Foundation Crack Repair Cost Calculator

For injection repairs, foundation crack repair typically runs $250 to $800 per crack, with most jobs totaling $500 to $3,000. A simple surface seal of a minor crack can be $100 to $300, polyurethane or epoxy injection is $400 to $800 per crack, carbon-fiber reinforcement is $600 to $1,200+ per strap, and major exterior excavation and waterproofing can be $2,000 to $6,000+. The drivers are the number of cracks, the repair method, the crack severity (a hairline is cheap, a horizontal/structural crack costs far more), the foundation type (poured concrete is easiest to inject; block and brick cost more), and wall access. Enter your cracks, method, severity, foundation, and access in the calculator above for a localized number.

The direction, width, and behavior tell you how serious a crack is. Usually minor: thin hairline cracks (often just concrete shrinkage) and vertical cracks (from normal settling) — typically cosmetic, though worth sealing if they leak. Worth a professional look: horizontal cracks, which are the biggest red flag because they signal lateral soil or water pressure pushing on the wall and can lead to bowing or failure; stair-step cracks in block or brick (possible settlement); cracks wider than about 1/4 inch; cracks that are actively growing; and cracks where one side is offset from the other. Any crack paired with sticking doors, uneven floors, or bowing walls points to foundation movement. When in doubt on a horizontal, wide, growing, or displaced crack, get it evaluated — the calculator includes a structural-engineer-report add-on.

They solve different problems. Epoxy is a rigid, high-strength resin that structurally bonds a crack — essentially welding the concrete back together and restoring the wall's strength — so it's the choice for structural cracks. But because it's rigid, it's best on dormant (non-moving), dry cracks; it won't bond well to a wet, actively leaking crack, and if the wall keeps moving a rigid repair can crack again. Polyurethane is a flexible foam that expands to fill and seal a crack against water; it accommodates slight seasonal movement and can even be injected into wet, leaking cracks. So: epoxy to restore structural strength on a dormant crack, polyurethane to stop water on a leaking or moving crack. For a typical non-structural crack that's just letting water in, polyurethane is common. The calculator prices both.

For a leak coming through one specific crack, yes — properly injecting it (especially with polyurethane, which fills the full depth of the wall and seals against water) usually stops that leak reliably. A surface patch can reduce a minor leak, but full-depth injection is far more dependable. The caveat is that if water is really coming from a broader problem — high hydrostatic pressure from a high water table, poor grading and drainage, or multiple entry points — sealing one crack won't fix it; water will simply find the next path. In those cases you also need to manage the water with better grading and gutters, a French drain, a sump pump, or exterior waterproofing. Solve both the crack and its cause; the calculator includes drainage and waterproofing add-ons.

Most cracks come down to concrete behavior and soil forces. New foundations commonly develop thin shrinkage cracks as the concrete cures — usually cosmetic. Settlement cracks appear as the house and soil settle, especially with uneven or poorly compacted fill. The more serious ones come from pressure: expansive clay soils that swell when wet, hydrostatic water pressure from a high water table, and frost heave all push laterally on the wall, which is what produces horizontal and bowing cracks. Poor drainage that lets water pool against the foundation accelerates all of it. Because the cause dictates the fix, a good repair addresses why the crack formed — not just the crack itself — which is why drainage and structural evaluation are often part of a lasting solution.

Minor, non-structural cracks — yes; structural ones — no. A handy homeowner can seal a hairline or cosmetic crack with hydraulic cement or a patching compound, and DIY epoxy/polyurethane injection kits let you fill small, non-structural leaking cracks if you clean the crack, place the ports correctly, and follow the instructions. But horizontal, wide, stair-step, growing, or displaced cracks signal potential structural problems and need professional evaluation and repair (proper injection, carbon fiber, or more), and serious water intrusion usually needs professional drainage or waterproofing. Critically, if the crack stems from an underlying issue like settling or soil pressure, the cause must be addressed, not just the surface. When you're unsure whether a crack is minor or structural, get it evaluated — the foundation is too important to guess.

Those are the heavier structural and waterproofing solutions, above simple injection. Carbon-fiber straps are bonded across a wall to reinforce and stabilize it when it's bowing or has structural cracks from lateral pressure — they hold the wall and stop further inward movement without excavation. Exterior excavation and waterproofing means digging down the outside of the foundation to seal the wall, apply a waterproof membrane, and often add exterior drainage — the most involved and expensive option, used for serious, persistent water intrusion or when the wall must be sealed and protected from the outside. Both are professional structural jobs, typically recommended after a structural evaluation. The calculator includes carbon-fiber reinforcement and exterior-excavation methods so you can compare against injection.

Yes. Poured concrete is the easiest to repair and inject — it's a solid, monolithic wall, so injection ports seal well and the resin travels cleanly, making it the baseline. Concrete block (CMU) has hollow cores and mortar joints, so injection is trickier and often needs a different approach, adding about 20%. Brick or stone foundations are the most involved because of their irregular, jointed construction and often older age, adding about 30%. The foundation type also influences which method fits — for example, stair-step cracking in block usually reflects settlement and may call for structural reinforcement rather than a simple seal. Select your foundation type in the calculator so the estimate reflects how your wall is built.

It can, because access is part of the job. If the cracked wall is open and unfinished, the crew works directly on it — the baseline. A finished basement wall means the drywall, insulation, or paneling covering the crack has to be removed to reach it and then patched back afterward, adding about $150 per crack here. A crack hidden behind utilities, ductwork, shelving, or other obstructions is harder still to access and work around, adding about $250 per crack. It's worth checking whether you can expose the crack yourself before the crew arrives to save on access labor. Select your wall access in the calculator so the estimate reflects the real conditions.

Usually fast. A typical crack injection — cleaning and prepping the crack, setting ports, and injecting epoxy or polyurethane — takes about 1 to 3 hours per crack, and most single-crack repairs are done within a few hours to a day. A surface patch is quicker still. Carbon-fiber reinforcement takes a few hours plus curing time for the epoxy. Exterior excavation and waterproofing is the big one — digging down the outside, sealing, and backfilling can take 1 to 3+ days. Multiple cracks, a block or brick wall, finished-wall access, and adding drainage or a sump pump all extend the timeline. The injection itself is quick; curing and any waterproofing work are what add time. Your contractor can give a firm schedule based on the method and scope.