Garage floor repair fixes cracked, sunken, or uneven concrete slabs — usually by lifting settled sections back toward level, sealing cracks, and addressing the soil movement underneath. Most Round Rock garage floor jobs run $800 to $6,500 depending on how much of the slab has settled and why. A free evaluation tells you what is actually happening.
Quick Facts
| Typical cost | $800–$6,500 (Central Texas, varies by cause and size) |
| Timeline | Most repairs finish in 1–2 days |
| Best for | Sunken slab sections, wide or lifting cracks, trip hazards, doors that no longer clear the floor |
| Warranty | Warranty coverage depends on the repair type, site conditions, and the terms of the signed agreement |
A garage floor is usually a separate, thinner slab than the rest of your foundation, poured over the same Blackland Prairie clay. When that Taylor Black Clay swells in wet weather and shrinks in a dry Central Texas summer, the garage slab is one of the first places you notice it move.
Signs You Need Garage Floor Repair
You do not need to be a contractor to spot these. Look for:
- One corner or edge of the floor sitting lower than the rest — water pools there after you pull a wet car in
- A crack running across the slab that has a lip you can feel with your foot or catch a broom on
- Cracks that have widened over a season, especially after a dry summer followed by heavy fall rain
- The bottom of the garage door no longer meeting the floor evenly, leaving a gap on one side
- Storage shelves, workbenches, or a parked car that suddenly sit at a slight tilt
- Separation where the garage slab meets the driveway or the foundation wall
One hairline crack in a garage floor is normal and usually cosmetic. Movement you can feel, see growing, or that changes how doors and gaps line up is worth having someone look at.
How Garage Floor Repair Works
Here is what you will see and hear on site.
- Evaluation. We take elevations across the floor to measure exactly where and how much it has settled, and we look at site conditions — drainage, grading, and where water is going — to understand what is actually happening under the slab.
- Repair plan. You get a plain-English explanation of the settled areas, your clear repair options, and a written estimate before any work starts.
- Lifting settled sections. For a sunken slab, we drill small ports and inject material beneath the concrete to raise it back toward level, lifting as much as the structure will reasonably allow. You will hear the drill and see the floor come back up in stages as we check elevations.
- Sealing and finishing. Cracks and injection ports are filled and patched. The floor is usable quickly, and we clean up before we leave.
- Water management. If drainage, grading, or gutters are pushing water toward the slab, we point that out — long-term performance depends on keeping water away from the soil under the floor.
Garage Floor Repair Cost
These are typical Central Texas ranges, not quotes. Your estimate depends on the size of the affected area and the cause.
| Repair | Typical range | What moves the price |
|---|---|---|
| Crack sealing / cosmetic patch | $800–$1,800 | Number and width of cracks, surface prep |
| Slab lifting (single settled section) | $1,500–$3,500 | Square footage lifted, amount of settlement, access |
| Larger or multi-area lifting | $3,000–$6,500 | Total area, depth of void, soil conditions |
| Slab replacement (severe cases) | Quoted after evaluation | Demolition, thickness, rebar, sq ft |
The biggest variables are how much of the floor has settled, how far it has to be lifted, access to the affected area, and whether soil or drainage problems need to be addressed so the fix holds. We label these on the estimate so you can see what is driving the number.
Slab Lifting vs. Full Replacement
Lifting is the better call in most cases — it is faster, less invasive, and costs a fraction of tearing out and repouring. If your garage floor is structurally sound but has settled or cracked from soil movement, lifting the settled areas back toward level usually solves it.
Full replacement makes sense when the slab is badly broken up, crumbling, or has settled so far that lifting will not give you a sound surface. We will tell you honestly if you are in that situation rather than lifting a slab that should be replaced. Most Round Rock garages are candidates for lifting, not replacement.
Local Proof
We are based in Round Rock and work throughout Williamson County and the greater Austin area. References are available on request.
Financing Options
Repairs like this do not always land at a convenient time. Financing is available subject to credit approval, and we accept all major credit cards. See our financing page for details, or ask when you schedule your evaluation.
Frequently Asked Questions
Is a cracked garage floor a serious problem?
Not always. A thin, stable hairline crack is usually cosmetic. A crack with a lip you can feel, one that is widening, or a floor section that has visibly sunk is worth having evaluated, because it points to soil movement under the slab.
Can you lift a sunken garage floor back to level?
In most cases, yes. We drill small ports and inject material under the slab to raise the settled areas, lifting as much as the structure will reasonably allow. It will not always return to perfectly flat, but it removes trip hazards and restores drainage and door clearance.
Why does my garage floor keep cracking in Round Rock?
The Taylor Black Clay under most Central Texas homes swells when wet and shrinks when dry. A dry summer followed by a wet fall moves the soil, and a thin garage slab shows that movement as new or widening cracks. Managing water around the slab helps reduce the risk of continued movement.
How long does garage floor repair take?
Most crack and slab-lifting jobs finish in one to two days, and the floor is usable shortly after. Larger areas or replacement take longer, and we give you a realistic timeline with your estimate.
Do you charge for the estimate?
No. Estimates are free for homeowners and commercial properties. We come out, take elevations, look at what is happening, and give you clear repair options in writing.
Will fixing the garage floor stop it from happening again?
Repair stabilizes and lifts the affected areas and, combined with good drainage and grading, helps reduce the risk of future movement. Because the soil here is active, we will also point out any water issues that affect long-term performance.
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Ready to find out what is going on under your garage floor? Schedule an inspection or call (512) 746-7223 and we will come take a look.
Related: Concrete Slab Repair · Foundation Repair · Drainage & Water Management