024 cost guide. The range is wide because the work scales from a single beam sister-ing ($700 to $1,800) to a full structural rebuild with multiple new piers, beam replacement, and joist work ($15,000 to $25,000). The cost driver homeowners most underestimate is access — a Chattanooga crawl-space at 18 inches of clear height adds roughly 30 percent vs. the same work in a 36-inch crawl.
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Polyurethane Foam Leveling Cost
Polyurethane foam concrete leveling costs $500 to $1,300 per area on small lifts per Bob Vila's May 2024 cost guide, with larger projects scaling above by total cubic feet of foam used. Foam material costs more per cubic foot than the cement slurry used in mudjacking, but the high expansion ratio (about 25x liquid volume) means most projects use far less material. Foam is the right choice when soft soils, interior lifts, or weight-sensitive applications make mudjacking unsuitable.
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Slab Foundation Repair Cost
Slab foundation repair runs $350 to $20,000 per project per Bob Vila's May 2024 cost guide. The wide range covers very different sub-methods. Crack injection on cosmetic cracks: $250 to $800 per crack. Slabjacking on settled exterior slabs: $500 to $1,300 per area. Pier-based slab underpinning: $1,000 to $3,000 per pier with 6 to 12 piers typical. Comprehensive multi-method: $5,000 to $20,000.
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Steel Push Pier Cost
Steel push piers cost $1,000 to $3,000 per pier per Bob Vila's May 2024 cost guide. Heavier residential structures with brick veneer or two-story construction need 8 to 12 piers typically, putting total project cost $8,000 to $36,000. Refusal depth is the biggest cost-variance driver because it cannot be predicted precisely until excavation begins. Tennessee Valley sites typically reach refusal at 15 to 25 feet.
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