Foundation Crack Repair Cost (2026): Injection to Anchors
Quick answer: Typical foundation crack repair cost for sealing one non-structural crack with epoxy or polyurethane injection is $250 to $800, though some waterproofing cost guides put professional epoxy injection at $800 to $1,500 per crack. Structural repairs cost much more: wall anchors run about $400 to $1,000 each, stabilizing a bowing 20-foot wall usually costs $1,600 to $11,000 depending on method, and piers run $1,000 to $3,000 each. A DIY injection kit costs $100 to $400 but only suits small, stable cracks.
Cost sources checked October 28, 2026: This Old House (updated Oct. 8, 2026), Angi waterproofing (updated Oct. 16, 2026), Angi crack repair (updated July 9, 2026), HomeGuide (2026 guide, no update date shown), Fixr (updated Jan. 27, 2026), Forbes Home (verified Dec. 1, 2024). U.S. dollars. Local prices vary.
In this guide
How much does foundation crack repair cost?
The biggest price driver is whether you are sealing a crack or stopping a wall from moving. Sealing is a few hundred dollars. Structural stabilization is thousands. Here is what the cost guides report:
| Type of crack repair | Typical cost | Source |
|---|---|---|
| Hairline or vertical crack, injection (non-structural) | $250–$800+ per crack | HomeGuide; This Old House |
| Crack sealing, general range | $200–$1,000 | Fixr |
| Professional epoxy injection (waterproofing guides) | $800–$1,500 per crack | Angi; This Old House (Mar. 2026) |
| Wide, horizontal or stair-step crack | $1,000–$5,000+ | HomeGuide |
| Cracks with a bowed wall | $5,000–$15,000+; $30,000+ for major problems | HomeGuide |
| DIY epoxy or polyurethane kit | $100–$400 | Angi |
| Hydraulic cement, 10-lb bucket | $15–$20 | Angi |
Why the spread on injection? HomeGuide, This Old House and HomeAdvisor all list $250 to $800 for a typical crack, while Angi’s and This Old House’s waterproofing pages list $800 to $1,500. Long cracks, cracks that were patched before, and hard-to-reach walls behind finished drywall tend to land at the higher end. None of the sources we checked published a per-linear-foot injection price; contractors in these guides quote per crack.
Not sure which kind of crack you have? Start with our guide to cracks in foundation walls.
Epoxy vs. polyurethane crack injection
The cost guides we checked price epoxy and polyurethane injection in the same range rather than separately. The real difference is what each one does.
| Epoxy | Polyurethane foam | |
|---|---|---|
| Main job | Bonds the crack; the stronger material | Seals out water |
| Wet or leaking cracks | Less suited | Bonds better to wet surfaces |
| Cure speed | Slower | Faster |
| Typical use | Dry, stable cracks | Actively leaking cracks |
Comparison based on Angi, which calls epoxy “generally preferred” for strength and polyurethane a good choice for leaking cracks. Either way, This Old House notes that injection seals a crack but doesn’t stop movement. If the wall is still shifting, the crack can return.
When is it more than sealing? Structural repair costs
Horizontal cracks, bowing walls and settlement call for stabilization, not just a filler. These are the common methods and what they cost:
| Repair | What it does | Typical cost |
|---|---|---|
| Wall anchors | Plates inside tied to anchors in the yard, about every 5 feet | $400–$700 each (Angi, 2025 data); $500–$1,000 each (HomeGuide) |
| Carbon fiber or steel straps | Bonded to the wall to stop further bowing | $350–$1,000 per strap (Angi); $1,700–$5,600 for a 20-ft wall (HomeGuide); $4,000–$12,000 for 12 strips (This Old House, Fixr) |
| Helical tiebacks | Screw anchors driven into soil outside the wall | $1,000–$3,000 each (HomeGuide); $1,500–$1,800 each (Angi) |
| Excavate and straighten | Dig outside, push wall back, then reinforce | $6,700–$11,000 for a 20-ft wall (Angi; HomeGuide similar) |
| Piers / underpinning | Support a settling foundation on deeper soil | $1,000–$3,000 per pier (This Old House; Fixr); $12,000–$52,500 total, 8–12 piers typical (Forbes Home) |
Steel I-beam wall bracing is another common option for bowing walls, but none of the cost guides we checked gave a reliable per-beam price, so get it quoted locally.
For context, This Old House puts overall foundation repair at $2,224 to $8,134, with an average of $5,179. It also notes that a crack caught early may cost $250 to $800, but one left to widen into structural damage can reach $10,000 to $15,000 or more.
If water is coming through the crack, drainage often needs fixing too. If it’s also coming up at the base of the wall, read water seeping through the basement floor. For pricing, see basement waterproofing cost, French drain cost and sump pump replacement cost.
How to fix a foundation crack yourself (and when not to)
DIY injection is reasonable only for a crack that is non-structural, not growing, and less than 1/8 inch wide, according to Angi. Kits cost $100 to $400 and the job takes one to two hours. Forbes Home puts a typical kit at about $200.
The basic steps from Angi’s guide:
- Clean the crack with a wire brush and blow out dust.
- Attach injection ports about 8 to 12 inches apart along the crack.
- Spread the surface paste over the crack and the port bases, then let it set.
- Inject from the lowest port upward, capping each port as material appears at the next one.
- After curing, cut off the port tops.
Know the limits. HomeGuide says hardware-store kits lack the durability, strength and warranty of professional repairs, and This Old House warns that DIY sealers often fail within a season. Hydraulic cement is a quick patch for minor leaks, not a structural repair. Skip DIY for horizontal, stair-step, offset or growing cracks.
Safety first: Wear gloves and eye protection when working with epoxy and follow the kit’s ventilation instructions. Don’t excavate next to a bowing wall or try to force it back into place.
How much does a structural engineer inspection cost?
For anything beyond a simple sealing job, an independent opinion is cheap insurance against buying the wrong repair.
| Inspection type | Typical cost | Source |
|---|---|---|
| Structural engineer foundation inspection and report | $300–$750 | HomeGuide (Dec. 2025) |
| Foundation inspection, average | About $600 (range $300–$1,000) | This Old House (June 2026) |
| Structural engineer report | $500–$1,000 | This Old House (Oct. 2026) |
| Repair company inspection | $400–$750, often credited if you hire them | HomeGuide |
| Permits | $75–$1,000+, depending on scope | HomeGuide |
This Old House notes that free inspections from repair companies can be biased toward the company’s own services. An engineer’s report lets you get competing bids on the same scope of work.
What should a foundation crack repair quote include?
- The diagnosis: what is causing the crack (shrinkage, settlement, soil pressure, water) and how they know.
- Method and material: epoxy or polyurethane, number of cracks, and their lengths; or the number and spacing of anchors, straps or piers.
- Drainage plan: whether gutters, grading or interior drainage are part of the fix.
- Access and restoration: who removes and replaces drywall, carpet, landscaping or concrete.
- Permits and engineering: whether a permit or stamped plan is included.
- Itemized pricing so you can compare bids line by line.
Warranty questions to ask
- Does the warranty cover the crack leaking again, the wall moving again, or both?
- Is it transferable if you sell the house, and is there a fee?
- Does it require annual inspections or maintenance to stay valid?
- What happens to the warranty if the company goes out of business?
Foundation crack repair cost FAQs
How much does it cost to fix a small crack in a foundation?
A small, non-structural crack typically costs $250 to $800 for professional injection, based on HomeGuide and This Old House. A DIY kit costs $100 to $400.
Is foundation crack injection worth it?
For a stable crack that leaks or lets in moisture, yes; it’s one of the cheapest foundation repairs. It won’t fix a wall that is still moving, so get structural cracks evaluated before paying for injection alone.
Is epoxy or polyurethane better for foundation cracks?
Epoxy is stronger and generally preferred for dry, stable cracks. Polyurethane bonds better to wet surfaces and cures faster, so it’s often used on actively leaking cracks. Cost guides price them in the same range.
How much does it cost to fix a horizontal crack in a basement wall?
HomeGuide lists $1,000 to $5,000+ for wide, horizontal or stair-step cracks, rising to $5,000 to $15,000+ when the wall is bowed. The final cost depends on whether anchors, straps or excavation are needed.
Updated October 28, 2026. Written and edited by Jordan Hale. General educational guidance; use a qualified professional for structural, electrical or mold work.
