Foundation repair cost: crack injection, piers, and drainage
$2,300–$10,000
Most US homeowners report paying between those amounts for common repairs. A couple of injected cracks lands far below it; a full piering project lands above it. Your quotes will vary by method, access, and region.
Foundation repair is the most high-pressure sales environment in home improvement — literally, often door-to-door after a drought. The single most important dollar you spend here is usually a structural engineer's independent report ($500–$1,500), because it tells you what actually needs fixing before five repair companies each sell you their favorite method. Prices below are what the methods cost once you know which method you need.
What drives the cost: method vs access vs extent
Method. Sealed cracks are cheap; lifting and supporting a settled slab or bowing wall is not. The method ladder — injection, piers, excavation/drainage — is also the price ladder.
Extent and access. Piers are priced per pier, and pier count is set by the engineered plan, not the salesperson's optimism. Interior work needs finished-basement access; exterior work needs excavation room and often landscaping restoration.
Water. Foundation movement and drainage problems travel together. Many “foundation” bills include gutters, downspout extensions, grading, or interior drainage — and skipping the water fix invites the movement back.
Extras. Permits, engineer drawings, slab access cuts and patching, and plumbing pressure tests under slab (leaks beneath homes accelerate settlement) all ride along.
Cost by repair method
| Method | Typical range | When it applies |
|---|---|---|
| Epoxy crack injection | ~$250–$450 per crack on multi-crack jobs (with a visit minimum; first crack ~$350–$800) | Structural, dry, narrow cracks |
| Polyurethane foam injection | $500–$800 per crack | Active/leaking cracks; also lifts slabs |
| Pressed-concrete piers | $1,400–$3,600 each | Slab settlement, budget-conscious piering |
| Steel piers | $2,000–$4,900 each | Deep load transfer, heavier settlement |
| Interior/exterior drainage (installed) | $40–$130 per linear ft | Water-driven movement, basement leaks |
| Full piering project | $15,000–$40,000+ | Widespread settlement |
DIY vs hiring a pro
The honest answer: there is no DIY tier for structural work. Epoxy kits ($50–$150) can seal cosmetic hairline cracks in a basement wall; that's a moisture and aesthetics purchase, not a repair decision, and it's fine as one. Everything structural — piers, lifting, wall anchors, drainage — is engineered, permitted, warrantied professional work. A pier placed by guesswork is a $3,000 hole in the ground.
What you CAN do: the cheap prevention stack — extend downspouts 4–6+ feet, grade soil away from the house, water foundation soil consistently in drought (soil movement is mostly moisture swings), and fix leaky exterior fixtures promptly.
Difficulty rating: not applicable beyond sealing cosmetic cracks.
Repair vs monitor: where the threshold sits
- Monitor (tape across the crack, check quarterly): hairline, dry, inactive cracks with no door/window sticking changes. Many foundations have harmless cracks.
- Seal/inject when cracks admit water, or widen past ~1/8 inch while otherwise stable.
- Engineer, then repair when you see stair-step cracking that's widening, horizontal basement wall cracks or bowing, doors/windows that newly won't latch, sloping floors with measurable drop, or gaps at exterior corners. Progression — change over a season — is the trigger, not any single crack width.
The expensive fake decision is “wait and see” on active movement: progression converts a three-pier repair into a nine-pier repair.
Hiring a pro: what a fair quote includes
The sequence matters: independent structural engineer first (not the repair company's in-house “consultant”), then bids written against the engineer's plan. A fair foundation quote references that plan, specifies method and unit counts (piers, anchors, linear feet), permits and engineer sign-off, excavation/patching scope, drainage measures addressed, plumbing pressure test if slab-leak-suspected, and a written transferable warranty.
Red flags: door-knock pricing after neighborhood drought, “your house is 2 years from collapse” fear math, proprietary method sold without engineer involvement, no written plan for the water, and deposits demanded before permits.
Frequently asked questions
How much does foundation repair cost?
Common repairs: roughly $2,300–$10,000. Crack injection is hundreds per crack, piers $1,400–$4,900 each, and full piering projects reach $15,000–$40,000+.
Does insurance cover it?
Settling and soil movement: usually no. Sudden covered events like burst pipes causing damage: sometimes. Ask your insurer about your policy and cause, in writing.
Fix before selling?
Engineered, warrantied, disclosed repairs sell far better than ignored cracks. The strategies are repair or sell-as-is-at-a-discount; “ignore it” is neither.
Are lifetime warranties worth anything?
Transferable, labor-included warranties from long-lived companies are meaningful signals. Read exclusions — drainage changes and plumbing leaks often void them.
Method-by-method ballpark before you talk to anyone: foundation cost estimator.