Slab Leveling and Pressure Grouting Costs in Austin

$4 to $8 per square foot for mudjacking, with most Austin projects between $749 and $2,042 and an average of $1,352. A few more published figures for the metro:

• Sunken driveway, 200 to 600 sq ft: $900 to $3,000 to raise
• Small jobs under 100 sq ft: often a minimum charge of around $400
• Raising or leveling concrete generally: $5 to $25 per square foot

Polyurethane foam is priced by the job rather than by the foot by the one Austin-area leveling contractor that publishes numbers, and its tiers are Texas-wide rather than Austin-only: $500 to $1,200 for a single sidewalk section or small stoop, $1,200 to $3,000 for a driveway section or patio, and $3,000 to $6,000 or more for a full driveway, multiple slabs or a pool deck. The same company puts the average residential job across the Austin, Houston, San Antonio and Dallas-Fort Worth markets at $1,500 to $3,500. Those are published ranges, not a quote: only the pro who sees the slab can price yours. The Austin concrete price guide covers new pours.

They do different jobs, and the Texas engineering guidelines separate them in one sentence. Grouting provides continuous slab support without lifting appreciably; mudjacking adjusts the elevation of a foundation hydraulically while giving continuous uniform support. So if a slab has a void under it but still sits where it should, grouting fills the void. If the slab has dropped and has to come back up, that is mudjacking. Those guidelines list the slab repair methods a Texas engineer chooses between as underpinning, grouting, mudjacking, crack injecting, tendon stressing, and partial demolition and reconstruction, and note that grouting or mudjacking can sit on temporary support over shallow footings or long-term support over deep piles or piers.

One warning from the same section is worth asking about by name: grouting or mudjacking should not be done beneath an underpinned foundation if the soil in the injected area is expected to swell enough to damage the structure. On Austin clay that is a live question, not a theoretical one. Whether a crack in the same slab needs injecting is covered on the crack repair page.

That is the claim the foam companies make, and it rests on two differences. Published Austin cost data describes polyjacking as using polyurethane foam instead of a cement slurry: more expensive, but a lighter and longer-lasting lift. An Austin-area leveling contractor puts it more directly, saying that unlike soil or mudjacking slurry the foam will not wash away. Foam jobs are also faster and less invasive. One Austin specialist drills 5/8-inch holes through the sunken slab rather than breaking it up, patches them when the lift is done, and says the surface is ready to use before the crew leaves; another says most jobs finish in two to four hours. Read warranty terms as what they are, a company's own promise, and get the length and what voids it in writing.

When the slab itself is finished. An Austin-area leveling contractor is straightforward that if the concrete is badly cracked or broken into multiple pieces, leveling alone may not be enough, and that severely deteriorated concrete may need partial replacement. Published Austin cost data agrees from the other direction: where concrete is unlevel, sinking or has structural problems, replacement may be the better long-term option, and replacing damaged slab sections runs $10 to $15 per square foot.

The money comparison depends on whose numbers you use. The same Austin-area leveling company puts leveling at $5 to $25 per square foot against replacement at $12 to $35 including demolition, hauling, forming, pouring and finishing, and works a 400 square foot driveway as $2,000 to $3,500 for foam against $8,000 to $14,000 for a tear-out and repour, plus the three to seven days the driveway is out of use while it cures. That replacement figure is a leveling company's own comparison and it sits well above what Austin concrete contractors publish for new work: a broom-finish driveway is $6 to $10 per square foot, with tear-out of the old slab adding $1 to $3 on top. Price both ways before you decide, and see the concrete removal guide for what demolition actually costs here.

Three things people forget. First, plumbing: the Texas guidelines say water supply and sanitary drain lines should be tested for leaks if jacking or lifting is part of the remedial work, and that leaks found that way should be repaired. Ask who pays for that test. Second, expectations about level. On elevation adjustments the guidelines say flatly that it is unlikely the adjustment will result in a level foundation, and that lifting should be governed by field judgment to limit damage to the slab and finishes. Third, the cause. A lift puts the slab back; it does not change the soil that moved. Keeping soil moisture close to uniform around a foundation is the measure those engineers tell clients about, and the crack repair page covers how Austin's watering restrictions shape that. The hiring guide lists what a written quote should name line by line.

Not for flatwork on your own lot in Austin, where sidewalks and driveways outside the public right-of-way need no building or Driveway/Sidewalk permit. Work on the approach, sidewalk, curb or gutter in the right-of-way does, and only a company holding a Right-of-Way Contractor License may perform it. House foundations are a different matter in the suburbs: Kyle requires a permit for foundation repair plus an engineered design and a sealed engineer letter at inspection, and tells homeowners to see the permit before work starts. Before anything is drilled or dug, call 811 for a utility locate, and in Kyle request the city's own water, wastewater and stormwater lines separately, because they are not part of that ticket.