Basement floor repair addresses cracked, uneven, or settled concrete floor slabs, usually by sealing cracks, filling voids under the slab, or lifting sunken sections back toward level. In the Round Rock area, most jobs run $500 to $6,000 depending on cause, square footage, and whether the floor has actually moved or just cracked at the surface.
Quick Facts
| Typical cost | $500–$6,000 (Central Texas range) |
| Timeline | Most repairs 1–2 days; larger lifts may run longer |
| Best for | Cracked, sunken, or uneven basement concrete floors |
| Warranty | Warranty coverage depends on the repair type, site conditions, and the terms of the signed agreement |
Basements are uncommon in Central Texas because of our shallow, expansive soils, but they do exist here, and the floors behave a lot like a slab-on-grade would. Before we quote anything, we want to understand what is actually happening under the concrete, not just patch what shows on top.
Signs You Need Basement Floor Repair
You do not need to diagnose the cause yourself. If you are seeing any of these, it is worth having us take a look:
- Cracks running across the floor, especially ones wider than a credit card
- One area of the floor sitting noticeably lower than the rest
- A rocking or hollow sound when you walk across a section
- Gaps opening between the floor slab and the base of a wall
- Doors inside the basement sticking or dragging on the floor
- Water pooling in a low spot after rain
- Furniture or appliances that no longer sit level
A single hairline crack is often just concrete shrinkage and nothing to worry about. Movement, separation, and settled areas are the ones that tend to get worse.
How Basement Floor Repair Works
Here is what you will actually see and hear on site:
- We evaluate the floor. We take elevations across the slab so we can see the settled areas and understand the site conditions, rather than guessing from a crack or two.
- We identify the cause. Soil movement, a void under the slab, poor drainage, or a plumbing leak affecting the soil all get handled differently. If needed, we recommend a hydrostatic plumbing test to rule out leaks.
- We give you a plain-English explanation and clear repair options before any work starts.
- We do the repair. Depending on the cause, that may mean sealing and filling cracks, injecting material to fill voids and lift a sunken section, or stabilizing the affected area.
- We check drainage and gutters. Long-term performance depends on water management, so we point out anything moving water toward the foundation.
Basement Floor Repair Cost
Pricing depends on why the floor moved and how much of it is affected. These are typical Central Texas ranges, not a flat quote:
| Repair type | Typical range | What moves the price |
|---|---|---|
| Crack sealing / surface repair | $500–$1,500 | Number and width of cracks, floor area |
| Void filling under slab | $1,500–$4,000 | Square footage, depth of voids, access |
| Slab lifting (sunken sections) | $2,000–$6,000 | Amount of settlement, material volume, access |
| Drainage correction | $800–$3,000 | Grading, gutter work, severity |
The biggest cost drivers are how much the floor has settled, the square footage involved, access to the work area, and the underlying cause. A floor that cracked from normal shrinkage is a very different job from one settling over a void.
Basement Floor Repair vs. Full Slab Replacement
Replacement is not always the right call. If the slab is structurally sound and has simply cracked or settled in spots, sealing, void-filling, or lifting is usually less disruptive and less expensive. Full replacement makes more sense when the concrete is badly deteriorated, crumbling, or has failed across most of the floor. We will tell you honestly which situation you are in based on the elevations and what we find under the slab.
Local Proof
References are available on request, and every estimate is free for homeowners and commercial properties.
Financing Options
Repairs like this are rarely planned for. Financing is available, subject to credit approval, and we accept all major credit cards. See our financing page for details, and ask about discounts for military, first responders, firefighters, law enforcement, nurses, retired teachers, and seniors.
Frequently Asked Questions
Are all basement floor cracks a problem?
No. Thin hairline cracks are often just concrete shrinking as it cured. Cracks that are widening, uneven from side to side, or paired with a settled area are the ones worth evaluating.
Why is my basement floor sinking?
Usually soil movement or a void under the slab. In Central Texas, expansive Taylor Black Clay swells and shrinks with wet and dry seasons, and a dry summer followed by heavy fall rain often shows up as new movement.
Can you lift a sunken basement floor back to level?
We can lift settled sections as much as the structure will reasonably allow. The goal is to stabilize the affected areas and improve the floor, not to promise a perfectly level result.
Do I need a plumbing test first?
Sometimes. If we suspect a leak is affecting the soil under the slab, we recommend a hydrostatic plumbing test so we are repairing the real cause, not just the symptom.
How long does the repair take?
Most crack and void repairs are done in one to two days. Larger lifts or drainage work can take longer, and we will give you a realistic timeline with your estimate.
Is the work reviewed by an engineer?
When the situation calls for it, the elevations and repair plan can be engineer-reviewed, with final documentation provided where required.
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Related: Concrete Slab Repair · Foundation Drainage · House Leveling
Ready to find out what is actually happening under your floor? Schedule an inspection or call (512) 746-7223 to talk through your repair options.