Foundation repair cost breakdown

Foundation Repair Cost Calculator

Answer first: foundation repair costs $4,500 on average in 2026. Minor crack repair: $500–$1,500. Piering or underpinning: $10,000–$30,000. Waterproofing: $2,000–$10,000.

Estimate cost

Minor crack injection (DIY or contractor)

$500–$1,500 total

Epoxy or polyurethane injection for non-structural cracks under 1/4 in. Only attempt DIY on clearly non-structural hairline cracks in poured concrete walls.

Carbon fiber straps for bowing walls

$4,000–$10,000 total

For inward-bowing basement walls. Per-strap cost: $400–$700. Most homes need 8–15 straps. Does not fix the underlying drainage or soil pressure — combine with waterproofing.

Piering or underpinning (settling foundation)

$1,000–$3,000 per pier; most homes need 10–30 piers

Push piers or helical piers stabilize settling foundations. A 10-pier job runs $10,000–$30,000. Get at least 3 bids and verify the contractor's warranty terms.

Full basement waterproofing system

$2,000–$10,000 depending on perimeter length

Interior drainage channel + sump pump system. Exterior waterproofing (excavation + membrane) costs more but lasts longer. Addresses water intrusion, not structural settling.

Interactive workflow

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View planning notes
Best reviewed quote
Ready-mix supplier A
Red flags
0
Proposal total
$3,824
Pour window
171 min
Local cost defaults and ZIP memory

Saved cost defaults

Reuse bag price, ready-mix price, delivery fee, and waste factor across quote reviews.

Local assumptions
ZIP47474
1 yd3 as bags$259
1 yd3 ready-mix$475
Break-even3.3 yd3
  • 80 lb bag price: $6
  • Ready-mix price per yd3: $165
  • Delivery + short-load: $310
  • Wait-time rate: $95 per hour

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How much does foundation repair cost?

Foundation repair costs $500–$30,000+ depending on the type. Minor crack injection: $500–$1,500. Carbon fiber straps for bowing walls: $4,000–$10,000. Piering or underpinning: $1,000–$3,000 per pier, with most homes needing 10–30 piers. Waterproofing: $2,000–$10,000. The national average is about $4,500.

How do I know if my foundation needs repair?

Signs include cracks wider than 1/4 inch (especially horizontal or stair-step cracks in brick), doors or windows that stick or no longer close, floors that slope or feel bouncy, gaps between walls and ceilings, and water in the basement. Vertical hairline cracks under 1/4 inch are common settling cracks and usually not structural.

What is the cheapest way to fix a foundation crack?

For non-structural hairline cracks under 1/8 inch, epoxy injection DIY kits cost $50–$150. For minor cracks under 1/4 inch wide, a contractor charges $500–$800 with epoxy or polyurethane injection. Only attempt DIY on clearly non-structural cracks in poured concrete walls — block foundation cracks or horizontal cracks always need a structural engineer evaluation first.

Does homeowners insurance cover foundation repair?

Most standard homeowners policies exclude foundation repair caused by settling, soil movement, or gradual deterioration. Insurance typically covers sudden damage from a covered peril (burst pipe causing collapse, earthquake if you have earthquake coverage). Always review your specific policy and get a written estimate from a licensed structural engineer before filing a claim.

How long does foundation repair take?

Crack injection takes 1 day. Carbon fiber straps: 1–2 days. Piering or underpinning: 1–3 days depending on pier count. Full basement waterproofing: 2–5 days. Lifting a sunken slab with polyurethane foam: 1 day. The timeline depends heavily on the number of piers, access, and excavation needed.