Concrete Leveling Services

Reviewed 2026-07-30

Concrete leveling raises and stabilizes sunken or uneven concrete slabs. It works on driveways, sidewalks, patios, garage floors, and basement floors without full replacement.

Symptoms concrete leveling solves

A sunken section of driveway, walkway, or patio creating a trip hazard
Visible gaps or a step-off between adjoining concrete slabs
Water pooling on a slab because it no longer slopes correctly for drainage
A garage floor slab that has dropped relative to the foundation or door
Cracking concentrated at the edge of a slab that has begun to sink
A sidewalk or step separating from the house, creating an uneven transition
Settling visible around a slab poured near a downspout or drainage path

When to book concrete leveling

As soon as a slab creates a visible trip hazard or drainage reversal
Before selling a home, since uneven walkways are a common inspection flag
When a slab sinks near a foundation, to rule out a broader settlement issue first
If sinking recurs at the same spot after a previous leveling attempt

What happens during concrete leveling

Contractor inspects the slab and surrounding soil to determine why it settled — poor compaction, erosion, or a drainage issue
Any underlying drainage problem is identified, since releveling without fixing water intrusion often leads to repeat settlement
Small holes (roughly 1–2 inches for mudjacking, 5/8 inch for foam) are drilled through the slab at planned injection points
Material — a cementitious grout slurry or expanding polyurethane foam — is pumped beneath the slab under pressure
The slab is monitored and lifted incrementally until it reaches the correct level and slope
Injection holes are patched and the slab is checked for proper drainage slope before the contractor leaves

Concrete Leveling methods and approaches

Mudjacking (slabjacking)

Pumping a cement-based slurry beneath the slab to fill voids and lift it back to grade — a well-established method, though heavier and slower to cure than foam.

Polyurethane foam injection

Injecting a two-part expanding foam that cures within minutes, lifting the slab with smaller holes and less added weight, making it useful over sensitive soils.

Soil stabilization injection

For slabs settling due to soft or eroded soil beneath them (rather than a simple void), foam or grout is used to both fill voids and densify the surrounding soil.

What drives concrete leveling pricing

Mudjacking: $3–$6 per square foot
Polyurethane foam leveling: $5–$25 per square foot depending on lift height and material volume
Minimum service call charges often apply for small areas (under 20 sq ft)
Severity of the void beneath the slab and how much material is needed to fill it
Whether an underlying drainage or erosion issue needs correcting first
Slab thickness and reinforcement, which affect drilling and injection point spacing
Accessibility of the slab for equipment (driveway vs. tight side yard)

See the full cost guide →

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Questions to ask your concrete leveling or foundation contractor

What caused this slab to settle, and will that cause be addressed before leveling?
Do you recommend mudjacking or polyurethane foam for this specific slab, and why?
How many injection points will be needed, and how large are the resulting holes?
What is the warranty against the slab settling again?
How soon can the area be used for foot or vehicle traffic after the work is done?
Will the finished slab have the correct slope for drainage away from the house?

Concrete Leveling safety and licensing

A slab settling near the foundation, rather than an isolated driveway or walkway, should be evaluated for broader foundation movement before leveling proceeds.
Releveling a slab without correcting an underlying drainage problem often results in the same area settling again within a few years.
Keep the work area clear of foot traffic while pressurized material is being injected, since sudden slab movement can occur during the lift.

Concrete Leveling questions homeowners ask

Is concrete leveling cheaper than replacement?

Yes — leveling typically costs a fraction of full slab replacement since it reuses the existing concrete and requires far less labor, disposal, and material, provided the slab itself isn't badly cracked or structurally failed.

How long does concrete leveling take?

Most residential jobs, such as a driveway section or walkway, are completed in a few hours to a single day, with polyurethane foam allowing traffic on the slab within about an hour of curing.

Will the slab sink again after leveling?

It can, if the underlying cause — typically erosion from poor drainage — isn't corrected. Addressing grading or downspout discharge near the slab as part of the project significantly reduces the chance of repeat settlement.

Problems that lead to concrete leveling

Sources for this concrete leveling guide

ACI (American Concrete Institute) Guidance on Slab Repair Methods
InterNACHI, Concrete Flatwork Inspection Standards
ASTM International Standards for Polyurethane Foam Soil Stabilization