Structural repair estimator · Updated June 2026
Foundation Repair Cost Calculator
Foundation repair costs $5,100 on average, with most homeowners paying $2,200 to $8,100. A simple crack injection can run as little as $300, while full underpinning with piers can exceed $30,000. Use our free calculator to get an instant estimate by repair method, quantity and foundation type.
Enter your foundation repair details
Estimated foundation repair cost
Typical range for your configuration
Cost breakdown
What affects foundation repair cost?
- Repair method — The single biggest cost driver. A crack injection costs a fraction of a full pier installation.
- Quantity — More cracks, straps, piers, or affected square footage directly increases cost.
- Foundation type — Basements and finished spaces are harder to access than open crawl spaces.
- Damage severity — Minor cosmetic cracks cost far less than active, ongoing structural settlement.
- Soil conditions — Expansive clay soils (common in Texas and Oklahoma) often require deeper, more numerous piers.
- State & metro — High-cost-of-living metros like San Francisco, New York and Boston run 20–40% above national averages.
How much does foundation repair cost in 2026?
Foundation repair costs $5,100 on average, with most homeowners paying between $2,200 and $8,100. Minor fixes like crack sealing can run as little as $300, while major structural work involving piers or full underpinning can exceed $15,000 to $30,000 or more. Foundation repair covers five very different procedures at wildly different price points — the trick is matching the right method to your actual damage, not just picking the cheapest option. Use our free calculator above for an instant estimate by method, quantity and foundation type.
Foundation repair cost calculator — by method
| Method | Cost per unit | Typical total |
|---|---|---|
| Crack injection | $250–$1,500 per crack | $300–$2,500 |
| Carbon fiber straps | $400–$1,100 per strap | $4,000–$15,000 |
| Mudjacking (slab) | $3–$6 per sq ft | $500–$3,000 |
| Polyurethane foam lift | $5–$25 per sq ft | $1,500–$5,000 |
| Steel / helical piers | $1,000–$3,500 per pier | $5,000–$30,000 |
| Full underpinning | $1,500–$4,500 per pier | $16,000–$80,000 |
Which foundation repair method do I need?
The method your foundation needs depends entirely on what's actually happening structurally — not on which one is cheapest. A structural engineer's assessment is the only reliable way to know for sure, but these general patterns hold:
- Hairline, non-moving crack in a poured wall — Crack injection seals it against water but doesn't address structural movement.
- Bowing basement wall — Carbon fiber straps or steel wall anchors arrest further inward movement.
- Sunken concrete slab, driveway, or garage floor — Mudjacking or polyurethane foam lifts it back to grade.
- House settling unevenly, sticking doors, sloping floors — Steel or helical piers lift and stabilize the structure.
- Severe differential settlement across the whole foundation — Full underpinning with 8–16+ piers is typically required.
Warning signs you need foundation repair
- Diagonal cracks from window or door corners — A classic sign of differential settling.
- Doors and windows sticking — Frame shifting means the structure is moving.
- Gaps between walls and ceiling or floor — Even a quarter-inch gap can indicate movement.
- Sloping or uneven floors — A marble that rolls on its own suggests settling.
- Bowing basement walls — Horizontal cracking with inward bowing is a structural emergency.
Does homeowners insurance cover foundation repair?
Generally, no. Most homeowners insurance policies exclude foundation damage caused by soil movement, settling, or gradual deterioration — these are treated as maintenance issues. Coverage typically applies only to sudden, accidental damage from a named peril, like a burst pipe flooding a slab. Earthquake damage is excluded unless you carry a separate earthquake endorsement, and flood-related foundation damage requires separate flood insurance. Some policies cover resulting cosmetic damage (like cracked drywall) if the underlying cause was a covered event, but the foundation repair itself is rarely covered.
Frequently asked questions
How do I estimate foundation repair cost?
Identify the repair method your damage requires (crack injection, carbon fiber, mudjacking, piers, or underpinning), estimate the quantity needed (cracks, straps, square footage, or pier count), and factor in your foundation type. A structural engineer's assessment gives the most accurate quantity — our calculator provides a ballpark once you have that number.
How accurate is this foundation repair cost calculator?
Our estimates are typically within 20–30% of contractor quotes, since exact pier count and soil conditions can't be confirmed without an in-person structural assessment. Prices also vary dramatically between contractors — sometimes by 50% or more — so always get at least 3 quotes.
What is the average cost of foundation repair?
The national average is around $5,100, with most homeowners paying between $2,200 and $8,100. Minor crack repairs can cost as little as $300, while major structural work like piering or underpinning can exceed $15,000 to $30,000.
How many piers does my foundation need?
Most homes need 3 to 12 piers for moderate settlement, while severe differential settlement across a whole foundation can require 8 to 16 or more. A structural engineer's report specifies exact pier locations and count — never accept a pier count from a contractor without independent verification.
Can I do foundation crack repair myself?
Small, hairline vertical cracks under 1/8 inch wide can often be sealed with a DIY epoxy kit. Anything larger, actively leaking, or showing signs of ongoing movement should be assessed by a structural engineer — foundation work affects your home's structural integrity and resale value, and a botched DIY repair can cost far more to fix later.
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Disclaimer: All foundation repair cost estimates are for informational purposes only based on average 2026 US contractor rates. Actual costs vary based on soil conditions, foundation type, damage severity, accessibility and contractor availability. A structural engineer's in-person assessment is strongly recommended before committing to any repair method. Always obtain multiple quotes from licensed foundation repair contractors before proceeding with any project.