When a driveway panel, patio, or sidewalk has sunk but the concrete itself is still sound, you can often lift it back to level for a fraction of replacement cost. Here's what it costs and which method holds up on Waco clay.
If a slab has settled but isn't cracked to pieces, leveling is almost always the smarter spend. A typical residential leveling job runs $500 to $3,000, versus $2,000 to $10,000+ to tear out and repour the same area. You keep the existing concrete, there's no cure-and-wait, and you're usually back to using it the same day.
Leveling only makes sense when the slab is structurally sound — it sank because the ground underneath washed out or compressed, not because the concrete failed. If it's crumbling or cracked across every panel, that's a repair-or-replace question instead.
| Method | Typical range | Notes |
|---|---|---|
| Mudjacking (cement slurry) | $3 – $8 / sq ft | Older method; heavier fill, minimum charges apply |
| Polyurethane foam leveling | $5 – $25 / sq ft | Lightweight, waterproof, cures in minutes |
| Typical single sunken section | $500 – $2,500 per area | Driveway panel, patio, walkway |
| Full replacement (for comparison) | $2,000 – $10,000+ | Only when the slab itself has failed |
Per-square-foot numbers can mislead — contractors price on void depth and lift required, not just surface area. A small slab over a deep void can cost more than a big slab with minor settling.
This is the one decision that matters most here, and it comes back to the Blackland clay. Traditional mudjacking pumps a cement-and-soil slurry under the slab to lift it. It works — but on Central Texas expansive clay it has two problems: the slurry is heavy (100+ lbs per cubic foot), adding load to soil that's already struggling, and it's essentially wet material that can erode, shrink, and wash out in the same wet-dry cycles that sank the slab in the first place.
Polyurethane foam flips both: it's a closed-cell material that weighs about 2 lbs per cubic foot, so it doesn't overload the clay, and it won't absorb water, erode, or dissolve. It also cures in 15–30 minutes versus a day or more for mud. For most Waco-area residential lifts, foam is the more durable choice on our soils — even though it costs more per square foot up front.
Slabs sink because water moved the soil underneath them — a downspout dumping at the slab edge, a driveway that slopes the wrong way, poor drainage pooling against the concrete. Lift the slab without fixing the water and you're buying the same job again in a few years. We look at where the water goes as part of any leveling assessment; see driveway drainage & pooling for the full picture.
Send photos of the settled area and where water drains near it. We'll tell you whether it's a lift or a tear-out, recommend mud or foam honestly, and quote it in writing.
Call (254) 457-3838