How much does foundation repair cost?

The most common range is $5,000-$15,000. Small repairs: crack injection ($250-$800 per crack), carbon fiber straps ($3,000-$6,000 per wall). Medium repairs: wall anchors ($3,000-$8,000 per wall), mudjacking ($500-$1,500 per slab). Major repairs: steel push piers ($10,000-$30,000 per house), helical piers ($12,000-$35,000 per house). The cost depends on: the type and severity of the problem, the foundation type (slab, crawl space, basement), the number of piers or anchors needed, accessibility, and your region. Always get a structural engineer's assessment ($300-$800) before hiring a repair contractor. The engineer works for you and has no financial incentive to recommend unnecessary work.

Are foundation cracks serious?

It depends on the type. Vertical cracks (running straight up and down): very common in poured concrete foundations. Usually caused by concrete shrinkage during curing. Typically not structural. Seal with epoxy or polyurethane if they leak. Horizontal cracks (running sideways): more serious. Caused by lateral soil pressure pushing the wall inward. This is a structural issue that will worsen over time. Requires professional repair (wall anchors, carbon fiber, or braces). Stair-step cracks (in block or brick walls): follow the mortar joints in a staircase pattern. Indicate differential settlement (one part of the foundation is sinking more than another). Width matters: cracks wider than 1/4 inch warrant a structural engineer's evaluation. Growing cracks: mark any crack with tape and a date. If it grows over weeks or months, get a professional evaluation.

Does homeowner's insurance cover foundation repair?

Usually not. Standard homeowner's insurance does NOT cover foundation damage from: settling or shifting soil, poor drainage, tree roots, poor construction, or normal wear and tear. Insurance MAY cover foundation damage from: plumbing leaks beneath the slab (if you have plumbing coverage on your policy), vehicle impact, and in some cases, sudden and accidental events. Check your specific policy. Some carriers offer foundation coverage as an add-on (endorsement). If a covered event (like a plumbing leak) caused the foundation damage, file the claim promptly and document everything.

How long does foundation repair take?

Crack injection: 1-2 hours per crack (same-day). Carbon fiber straps: 1-2 days per wall. Wall anchors: 1-2 days per wall. Push piers or helical piers: 2-5 days for a typical house (6-12 piers). Mudjacking: 1-2 hours per slab (same-day). Foam jacking: 1-2 hours per slab (same-day). Most foundation repairs are completed in 1-3 days. The work is typically done from the exterior (piers, anchors) or interior (straps, crack injection). Disruption to daily life is minimal. The repair is effective immediately, though some settling of the repair components may occur over the first few weeks.

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Framing & Structure

Foundation Repair Guide: Types, Signs & Cost

Lumberama Editorial Team, Foundation & Structural Repair Specialists Aug 4, 2026 14 min read

Types of Foundations

Slab-on-grade (concrete slab): A single pour of concrete directly on the ground. Most common in warm climates (southern US). Simple and affordable. Vulnerable to soil movement, poor drainage, and plumbing leaks beneath the slab.

Crawl space: Short foundation walls (2-4 feet) with a space between the ground and the floor framing. Common in moderate climates and areas with high water tables. Provides access to plumbing and HVAC but vulnerable to moisture, pests, and structural issues with piers and beams.

Full basement: Full-height foundation walls (7-8+ feet) creating a usable below-grade space. Most common in cold climates (northern US). Most expensive to build but provides additional living or storage space. Vulnerable to water intrusion, hydrostatic pressure, and wall bowing.

Warning Signs of Foundation Problems

Interior signs: Cracks in drywall (especially at corners of doors and windows), doors and windows that stick or will not close properly, uneven or sloping floors (use a marble or level to test), gaps between the wall and ceiling or wall and floor, and cracks in tile flooring.

Exterior signs: Cracks in the foundation (vertical cracks are common and often not serious; horizontal cracks are more concerning and indicate lateral pressure; stair-step cracks in brick or block walls follow the mortar joints and indicate differential settlement), gaps between the foundation and siding or brick veneer, bowing or leaning foundation walls, and the chimney pulling away from the house.

When to worry: Horizontal cracks in foundation walls (indicates soil pressure pushing the wall inward — this is structural and requires immediate attention), cracks wider than 1/4 inch, cracks that are growing (mark them with tape and a date to track movement), multiple signs appearing simultaneously, and doors and windows that progressively get worse over time.

Repair Methods

Crack injection (epoxy or polyurethane): For non-structural cracks in poured concrete walls. Epoxy injection bonds the crack and restores structural integrity. Polyurethane injection is flexible and better for actively leaking cracks. Cost: $250-$800 per crack.

Carbon fiber straps: For bowed or cracked foundation walls (early to moderate bowing, up to 2 inches). Carbon fiber strips are epoxied to the wall to prevent further movement. Less invasive than wall anchors or braces. Cost: $400-$800 per strap (typically 4-8 straps per wall).

Wall anchors: For bowed or leaning walls. Steel plates are installed on the interior wall, connected by rods to anchor plates buried in the yard (beyond the pressure zone). The system can be tightened over time to gradually straighten the wall. Cost: $500-$1,000 per anchor (typically 4-8 per wall).

Steel push piers (underpinning): For settling foundations. Steel piers are driven through the foundation footing down to stable soil or bedrock. Hydraulic jacks lift the foundation back to (or near) its original position. Permanent solution. Cost: $1,000-$3,000 per pier (typically 6-12 piers per house).

Helical piers: Similar to push piers but screwed into the ground (like a large screw). Used when push piers cannot reach stable soil or for lighter structures. Cost: $1,500-$3,500 per pier.

Mudjacking (slabjacking): For sunken concrete slabs (driveways, patios, garage floors, basement floors). A cement slurry is pumped beneath the slab through small holes to lift it back to level. Cost: $500-$1,500 per slab.

Polyurethane foam injection (foam jacking): Similar to mudjacking but uses expanding polyurethane foam. Lighter weight, faster cure time, and smaller injection holes. Cost: $1,000-$3,000 per slab.