Concrete leveling lifts sunken driveways, sidewalks, and patios back to their original height by injecting expanding polyurethane foam through penny-sized holes — no demolition, no new pour. Heartland Foundation Repair of Kansas City has been lifting and leveling concrete across the KC metro for 40+ years, and most jobs are done in one day for typically less than half the cost of replacement.
Concrete Leveling in Kansas City — Lift Sunken Slabs in One Day
Last updated June 2026
If you've been searching for concrete leveling near you in the Kansas City area, here's the short version: that sunken driveway slab, tilted sidewalk panel, or sagging patio almost never needs to be torn out. Polyurethane concrete lifting raises the existing slab back to level in hours, and the surface is ready to use the same day. We've used this method on homes from Johnson County to Liberty to Lee's Summit, and it's the same technology we use for concrete lifting under settling foundation slabs.
How Polyurethane Concrete Leveling Works
We drill penny-sized holes in the sunken slab, inject expanding polyurethane foam underneath, and the slab rises back to level — the foam reaches about 90% of its full compressive strength within 15 minutes, so the surface is back in service the same day.
Here's the full process. The equipment stays in a trailer rig at the street, with a long hose run directly to the slab — no heavy machinery on your lawn. Injection holes are strategically drilled into the concrete that needs lifting. Polyurethane foam is then injected under the slab, where it expands to fill every void and crack before raising the concrete to the correct level. Because the foam flows freely into voids and then expands to a high in-place density, it creates a solid, monolithic base that doesn't shift or settle afterward.
After the lift is complete, each hole is patched with polymer concrete or cement. The injection work itself typically takes 1-2 hours depending on the scope of the project, and most jobs — drilling, lifting, patching, cleanup — are finished in a single day. The foam is moisture-tolerant, so it can be injected even in wet conditions, and its high-density, closed-cell structure resists water penetration permanently.
Concrete Leveling vs. Mudjacking
Polyurethane concrete leveling achieves the same lift as traditional mudjacking but with a lightweight foam injected through far smaller and fewer holes — and it cures in minutes instead of days. That's why foam lifting has largely replaced mudjacking as the modern standard for concrete raising.
- Hole size — Foam jacking needs penny-sized holes. Mudjacking requires holes roughly the size of a soda can, which are far more visible after patching.
- Weight — Mud slurry adds hundreds of pounds on top of soil that was already too weak to hold the slab. Polyurethane foam weighs a fraction as much, so it lifts without adding load that can cause new settlement.
- Cure time — Mudjacking material can take a day or more to harden. Foam reaches about 90% of full strength in 15 minutes.
- Longevity — Mud slurry can erode and wash out over time, which is why mudjacked slabs often sink again. Closed-cell polyurethane is waterproof and doesn't break down.
- Crew and disruption — Foam lifting is typically done by a two-man crew with a hose, which means less time on site and lower overall job costs.
Concrete Leveling vs. Replacement
Concrete leveling typically costs less than half the price of tearing out and repouring the same slab — and you skip the demolition, the hauling, the damaged landscaping, and the weeks of waiting for new concrete to cure.
The real savings go beyond the pour itself. Replacement means jackhammers, dumpsters, concrete trucks across your yard, and a slab you can't touch for days while it cures — plus the new concrete often won't match the color of the surrounding panels. Lifting the existing slab avoids all of it: the surrounding area stays in use during the project, the original concrete stays in place, and the surface is ready the same day. Replacement only makes sense when a slab is severely cracked or crumbling — and if that's what we find, we'll tell you so at the inspection.
What We Can Lift and Level
Almost any settled slab-on-grade concrete can be lifted: driveways, sidewalks, patios, garage floors, pool decks, porches, and steps.
- Driveways — sunken panels at the garage apron or street, and slabs tilting toward the house and draining water at the foundation
- Sidewalks and walkways — raised or dropped panels that create trip hazards along the path
- Patios — slabs that have settled away from the house or pooled water against the back wall
- Garage and basement floors — interior slabs with voids or settlement underneath
- Pool decks — uneven panels around the water line
- Porches and steps — front stoops and step slabs that have pulled away or sunk
The same injection method also handles slab stabilization and void filling — locking a slab in place before it sinks further, even when a full lift isn't needed. The same polyurethane foam technology also powers our spray foam insulation work across Kansas City.
Why Concrete Sinks in Kansas City
Kansas City slabs sink because they sit on expansive clay that swells when wet and shrinks when dry, compounded by soil washout from poor drainage and 100+ freeze-thaw cycles every winter. When the soil under a slab moves or erodes, a void forms — and the concrete settles into the empty space.
The metro's heavy clay is the same soil that causes most foundation problems here. Downspouts dumping water next to a driveway, a spring storm dropping several inches of rain, or a summer drought baking the clay can all open voids under your concrete. Poorly compacted fill from original construction is another common cause, especially under garage floors and porches. And if a sinking slab is showing up alongside cracks in your basement walls or doors that won't close, the slab may be the symptom of a larger settlement issue — that's when it's worth having our foundation repair team look at the whole picture during the same free inspection.
Before and After Concrete Leveling
The result of a good lift is simple: the slab returns to its original height, the trip hazard is gone, and water drains away from the house instead of toward it. Here's a typical before and after from a Kansas City concrete leveling project.
Before: settled slab with a visible drop-off and trip hazard
After: the same slab lifted back to level and ready for use the same day
Frequently Asked Questions
What's the difference between concrete leveling and mudjacking?
Both lift sunken concrete by pumping material under the slab, but mudjacking uses a heavy sand-and-cement slurry through holes about the size of a soda can, while polyurethane concrete leveling injects lightweight expanding foam through penny-sized holes. The foam cures in about 15 minutes instead of a day or more, weighs a fraction as much, and won't wash out or re-settle the way mud slurry can.
How much does concrete leveling cost in Kansas City?
Most residential concrete leveling jobs in the Kansas City metro fall between about $600–$2,500, and almost always run less than half the cost of tearing out and repouring the same slab. A single sunken sidewalk panel or a small porch slab often lands in the $600–$1,200 range, while a settled garage apron or a two-to-three-panel driveway section is more typically $1,200–$2,500. Pricing is driven by how much polyurethane foam the void takes to fill — we price by the pound of foam injected — so the more a slab has dropped and the larger the void beneath it, the more material the lift requires. We give you a firm written number after a free inspection, not an estimate over the phone.
How is concrete leveling priced — by the slab or by the job?
We price polyurethane lifting by the amount of foam it takes to fill the void and raise the slab, measured by the pound. That's the honest way to quote it: a slab that has dropped half an inch over a small void needs far less foam than one that has sunk four inches over a washed-out base, even if the two slabs are the same size. Because we measure the settlement and probe for voids during the inspection, the written estimate reflects the actual material your job needs rather than a flat per-square-foot guess.
Can you give me a real example of what a job costs?
Sure. A roughly 4x4-foot patio or walkway panel with a minor void and a small drop usually runs about $600–$900. A garage-apron or driveway panel that has sunk three to four inches and left a larger void underneath is more like $1,500–$2,200 because it takes considerably more foam to fill the gap and raise it. A front porch or stoop that has pulled away from the house typically falls in between. Every one of these is still well under what replacing and repouring the same concrete would cost.
Does Heartland warranty its concrete leveling work?
Yes. Our polyurethane concrete leveling carries a 5-Year Workmanship Warranty: if a slab we've lifted settles again within five years due to our work, we come back and re-level it at no charge. The polyurethane foam itself is a closed-cell, waterproof material that doesn't break down, wash out, or compress, so the repair is built to outlast the warranty period — the warranty simply puts that in writing. Ask us for the written terms during your free inspection.
How long does concrete leveling last?
Polyurethane foam is a high-density, closed-cell material that doesn't break down, wash out, or compress over time, so a properly leveled slab can stay level for decades. Because the foam also fills the voids that let the slab sink in the first place, it addresses the cause of the settlement, not just the symptom. Keeping water away from the slab with good drainage helps the repair last even longer.
Can you walk or drive on leveled concrete the same day?
Yes. The polyurethane foam reaches roughly 90% of its full compressive strength within about 15 minutes of injection, so sidewalks and patios are walkable almost immediately and most driveways can be driven on the same day. There is no multi-day cure time like you'd have with new concrete.
What kinds of concrete can be lifted and leveled?
Almost any settled slab-on-grade concrete: driveways, sidewalks, patios, garage floors, pool decks, porches, and concrete steps. Interior floor slabs and commercial slabs can also be lifted. If a slab is severely crumbled or shattered, replacement may be the better option — we'll tell you honestly during a free inspection.
Why is my concrete sinking in the first place?
In Kansas City the usual culprits are expansive clay soil that swells and shrinks with moisture, soil washout from downspouts and poor drainage, poorly compacted fill under the slab, and 100+ freeze-thaw cycles every winter. Any of these can create voids under the concrete, and the slab settles into the empty space.
How big are the injection holes, and will I see them afterward?
The injection holes are about the size of a penny — much smaller than the 2-inch holes traditional mudjacking requires. After the lift is complete, each hole is patched with polymer concrete or cement so the repair blends into the slab.
Is foam concrete leveling safe for the environment and my yard?
Yes. The foam is formulated with a non-ozone-depleting blowing agent, and because the equipment stays in a trailer rig with a long hose run to the slab, there are no trucks driving across your lawn and no demolition debris. Most projects leave the surrounding landscaping completely untouched.
Get a Free Concrete Leveling Inspection
Heartland Foundation Repair of Kansas City has been lifting concrete and fixing foundations in this metro for over 40 years. We'll come out, measure the settlement, check for voids, and hand you a written estimate the same day — free, no pressure, no obligation. Call us at (913) 270-0250, request a free quote online, or contact us with any questions.
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Our Process
is as simple as this:
Schedule a free inspection
We will diagnose your property's foundation issue and explain the best solution(s) available for your time frame, budget and goals. We will never sell you on services you don't need.
Get an Estimate
One of our foundation repair experts will provide you with a fair, written estimate (including financing options) for a professionally installed foundation repair or waterproofing solution customized for your home.
Settle the Work Date
As soon as our proposal is accepted, we will schedule a work date and an estimated time for completion, weather permitting.
Get All Done On Time and In-Budget
We will complete the work on your home with the same level of care, courtesy and professionalism as we would for our own family members.