How Much Does Foundation Repair Cost in 2026?

Foundation repair cost by repair type

What you pay depends almost entirely on what is wrong. A hairline crack is a small job. A sinking corner that needs steel piers is a big one.

Source: This Old House, Oct 2026.

NerdWallet’s figures line up closely: an average of just over $5,000, with most jobs between about $2,200 and $8,100. A full foundation replacement is a different scale entirely, at $20,000 to $100,000.

Cost by how serious the damage is

NerdWallet groups repairs by severity, which is a handy way to read a contractor’s diagnosis.

Source: NerdWallet, Feb 2026.

The gap between minor and major is the strongest argument for acting early. This Old House notes that a hairline crack costs $250 to $800 to fix, while neglected damage can reach $10,000 to $15,000 or more.

Fixing a sinking foundation

Sinking or settling is where the bills climb, because the fix has to reach stable soil.

• Mudjacking. Pumping a slurry under a sunken slab costs $3 to $8 per sq ft, or about $350 to $800 for the job, per Inch Calculator.
• Foam jacking. Polyurethane foam costs about $25 per sq ft, or $2,350 to $2,500 for a 100 sq ft area.
• Piers. Steel or concrete piers driven to firm soil cost $1,000 to $3,000 each, per This Old House. A job that needs 8 piers would run $8,000 to $24,000 (our calculation).

Inch Calculator says hydraulic pier jobs land around $10,000 in most cases. Bowing basement walls cost $5,000 to $7,000 to correct.

Signs you may need foundation repair

Foundation problems usually announce themselves slowly. This Old House groups the warning signs into three sets.

Early signs:

• Doors or windows that stick, especially in certain seasons.
• Floors that slope slightly.
• Small hairline cracks in walls.

Outside the house:

• Water pooling near the foundation after rain.
• Horizontal or stair-step cracks wider than a quarter inch.
• Gaps between the soil and the foundation.
• Trim pulling away from the walls.

Inside the house:

• Diagonal cracks running from the corners of doors and windows.
• Growing gaps between walls, ceilings or floors.
• Tile or grout that keeps cracking after repair.
• Uneven or sagging floors.

One sign on its own is not proof of a structural problem. Houses settle, and many hairline cracks are cosmetic. Several signs together, or cracks that keep getting wider, are a reason to call an engineer. A simple way to track a crack is to mark its ends with a pencil and the date, then check it again in a few months.

Extra costs to budget for

Sources: This Old House, Oct 2026; Inch Calculator, Aug 2023 (drainage).

Engineer prices vary by source. NerdWallet cites 2026 Angi data of $1,500 or more for a residential structural engineer, so ask for a quote up front. It is still money well spent: an engineer has nothing to sell you, while a repair company’s “free inspection” may overstate the problem, as NerdWallet warns.

What drives the price

• Soil. Expansive clay swells and shrinks with moisture, so homes on clay often need more extensive work.
• Foundation type. This Old House says costs are similar across most types, except pier-and-beam and stone. Basements tend to be among the priciest; NerdWallet puts basement repairs at about $2,300 to $7,600.
• Access. Crawl spaces and tight lots slow the crew. Inch Calculator says lifting a house for crawl space access can cost $10,000 or more.
• Climate. Freeze-thaw cycles, coastal erosion and earthquakes all add risk and cost.
• How long you wait. Small problems grow, and water makes everything worse.

How to pay less

1. Fix the water first. Gutters that dump at the foundation and soil that slopes toward the house cause many problems. Drainage fixes are often far cheaper than structural work.
2. Hire an independent engineer before you call repair companies. Their report gives every contractor the same scope to bid on.
3. Get at least three written bids. Compare the method, the number of piers and the warranty, not just the total.
4. Ask about the warranty. Find out how long it lasts and whether it transfers to a new owner, which can help when you sell.
5. Keep an emergency cushion. Foundation work is rarely planned. An emergency fund sized for a big home repair keeps you from financing it on a credit card.

Buying a home with foundation issues?

A standard inspection can spot warning signs, but it is a visual check. If the report flags cracks or sloping floors, budget for an engineer’s visit before you close. Our home inspection cost guide covers what a foundation add-on inspection costs.

Foundation work also tends to come with other big-ticket items in older homes. Compare the roof replacement cost and window replacement cost if you are planning the year’s repairs.

See how we research every number on our method page, or browse more home and repair costs.