Cost · Method

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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Cost by Sub-Method

Sub-method	Cost	Best for
Crack injection	$250 to $800 per crack	Cosmetic hairline cracks
Slabjacking	$500 to $1,300 per area	Settled exterior slabs, driveways
Polyurethane foam lift	$500 to $1,300+ per area	Lightweight lifts, interior, voids
Pier-based underpinning	$1,000 to $3,000 per pier	True slab settlement, 6 to 12 piers typical
Comprehensive multi-method	$5,000 to $20,000	Major settlement with multiple symptoms

How to Compare Slab Foundation Repair Quotes in Chattanooga

Chattanooga slab repair quotes can range from a few hundred dollars (single crack injection) to $20,000+ (comprehensive piering plus lift plus crack sealing). The wide range reflects different sub-methods, so the comparison framework matters more than the dollar number.

Match the sub-method to the diagnosis

Before comparing prices, confirm each quote identifies the SAME underlying issue. A quote for crack injection plus a quote for full piering aren’t comparable; they address different problems. If diagnoses differ, ask each contractor to explain why they reached their conclusion. The elevation survey is the source of truth: settled corners or whole-wall sections show up clearly on a laser-level reading.

Confirm what’s included

Pier-based slab repair quotes typically include the pier system, brackets, excavation, the lift if needed, and the engineering letter. Common exclusions: drywall crack patching, flooring restoration, exterior brick repointing if stair-step cracks need it, and drainage correction. Two quotes at apparently different prices may be quoting different scopes. Get each line item in writing.

Verify warranty + transferability

Pier-based slab repair warranties typically run 25 years on materials plus workmanship, transferable. Crack-injection-only repairs carry shorter 1-to-5-year warranties because the underlying movement may still be active. Make sure the warranty matches the method being installed. A 25-year warranty on a crack injection is unusual and worth questioning.

Questions

Slab Foundation Repair Cost FAQs

How much does slab foundation repair cost?

Slab foundation repair costs $350 to $20,000 per project per Bob Vila's May 2024 cost guide. Cosmetic crack injection sits at the low end (a few hundred dollars per crack). Comprehensive multi-method repair on a major settlement event with piering, slab lifting, and multiple crack repairs sits at the high end. Median residential slab repair runs $3,500 to $7,500 for moderate settlement on a typical home.

What is included in the slab foundation repair price?

Slab repair pricing depends on which sub-method is used. Crack injection includes injection equipment, polyurethane or epoxy resin, and surface patching. Pier-based slab repair includes the pier system, brackets, excavation, and lifting. Slabjacking includes drilling, slurry materials, and patching. Comprehensive packages bundle multiple sub-methods. Common exclusions across all slab repair: flooring restoration, interior cosmetic patching, drainage correction, and exterior brick repointing.

Why does slab foundation repair cost vary so much?

The huge $350 to $20,000 range reflects four very different sub-methods doing very different work. A $350 crack injection job seals a single hairline. A $20,000 comprehensive job underpins a fully-settled slab with piers, lifts the slab, and seals secondary cracks. Within any single sub-method, cost variance is smaller. Diagnosis identifies which sub-method or combination is actually required, which makes the eventual price predictable.

Are there cheaper alternatives to slab foundation repair?

Slab repair has internal cheaper alternatives within the category itself. If the slab needs lifting but full piering is not required, slabjacking or polyurethane foam injection are far cheaper. If only cosmetic cracks are present, injection alone handles them. The category has no external alternative because the slab itself must be addressed; pier-and-beam repair is not an alternative because it applies to a different foundation type.

How do I get an accurate slab foundation repair quote?

An accurate slab repair quote requires on-site elevation survey across the entire slab to identify settlement vs heave, plus a crack inventory documenting width, direction, and progression of every visible crack. Have ready: photos of any interior or exterior cracks, history of any plumbing leaks, age of home, and whether the slab has been previously repaired. Quote turnaround is 24 hours after on-site inspection.

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