Slab Foundation Repair Cost

Slab-on-grade homes have no crawl space or basement, so every repair happens through the slab itself or from the outside along the perimeter. Warning signs include cracks in the slab or the brick veneer, doors that stick, gaps at baseboards and floors that slope toward one corner.

The price depends on what is actually wrong: a shrinkage crack, a void under one section, a plumbing leak washing out the soil, or a corner of the house that is settling. This guide covers prices for each case, a line-item breakdown of a typical pier job and what to ask for in a quote. For other foundation types, see our main foundation repair cost guide.

Average cost

Typical slab repair totals reported by national cost guides and contractors, as of October 2026:

Slab foundation repair cost by method

Installed prices for the most common slab repair methods. The number of piers or the square footage lifted sets the final total.

Cost breakdown: materials, labor, permits and extras

Line-item estimate for stabilizing a settling corner of a slab-on-grade house with four steel push piers, then sealing the related slab cracks and patching interior finishes. Ranges are national, as of October 8, 2026.

Piers are most of the bill; a job that needs only a sunken interior section lifted with slurry or foam can come in under $2,000.

What affects the price

• Repair method (slab jacking, piers, polyurethane foam). Slabjacking with cement slurry is the cheapest lift at about $3–$9 per sq. ft.; polyurethane foam costs $8–$25 per sq. ft.; and piers, which reach stable soil, cost $990–$4,400 each depending on the type. See our mudjacking cost guide for lifting prices.
• Size of the slab and number of problem areas. Foam and slurry are priced by the square foot, and piers by the count. Olshan reports that a small settled corner needs 4–6 piers, most slab jobs need 5–15, and widespread settlement can take 12–20 or more.
• Cracks versus uneven settlement. Cracks with no movement cost $250–$1,500 each to seal or inject. Uneven settlement is a structural problem: HomeGuide puts structural slab repairs at $2,000–$12,000+, and piering projects at $8,000–$30,000+.
• Plumbing leaks under the slab. A leaking water or drain line under the slab can wash out soil and cause settling. Angi reports slab leak repairs average about $2,280 ($630–$4,400), including leak detection that runs about $150–$400.
• Floor coverings that must be removed. Crews often have to cut through tile, hardwood or carpet to reach the slab. Angi reports build-back of a small floor opening at about $300–$500, rising to $10,000+ when finished floors or cabinets are involved.
• Engineer evaluation. A structural engineer's report costs about $300–$1,000 (Olshan lists $499–$780 for a residential report). It tells you whether you need piers or only a cosmetic fix, which can save thousands.

Ways to save

• Get an independent engineer's report before calling repair companies, so every contractor bids on the same pier count and method.
• Ask whether slabjacking will do the job. For a sunken interior or garage slab with no ongoing settlement, it costs a fraction of piers.
• Have a plumber test for under-slab leaks if the settling is recent. Fixing a leak early ($630–$4,400 on average) can keep it from turning into a pier job.
• Correct drainage first: clean gutters, extend downspouts and regrade soil away from the slab. Water near the perimeter is a common cause of settlement.
• Compare at least three written quotes on price per pier, depth guarantees and warranty transferability, which matters when you sell.
• Plan floor replacement with the repair. If you already intend to change the flooring, schedule the slab work first and skip paying for build-back twice.

Related questions people ask

How much does concrete slab foundation repair cost?

Most concrete slab foundation repairs cost $1,000–$10,000. Angi reports a wide overall range of $350–$20,000 for slab repair, from simple crack patches to multi-pier stabilization; full slab replacement with the house lifted can reach $50,000–$100,000.

How to get an accurate quote

Get at least three written quotes from licensed, insured foundation contractors, ideally after an engineer's evaluation. Give each the same information:

• Where you see cracks (slab, brick, drywall), their width and whether they are growing, plus any doors or windows that stick.
• The engineer's report, any plumbing leak test results and the age of the house.
• What covers the floor in the affected area (tile, hardwood, carpet) and what sits outside the perimeter (patios, driveways, landscaping).
• Ask each bidder to list the method, number and type of piers, target depth, floor patching, permits, cleanup and the warranty terms.

FAQ

Are cracks in a slab foundation normal?

Thin shrinkage cracks are common as concrete cures and usually cost $250–$800 to seal. Cracks that widen, have one side higher than the other, or come with sticking doors suggest settlement and should be checked by an engineer.

How long does slab foundation repair take?

Crack sealing and slabjacking usually take a few hours to a day. A pier job typically takes one to three days, plus time for engineering and permits.

Is it worth repairing a slab foundation?

Usually yes. Repair costs a fraction of slab replacement, which HomeGuide puts at $20,000–$50,000+, and an unrepaired foundation problem makes a home harder to sell.

For the big picture, start with our complete foundation repair cost guide.

Prices are estimates and vary by location and provider. See our methodology and editorial policy. Browse all foundation & water cost guides.