Concrete leveling cost (2026 prices per SF)

Concrete leveling cost depends on the method and on what’s under the slab. We lift with polyurethane foam, and you get a firm number for the lift once we’ve looked at the slab. A photo can’t show the hollows under it. Their shape, and how far the slab sank, set how much foam goes in. Mudjacking, the older cement-slurry method, runs $3 to $6 a square foot. A tear-out and new pour runs $8 to $15^[1] a square foot.

Leveling exists because moving a sound slab back up costs far less than a new one. Lifting one sunken panel is usually a one-day job. Some people call it concrete lifting. Either way, it’s for a sunken garage apron, a driveway panel that dropped an inch, or a walkway that started catching toes. A new slab’s price counts the forms, the demo, the haul-off, and a 7 to 28 day cure wait. If your slab ends up there, concrete slab cost has the repour side of the math.

Which method fits a settled slab?

Price is only one of the things that split those rows. The other three are weight, speed, and control.

Weight comes first. Foam cures at 2 to 4 pounds per cubic foot. Slurry weighs over 100 pounds per cubic foot, more than 25 times as much, and every pound of it goes into ground that already showed it couldn’t hold the slab. Speed is next: foam sets in 15 to 30 minutes, and slurry needs 24 to 48 hours. Control matters most when a polish or coating is coming later.

What moves the price on a leveling job?

Six things set the number on a lift:

1. How far the slab has to come up. A bigger lift takes more foam, and foam is what the pump moves.
2. The shape of the voids, the empty pockets under the slab. One hollow under a corner takes less foam than a dozen small pockets that each need their own hole, even when the slab dropped the same inch.
3. The slab’s size, and how easy it is to reach. A driveway panel at the street is a different day than an interior floor behind finished walls.
4. The method. Foam costs more per cubic foot than slurry, and the table above shows when each one earns its price.
5. What made the slab sink. Most estimates leave this one out. Dirt that wasn’t packed down at the first pour is done moving, and a lift closes the book on it. A downspout dumping water at the slab edge, or a slow plumbing leak, is still at work. Lift a slab over a cause that’s still going and you buy a season or two, no more.
6. The drive cost, our trip to your site. It gets its own line on the quote, worked out from your project address.

What does the extra cost of foam buy?

Foam injection starts with 5/8-inch holes drilled through the slab. We place them where the hollows are, not on a grid. The polyurethane goes in as a liquid. It swells against the soil, fills the hollow, and keeps pushing until the slab starts to rise. The crew watches the height the whole time. We raise the slab an eighth of an inch at a time, so a panel comes back to level instead of past it. The foam can carry weight in 15 to 30 minutes, so most home slabs can take a car again in an hour or two. The crew patches the holes flush with the slab before we leave. Foam does cost more per cubic foot than slurry. The extra buys a fill that weighs 2 to 4 pounds per cubic foot instead of over 100, a slab that’s usually back in use the same day, and a surface flat enough to measure afterward.

That last part decides the jobs we care about most. A slab headed for polish, epoxy, or an overlay has a flatness number it has to meet. A lift that overshoots by a quarter inch becomes the finishing crew’s problem.

Where does mudjacking still make sense?

Mudjacking runs $3 to $6 a square foot, and on the right slab that’s a fair buy. Slurry was made for a big hollow under firm soil that drains well. If the slab is a shop apron nobody plans to coat or polish, the cheaper method can be the right one.

The trade-offs show up in three places. The holes run 1.5 to 2 inches across, against 5/8 inch for foam, so the patches show and keep showing. The cure keeps the slab out of use for a day or two, not minutes. And the weight settles most arguments. Pumping over 100 pounds per cubic foot of wet slurry into soil that gave way once is a bet that the soil acts differently the second time.

When does replacement beat another lift?

A slab that still moves as one piece is almost always a lift candidate. Run yours through this quick check:

• It dropped less than 2 to 3 inches and it’s still one piece: lift it.
• It dropped more than 2 to 3 inches: replace it.
• It cracked into pieces that move on their own: replace it. Lifting one piece just widens the crack in the next one.
• The soil under it is still failing (water running under it, washouts, a sinkhole): replace it. Foam fills a hollow, but it can’t outrun the cause.

People argue most about the broken slab, because the top still looks like it could lift. It can’t. If yours lands on the replace side, we’d rather tell you now, while the estimate is still being written. Concrete slab cost has the numbers for a new one.

Inside a leveling quote

In our calculator this is the Concrete Leveling series. A leveling quote from us covers these steps:

• A look at the slab and a measure of how far it dropped
• Laying out the injection holes, each 5/8 inch across
• The foam itself, and pumping it in
• Watching the height the whole time the slab rises
• Patching the holes flush with the slab
• The usual drive cost to your site

It doesn’t cover drainage work past the spot we inject. It doesn’t cover fixing cracks that run all the way through the slab, or moving your stored things and equipment off it. Any finish after the lift is separate too. Polish, coating, and overlay are their own job and their own number.

Nothing sits in the wings to surprise you later. It’s on the quote or it isn’t. If our look at the slab turns up a drainage problem, you hear about it while the price is still being written.

How do you get a real number on your slab?

There’s no charge for a leveling estimate. Call (888) 852-3528 and tell us the slab size and about how far it dropped. We price a lift after we see the slab, because the hollows under it don’t show from the top.

If you want to talk about what made it sink before anyone lifts a thing, we’ll start there.

Why do two leveling bids come in so far apart?

Two bids land far apart when one bidder looked for the cause and the other just priced a lift.

Finding the cause takes time on site. Sometimes it ends with advice that costs the bidder the job, and that’s a real reason a cheap estimate skips it. But the hollow under your slab is a sign of a problem, and something made it. Dirt that wasn’t packed down at the first pour, a downspout dumping water at the slab edge, a slow plumbing leak: those are the usual three. Only the loose dirt from the first pour is done doing damage. The water and the leak keep working. A bid that never asks which one you have only priced the half of the problem you can see. The rest is left with you. Foam isn’t expensive for what it does. A second lift eighteen months after the first one is expensive, because it still does nothing about the cause.

We’ve re-lifted concrete for people whose first contractor skipped that question. The second lift never feels like a bargain.

Related pages

• Concrete leveling: the foam injection process, start to finish.
• Concrete repair cost: prices for surface damage on a slab that sits at the right height and needs no lift.
• Concrete overlay cost: a new surface for a slab that sits level but looks rough.
• Concrete slab cost: full repour prices.
• Polished concrete: where many leveled slabs end up next.