Estimate your foundation repair cost
Method drives price — and the engineer picks the method
"Foundation repair" covers everything from sealing one crack to underpinning a whole house, so a single average is nearly useless. The repair methods form a cost ladder: crack injection, then slab lifting, then wall reinforcement, then piers. Catching problems early keeps you on a lower rung. Because the method sets the price, get a structural engineer's report — $300–$1,000 — before you accept a contractor's scope. An engineer has no stake in selling you piers.
Foundation repair cost by method
| Method | Price | Used for |
|---|---|---|
| Crack injection | $400–$1,500 per crack | Non-structural and minor structural cracks |
| Mudjacking | $3–$8 per sq ft | Lifting sunken slabs; cheaper but heavy |
| Polyurethane foam | $5–$25 per sq ft | Lifting slabs; lighter and waterproof |
| Carbon fiber straps | $300–$600 each | Bowing walls, early stage |
| Wall anchors | $800–$2,500 each | Bowing basement walls; most homes need 3–5 |
| Piers (steel or helical) | $1,000–$3,500 each | Active settlement; most homes need 6–10 |
Piers are where totals jump. Because each support point is priced individually, the number of piers is often the difference between a five-figure and a much larger job — so ask for the engineer's pier count in writing before you sign.
Is it structural or just a crack?
A simple test contractors use: tape clear plastic over the crack, mark its ends with a permanent marker, and check monthly. If it grows, you have active movement and a patch won't fix it. Warning signs of real movement include diagonal cracks from door or window corners, doors and windows that start sticking, and gaps opening between walls and ceilings or floors.
Additional costs to expect
| Item | Typical cost |
|---|---|
| Structural engineer inspection | $300–$1,000 |
| Spot excavation | $2,000–$5,000 |
| Permit (where required) | $100–$400 |
Full-perimeter excavation, full underpinning and house lifting are major engineered projects that no calculator can price honestly; they commonly run well into five figures and need a site-specific engineering plan.
Does insurance cover foundation repair?
Usually not. Standard homeowners insurance treats settling, soil shrink-swell and drainage-related cracking as maintenance rather than a covered loss, and home warranties don't cover structural elements. Coverage generally applies only when a covered event, such as a burst pipe, directly causes the damage — check your policy.
Why this page has no state adjustment
Our other calculators adjust labor by state using government wage data. We don't do that here, on purpose: foundation pricing tracks soil conditions and how competitive local contractor markets are more than it tracks wages. Expansive clay regions see more repairs, but a deep contractor market can keep unit prices near the national average. A wage adjustment would look precise without being accurate.
Questions to ask before you hire
- Has a structural engineer, not just the contractor, specified the repair method and pier count?
- Is the warranty lifetime and transferable to the next owner?
- What is excluded — excavation, landscaping restoration, interior drywall repair?
- Is a permit required here, and is it in the price?
- What happens to the price if you find more damage once work starts?
Methodology and sources
We price each repair method per unit and sum only the methods you select. Every unit price has two or more independent sources, and our ranges are widened to cover where they disagree. Read how we estimate costs.
- Cost to Renovate: foundation repair cost — unit prices, excavation
- UseCalcPro: foundation repair calculator — piers, crack injection
- HomeRepairBase: foundation repair cost — per-pier pricing and counts
- Bedrock Foundation Builders — wall anchors, carbon fiber, the crack test
- FoundationCosts — mudjacking vs polyurethane
- This Old House: structural engineer inspection — engineer fees, permits
- Empire Home Protect — engineer report cross-check, warranty coverage
These prices have not yet been reviewed by a structural engineer or licensed foundation contractor.
Changelog
- : Initial dataset. Foundation repair is priced per unit of an engineered method (per crack, pier, anchor, strap, or sq ft of slab), so the model is a bill of quantities rather than a size or hours model. Every unit price has two or three independent sources (Cost to Renovate, UseCalcPro, HomeRepairBase, Bedrock, FoundationCosts), and ranges are widened to cover their disagreement. No state wage index: sources attribute regional variation to soil (expansive clay) and contractor-market depth, not wages -- a Texas source notes near-average unit prices despite high demand. Applying a wage index here would be false precision. Full-perimeter excavation and full underpinning/house lifting are out of scope for a calculator and are described in text instead. Status stays draft pending a structural engineer's or licensed foundation contractor's review.
- : Editorial review and publication. Every price field re-checked for a source; the calculator's typical default job tested against independently published benchmark ranges (tests/benchmarks.test.ts), which now run on every build. Published at the owner's decision with an explicit note that the page has not yet been reviewed by a licensed tradesperson; the page must not claim such a review until one has actually happened.