What crack repair costs
Sealing a single non-structural foundation crack costs $350 – $900 professionally injected, and takes a few hours. That is the bill for the large majority of foundation cracks homeowners find.
The price jumps only when the crack is a symptom rather than the problem. A wall that is bowing or a footing that is settling needs reinforcement — $2,500 – $10,000 and up — and sealing it alone would be treating the messenger. The crack’s direction tells you which situation you are in, and that check is free.
Foundation crack repair cost by method
| Repair method | Typical range | Unit | What drives it |
|---|---|---|---|
| Polyurethane injection (waterproofing) | $350 – $900 | per crack | Crack width, water flow, access |
| Epoxy injection (structural bond) | $400 – $950 | per crack | Wall thickness, port spacing |
| DIY injection kit | $60 – $150 | per kit | Covers roughly 10 ft of crack |
| Hydraulic cement patch (cosmetic) | $20 – $60 | per repair | Surface-only, no waterproofing |
| Carbon fiber strap | $400 – $800 | per strap | Spaced 4–6 ft along the wall |
| Wall anchor / brace | $700 – $1,900 | per anchor | Yard access for the exterior plate |
| Slab crack repair (interior) | $500 – $1,600 | per crack | Flooring removal and replacement |
| Exterior excavation + membrane patch | $1,500 – $4,500 | per crack | Depth, landscaping, hand vs machine dig |
| Structural engineer’s report | $450 – $600 | per visit | Independent of any contractor |
Source: Compiled from published 2025–2026 contractor pricing datasets and injection-material supplier pricing, normalized to installed cost including labor. · Last reviewed July 30, 2026 · Reference data · How we compile these figures
Cost by what your crack looks like
Match your crack to the row below. If two rows could apply, price for the more serious one and get the assessment before you get the quote.
| Crack type | Typical cost | Approach | What’s going on |
|---|---|---|---|
| Hairline vertical (under 1/16 in.) | $0 – 150 | monitor or DIY | Shrinkage. Often needs nothing at all |
| Vertical, 1/16 – 1/4 in. | $350 – 900 | inject | Seal for water and radon control |
| Diagonal from a window/door corner | $350 – 1,200 | inject + monitor | Possible differential settling — watch it |
| Stair-step in block or brick | $800 – 6,000 | assess first | Movement or soil pressure; engineer advised |
| Horizontal in a basement wall | $2,500 – 15,000 | structural | Soil pressure. Carbon fiber or anchors |
| Offset faces (one side protrudes) | $5,000 – 30,000 | structural | Active movement. Engineer before any quote |
Source: Ranges reflect the repair each crack pattern typically requires. Patterns indicating movement carry wide ranges because scope is set by an engineer’s findings, not by the crack’s appearance. · Last reviewed July 30, 2026 · Reference data · How we compile these figures
Not sure which row is yours? Types of foundation cracks walks through all six patterns with the identifying details.
Epoxy or polyurethane — which do you need?
Contractors price both in the same band, so this is a technical choice, not a budget one.
- Polyurethane expands and stays flexible. It is the default when the goal is stopping water, and it tolerates the small seasonal movement every foundation has.
- Epoxy is structural adhesive — it welds the concrete faces back together and restores load transfer. It is specified when an engineer wants the wall to carry load across the crack again. Epoxy is rigid, so it is the wrong choice on a crack that is still moving.
If a contractor cannot explain why they chose one for your crack, that is a useful signal about the rest of the bid.
DIY vs hiring a pro
A $60 – $150 polyurethane injection kit genuinely works on the right crack: clean, accessible, non-structural, in poured concrete, roughly 1/16 – 1/4 inch wide. Plan on an afternoon.
Skip DIY when any of these are true:
- The crack is horizontal, stair-stepped, or wider than 1/4 inch.
- One face is offset from the other.
- Water is actively flowing under pressure — injection material will not set against it.
- The wall is concrete block. The hollow cores swallow injection material; block needs a different approach.
The honest math: a DIY kit saves you roughly $300 – $750 on a job where the risk of getting it wrong is low. On a structural crack it saves nothing, because sealing was never the repair.
When a crack means something structural
Get a structural engineer’s assessment ($450 – $600, independent of any contractor) when you see horizontal cracking, stair-step patterns through block, width over 1/4 inch, offset faces, or cracks alongside doors that have started sticking in multiple rooms.
That report is the cheapest money in this entire category. It converts a sales conversation into a specification three contractors can bid against, and it frequently comes back with a smaller scope than the free inspection proposed. Related reading: full foundation repair cost guide, signs of foundation problems, and the cost calculator for your own numbers.