Foundation Crack Repair Cost (2026): Prices by Crack Type

What you're really paying for

Almost every concrete foundation cracks, because concrete shrinks as it cures and soil settles and freezes around it. So the price depends on two questions. Is the crack letting water in? And is it still moving? A dry, stable hairline crack might cost nothing. A leaking vertical crack is a few hundred dollars. A wall pushing inward is a structural repair in the thousands.

For warning signs and a DIY injection walkthrough, see the foundation crack repair guide. This page covers what each repair costs.

Epoxy vs polyurethane injection: cost per crack

Most basement crack repairs in poured walls are done by low-pressure injection from inside. The crew glues ports along the crack, seals the face, then pumps resin in from the bottom up through the full wall thickness. Expect 2 to 4 hours per crack.

Polyurethane foams and stays flexible. It works in a damp or actively leaking crack and moves a little with the wall, so it's the standard choice when the goal is to stop water. Typical cost is $250 to $800 per crack, up to about $1,000 for a long crack that runs floor to ceiling in a tall wall.

Epoxy cures hard and bonds the two sides of the crack back together. It needs a dry crack and a stable wall, and it's used when an engineer wants strength restored, not just a watertight seal. It runs about $300 to $800 per crack.

Neither one fixes a wall that is still moving. Injecting a horizontal crack without bracing the wall just means the wall cracks again next to your repair.

DIY crack injection kits

A polyurethane kit costs $60 to $150 and handles roughly 10 feet of crack. If you're handy and the crack is a simple vertical one in a poured wall, it's a reasonable weekend job. Surface caulk and hydraulic cement often fail because water pushes in behind them. Kits don't work on block walls, since the hollow cores swallow the resin.

Foundation crack leak and water leak in a basement wall

A foundation crack leak shows up as a damp stripe, white crust or a trickle after rain. Injection from inside stops most of them. First check outside: downspouts dumping next to the wall and soil sloping toward the house send water straight into the crack. Fixing grading and downspouts can cost less than the crack repair and protects the whole wall.

When inside access isn't possible, contractors dig down outside, seal the crack and add a membrane, for $1,000 to $3,000 per crack. If water is coming in along several walls or where the floor meets the wall, you have a groundwater problem, not a crack problem. Compare floor-wall seepage fixes and basement waterproofing cost before sealing cracks one at a time. The basement leak finder can help narrow down the cause.

Structural repairs: straps, anchors and piers

Carbon fiber straps are epoxied to the inside of a bowing wall, usually every 4 to 6 feet. They work for walls that have moved less than about 2 inches. Each strap runs roughly $500 to $1,000 installed, and most walls land at $4,000 to $8,000.

Wall anchors run a steel rod through the wall to a plate buried in the yard. Expect $500 to $1,000 per anchor and $5,000 to $10,000 per wall. You need open yard space on that side.

Steel I-beam braces bolt to the floor and the floor framing. They cost $5,000 to $12,000 per wall and work when the yard side is blocked.

Piers fix foundation settling. Steel push or helical piers are driven to stable soil to support or lift the house. Each pier costs $1,000 to $3,000, and a settling corner typically needs 4 to 6. That's why foundation settling repair cost usually starts around $4,000 and can pass $15,000 for a whole wall. See the full foundation repair cost guide for pier jobs.

Basement floor heaving repair cost

A floor that rises in the middle, with cracks that are higher on one side, is usually expansive clay swelling under the slab, or sometimes frost or a plumbing leak. Cutting out and repouring a heaved section runs about $1,000 to $5,000. Severe heaving can pass $10,000, because the soil under the slab has to be dealt with. A floor that has sunk instead can often be lifted with mudjacking ($3 to $6 per square foot) or polyurethane foam ($5 to $10 per square foot). Rule out a slab leak first if the heave appeared suddenly.

When to worry: width thresholds

Measure the widest point with a crack gauge. Common rules of thumb:

• Under 1/16 inch: normal shrinkage. Seal only if it leaks.
• 1/16 to 1/8 inch: usually not structural. Inject if it leaks, and mark the ends to watch for growth.
• 1/8 to 1/4 inch: watch closely. Get an engineer if it's diagonal, stair-step, or wider at one end.
• Over 1/4 inch: get a structural engineer before any repair.
• Any horizontal crack, any offset, or any bow: structural, whatever the width.

Other red flags: sticking doors and windows, sloping floors, gaps at trim, and a crack that grows past your pencil marks. An independent engineer's inspection costs $300 to $800. The engineer isn't selling you the repair, and the report tells contractors exactly how many straps or piers to price.

Worked example: two common jobs

Leaking vertical cracks. A poured basement wall has two vertical cracks, each about 1/16 inch wide and 7 feet long, both damp after heavy rain. A contractor quotes polyurethane injection at $550 per crack. Two cracks at $550 is $1,100. Add two 10-foot downspout extensions for $40. Total: $1,140. No engineer needed, since the cracks are thin and vertical.

Horizontal crack in a block wall. A 30-foot block wall has a horizontal crack and bows in about 1 inch. The engineer charges $500 and calls for carbon fiber straps every 5 feet, which is 6 straps. At $800 per strap that's 6 × $800 = $4,800. The crack is then sealed for $400. Total: $500 + $4,800 + $400 = $5,700.

Warranties and ways to save

Most injection companies warranty the repaired crack against leaks, often for life and sometimes transferable to a buyer. It covers that crack only. Wall bracing and pier systems usually carry long transferable warranties as well. Get it in writing, and keep it with the engineer's report. Buyers ask for both.

• Fix gutters, downspouts and grading first. It's the cheapest way to stop many leaking cracks.
• Have all the cracks done in one visit to pay setup once.
• Hire the engineer yourself, then get 2 to 3 quotes based on the report. Run any quote through the quote checker.
• Don't let a company sell you full waterproofing when one crack is the only leak.

Homeowners insurance usually doesn't pay for cracks from settling, shrinkage or soil pressure. It may cover foundation damage from a sudden covered event, such as a burst pipe.