Foundation Crack Repair Cost (2026)
Repairing a foundation crack costs $250 to $1,200, and most homeowners pay about $600 to have one crack injected with epoxy or polyurethane. That covers the common vertical crack in a poured wall. A horizontal crack or a bowing block wall is a different problem — it means the wall is moving, and the repair is reinforcement at $2,500 to $15,000.
- How much does it cost to fix a foundation crack?
- Fixing a foundation crack costs $250 to $1,200 per crack, with most injections around $600. Polyurethane injection for a leaking crack is $350 to $1,100; epoxy for a structural bond is $400 to $1,200. A horizontal crack in a bowing wall needs reinforcement instead, at $2,500 to $15,000 for the wall.
- Which foundation cracks are serious?
- Horizontal cracks in a basement wall, stair-step cracks in block or brick, cracks wider than 1/4 inch, cracks that are wider at one end than the other, and any crack that is growing. Thin vertical cracks in poured concrete are usually shrinkage from curing and are a moisture concern, not a structural one.
- Epoxy or polyurethane for foundation cracks?
- Polyurethane foam stays flexible and expands into the crack, so it is the choice for stopping water through a crack that may move slightly. Epoxy cures rigid and bonds the concrete back together, so it is the choice where structural strength matters. Both cost about the same per crack.
- Can I repair a foundation crack myself?
- A hairline, non-leaking vertical crack in a poured wall, yes — injection kits are $30 to $150 and work well on dry cracks. Leaking cracks, cracks wider than 1/8 inch and anything horizontal or stair-stepped need a professional diagnosis, because sealing a crack that is still moving hides the movement without stopping it.
| What you're pricing | Low | Typical | High |
|---|---|---|---|
| DIY injection kitHairline and non-leaking cracks only | $30 | $80 | $150 |
| Hairline or shrinkage crack sealingCosmetic; seals against moisture | $250 | $450 | $800 |
| Polyurethane injectionLeaking crack; flexible, stops water | $350 | $600 | $1,100 |
| Epoxy injection, poured wallStructural bond; restores strength | $400 | $700 | $1,200 |
| Carbon fiber stitching across the crackStops a crack widening further | $600 | $1,200 | $2,500 |
| Exterior excavation and sealWhere interior injection cannot reach the leak | $1,500 | $3,000 | $6,000 |
| Basement or garage slab crackRouted and filled; per crack | $200 | $600 | $1,500 |
| Horizontal crack / bowing wallNeeds reinforcement, not sealing — whole wall | $2,500 | $7,000 | $15,000 |
What drives the price
- Direction of the crack
- Vertical cracks in poured walls are usually shrinkage. Horizontal and stair-step cracks indicate soil pressure or settlement, and change the job from sealing to structural repair.
- Whether it leaks
- A dry crack can be sealed cosmetically. An actively leaking crack needs polyurethane injection or exterior work, and possibly drainage to relieve the pressure behind it.
- Wall material
- Poured concrete takes injection well. Concrete block has hollow cores, so cracks show up along mortar joints and injection is less effective.
- Access
- Finished basement walls have to be opened up to reach the crack, which adds drywall work that is not on the crack repair quote.
Measure before you call
Mark the ends of the crack with a pencil and the date, and measure its width with a coin or a crack gauge. Check again in a month and again after a season. A crack that has not moved is almost always a $250 to $800 sealing job. A crack that has grown is a structural question.
That record is also the first thing a structural engineer will ask for, and it is worth more in a dispute with a seller or an insurer than any photograph taken on the day you noticed it.
Common questions
- How much does it cost to fix a foundation crack?
- Fixing a foundation crack costs $250 to $1,200 per crack, with most injections around $600. Polyurethane injection for a leaking crack is $350 to $1,100; epoxy for a structural bond is $400 to $1,200. A horizontal crack in a bowing wall needs reinforcement instead, at $2,500 to $15,000 for the wall.
- Which foundation cracks are serious?
- Horizontal cracks in a basement wall, stair-step cracks in block or brick, cracks wider than 1/4 inch, cracks that are wider at one end than the other, and any crack that is growing. Thin vertical cracks in poured concrete are usually shrinkage from curing and are a moisture concern, not a structural one.
- Epoxy or polyurethane for foundation cracks?
- Polyurethane foam stays flexible and expands into the crack, so it is the choice for stopping water through a crack that may move slightly. Epoxy cures rigid and bonds the concrete back together, so it is the choice where structural strength matters. Both cost about the same per crack.
- Can I repair a foundation crack myself?
- A hairline, non-leaking vertical crack in a poured wall, yes — injection kits are $30 to $150 and work well on dry cracks. Leaking cracks, cracks wider than 1/8 inch and anything horizontal or stair-stepped need a professional diagnosis, because sealing a crack that is still moving hides the movement without stopping it.
How we price this. Figures are national 2026 estimates built from contractor quote ranges, material pricing and regional labour rates, then cross-checked against published industry cost data. Reckon Home does not sell, broker or perform this work. Use these numbers to judge whether a quote is reasonable — not as a quote.