In this guide
- Typical Cost to Raise Concrete
- What Is Concrete Raising?
- How the Main Concrete-Lifting Methods Compare
- Mudjacking and Cementitious Slabjacking
- Polyurethane Foam Injection
- Example Costs by Project Size
- Factors That Affect Concrete Raising Cost
- When Raising Concrete Makes Sense
- How to Compare Contractor Estimates
- Concrete Raising vs. Replacement
- Ways to Manage the Cost
- Frequently Asked Questions
- Is concrete raising cheaper than replacement?
- How long does concrete raising take?
- How long does a raised slab last?
- Can homeowners raise concrete themselves?
- Sources and Further Information
Raising concrete typically costs about $3 to $25 per square foot, though many contractors set a minimum charge that makes small jobs cost more per square foot. The final price depends on the slab’s size, thickness, condition, access, and the repair method. Concrete leveling can restore an uneven driveway, sidewalk, patio, or garage floor without the expense and disruption of replacing the entire slab. Knowing how contractors price the work helps homeowners compare estimates and spot repairs that may need more than lifting.
Typical Cost to Raise Concrete
For many U.S. residential projects, concrete raising costs approximately $3 to $25 per square foot. The wide range reflects differences in equipment, materials, slab condition, location, and the amount of lifting required. Smaller jobs may fall below a contractor’s minimum service charge, while complicated repairs can exceed typical per-square-foot estimates.
Traditional mudjacking, also called cementitious slabjacking, often costs around $3 to $8 per square foot. Polyurethane foam injection commonly runs about $5 to $25 per square foot. These are broad planning ranges rather than guaranteed quotes; local labor and job conditions can shift them significantly.
Some companies price by the project instead of by the square foot. A small sidewalk repair might cost a few hundred dollars, while raising a large driveway or garage slab can cost several thousand. Ask whether a quote includes inspection, drilling, patching injection holes, cleanup, and any applicable minimum fee.
| Repair type | Typical planning range | Common considerations |
|---|---|---|
| Mudjacking or cementitious slabjacking | About $3–$8 per square foot | Uses a cement-based slurry; may suit larger, accessible slabs. |
| Polyurethane foam injection | About $5–$25 per square foot | Uses expanding foam; often requires smaller injection holes. |
| Concrete replacement | Varies widely by demolition, disposal, and new installation | May be necessary when the slab is badly broken or unstable. |
Important: A low estimate is not automatically the best value. The contractor must identify why the slab sank and determine whether the ground below it can support the repaired concrete.
What Is Concrete Raising?
Concrete raising is a repair method that lifts a settled slab by injecting material beneath it. The material fills voids, supports the slab, and pushes it toward a more even position. Contractors may call the process concrete leveling, slab lifting, mudjacking, slabjacking, or polyurethane foam lifting.
It is generally used for relatively intact slabs that have settled or become uneven. Common examples include a sunken driveway panel, a trip hazard on a sidewalk, a settled patio, or a garage floor that no longer meets the driveway evenly. Raising can be less disruptive than removing and replacing concrete, but it cannot restore a slab that has extensive structural damage.
How the Main Concrete-Lifting Methods Compare
Mudjacking and Cementitious Slabjacking
In mudjacking, a contractor drills holes through the slab and pumps a cement-based slurry beneath it. The slurry fills gaps and lifts the concrete. The contractor then plugs the holes with patching material. The mixture may include soil, sand, cement, and other components, so its exact makeup varies by provider.
Mudjacking can be a practical option for large, accessible slabs, and its upfront price is often lower than foam injection. The slurry is heavier than polyurethane foam, however, and its suitability depends on the soil and slab. Ask the contractor how the material will drain or cure and whether the added weight could affect already weak ground.
Polyurethane Foam Injection
Polyurethane concrete lifting uses small drilled holes to inject expanding foam below the slab. As the material expands, it fills voids and raises the concrete. The holes are usually smaller than those used for mudjacking, which can leave less noticeable patches. Foam is lightweight and typically cures quickly, although the exact return-to-use time depends on the product and the contractor’s directions.
Foam lifting often costs more per square foot than mudjacking. It is not automatically the right choice for every repair: the contractor should consider the slab, soil, drainage, load, and location before recommending it. Homeowners should ask what type of foam is used and whether the product is appropriate for the specific application.
Example Costs by Project Size
The following examples apply broad per-square-foot ranges to help with early budgeting. They are not quotes. Minimum charges, regional labor rates, slab thickness, access, and the amount of lifting can make a small repair disproportionately expensive.
| Example area | Approximate size | Illustrative cost range |
|---|---|---|
| Small sidewalk section | 20 square feet | $60–$500, before minimum charges |
| Patio section | 150 square feet | $450–$3,750 |
| Driveway area | 400 square feet | $1,200–$10,000 |
The upper ends are not typical prices for every job. They show how wide published per-square-foot estimates can be when a repair is difficult or uses a higher-cost method. A contractor may instead quote a single project price after inspecting the site.
For a meaningful comparison, homeowners should request itemized estimates from at least two or three qualified local contractors. Estimates should describe the repair area, lifting method, material, price, expected result, warranty, and exclusions. A contractor may not be able to promise a perfectly level surface, especially if the slab has warped or neighboring concrete is uneven.
Factors That Affect Concrete Raising Cost
- Slab area and thickness: Larger or thicker slabs may require more material, labor, and equipment time.
- Amount of settlement: A slab that needs substantial lifting or support may require more injection material and careful staging.
- Concrete condition: Cracks, broken edges, or several separated sections can complicate the work. Severely damaged concrete may not be a good candidate for raising.
- Access: Tight spaces, obstacles, limited vehicle access, or the need to protect landscaping can add labor and setup time.
- Soil and drainage: Erosion, washout, expansive soil, or poor water management can cause repeat settlement unless the underlying problem is addressed.
- Location: Labor rates, travel distance, local demand, and regional building conditions affect quotes.
- Minimum service charges: Mobilizing a crew and specialized equipment costs money, so small repairs may have a minimum price.
- Additional repairs: Drainage correction, joint sealing, crack repair, or removal of badly damaged concrete may be priced separately.
When Raising Concrete Makes Sense
Concrete raising is most suitable when the slab is largely intact but has settled, creating an uneven surface or an unwanted gap. It may improve access, reduce a tripping hazard, and help restore drainage away from a building. For a driveway or walkway, lifting can also avoid the demolition and disposal involved in replacing a larger area.
Not every uneven slab should be lifted. A contractor may recommend replacement if the concrete is extensively cracked, crumbling, broken into unstable pieces, or too thin to support the repair. Raising also may not solve the problem if soil continues to erode or water keeps washing material away. The cause of settlement matters as much as the visible height difference.
Concrete lifting is not a substitute for a structural assessment when movement affects a foundation, retaining wall, or other structural component. In those cases, a qualified structural engineer or foundation specialist may need to assess the site before repair work begins.
How to Compare Contractor Estimates
A responsible contractor should inspect the slab and surrounding conditions rather than quote solely from a photo. Homeowners can use these questions to understand what a proposal includes:
- Which lifting method and material will be used, and why does it fit this slab?
- Does the price include drilling, injection, hole patching, cleanup, and tax?
- Is there a minimum charge, and could extra material or labor change the price?
- How much lift is expected, and what result can the contractor reasonably guarantee?
- Will the repair address the cause of settlement, or is separate drainage or soil work needed?
- What does the written warranty cover, and what conditions are excluded?
- How soon can the slab be walked or driven on after the work?
Homeowners should check licensing requirements where applicable, insurance coverage, business references, and reviews. They should also get the scope and warranty in writing. A warranty may cover workmanship or renewed settlement under defined conditions; it may not cover damage caused by drainage problems, soil movement, or unrelated structural defects.
Concrete Raising vs. Replacement
Raising can preserve usable concrete and reduce demolition, hauling, and replacement work. Replacement may be the better long-term choice when a slab is badly deteriorated, has widespread structural cracks, or cannot be lifted safely. The least expensive immediate option is not always the lowest-cost option over time if the slab is likely to fail or the underlying cause remains uncorrected.
When comparing proposals, homeowners should compare the full repair scope—not just the price per square foot. A replacement estimate may include demolition, disposal, base preparation, reinforcement, new concrete, finishing, and curing time. A lifting estimate may address only the slab’s height and support. The correct comparison depends on the condition of the concrete and the work each contractor includes.
Ways to Manage the Cost
Fixing drainage problems early can help limit future erosion and settlement. Downspouts should direct water away from slabs and foundations, and water should not pool beside concrete. Sealing joints may help reduce water entry, but it does not correct every soil or drainage issue. A contractor can advise whether grading, a drain, or another measure is appropriate.
Bundling nearby areas into one visit may reduce the effect of minimum service charges, although each section still needs an appropriate repair. Homeowners can also ask whether the contractor offers a free inspection, written estimate, or a separate price for optional work. They should avoid paying for unnecessary services or assuming that a cosmetic patch will fix a sinking slab.
Frequently Asked Questions
Is concrete raising cheaper than replacement?
It is often less expensive than replacing a sound but settled slab because lifting may avoid demolition and disposal. The comparison depends on the slab’s condition, the repair method, and whether the underlying cause needs separate work. Extensive damage can make replacement the more practical option.
How long does concrete raising take?
Many residential lifting jobs can be completed in a few hours, but project size, access, preparation, and material curing affect the schedule. Contractors should give specific instructions about when the repaired surface can be used.
How long does a raised slab last?
There is no universal lifespan. Results depend on the slab, material, installation, soil stability, and water management. Ask the contractor what the warranty covers and what site conditions could lead to renewed settlement.
Can homeowners raise concrete themselves?
Professional lifting uses specialized pumps, materials, and controlled injection. An improper lift can crack a slab, raise it unevenly, or cause damage. For a substantial slab or a safety-related trip hazard, a qualified contractor is generally the safer option.
Sources and Further Information
Published prices vary by market and job conditions. For additional background and local estimates, consult the Angi Cost Guide and the Concrete Network. Homeowners should treat online ranges as starting points and rely on written, site-specific estimates for a final budget.