Figuring out your uneven driveway repair cost usually starts the moment you notice a trip hazard or a nasty puddle forming right where you step out of the car. It's one of those home maintenance tasks that's easy to ignore for a few months, but eventually, the sight of a sinking concrete slab or a jagged crack becomes impossible to overlook. The good news is that you don't always have to rip the whole thing out and start from scratch.
Most homeowners end up spending anywhere from $500 to $2,500 for a standard repair, but that's a pretty wide range. The final bill depends on whether you're just patching a few spots, leveling the slabs back into place, or facing a total redo.
Why did it sink in the first place?
Before we talk numbers, it helps to know why the concrete decided to go rogue. Most of the time, it's not the concrete's fault; it's the dirt underneath. If the soil wasn't compacted properly when the house was built, it eventually settles, leaving empty pockets (voids) that the heavy driveway eventually collapses into.
In other cases, it's water. Too much rain or a poorly aimed gutter can wash away the base material. Or, if you live in a place with big trees, roots can grow underneath and lift parts of the driveway while others stay put. Identifying the "why" is crucial because if you don't fix the underlying issue, you'll be paying the uneven driveway repair cost all over again in two years.
Comparing the main repair methods
When you call a contractor, they're likely going to suggest one of three things: mudjacking, polyjacking, or a full replacement. Each comes with a different price tag and level of mess.
Mudjacking (The old-school way)
Mudjacking has been around forever. They drill a few holes (usually about two inches wide) into the concrete and pump in a "slurry"—a mixture of sand, cement, and soil. This heavy mixture fills the void and pushes the slab back up to where it belongs.
It's usually the most budget-friendly option. You might pay between $3 and $6 per square foot. For a typical driveway section, this often lands in the $600 to $1,200 range. It's effective, but the mixture is heavy, which means if the soil was already sinking, adding more weight could potentially cause it to sink again down the road.
Polyjacking (The modern fix)
This is the "new" way of doing things, and it's honestly pretty cool to watch. Instead of a heavy mud mix, they use an expanding polyurethane foam. They drill much smaller holes—about the size of a penny—and inject the liquid foam. As it expands, it lifts the concrete with incredible precision.
Polyjacking is more expensive, typically running $5 to $10 per square foot. You're likely looking at a total of $900 to $2,000. The big benefit here is that the foam is super light and waterproof. It won't wash away, and it won't add extra weight to the soil. Plus, you can usually drive on it within an hour.
Concrete Replacement (The nuclear option)
Sometimes the driveway is too far gone. If the concrete is crumbling, has massive "spider web" cracks, or is over 30 years old, leveling it is like putting a Band-Aid on a broken leg.
Replacing a section or the whole thing is where the uneven driveway repair cost really spikes. You're looking at $8 to $15 per square foot. Between the labor to jackhammer the old stuff out, haul it away, and pour the new mix, a standard two-car driveway replacement can easily hit $5,000 to $10,000.
Factors that shift the price
No two driveways are exactly the same, and contractors will look at several variables before handing you a quote.
- Size of the Voids: If there's a massive cavern under your driveway, it's going to take a lot more material to fill it. Most quotes include a certain amount of "fill," but if they run over, the price goes up.
- Accessibility: Can they get their truck and equipment right up to the spot? If they have to haul gear through a narrow side yard or around obstacles, they'll charge for the extra time and effort.
- Severity of the Sinking: A one-inch drop is a quick fix. A six-inch drop where the slab has wedged itself under a garage lip is a much more technical job that requires more care (and more money).
- Location: Like everything else, labor rates vary by city. If you're in a high-cost-of-living area, expect those per-square-foot prices to lean toward the higher end of the spectrum.
Can you DIY this?
It's tempting to head to the hardware store and grab a few bags of "self-leveling" compound or some bags of cold-patch asphalt. While these are great for filling small cracks or smoothing out a tiny trip hazard, they aren't actually "repairs" for an uneven driveway.
Applying a layer of new concrete over an old, sinking slab is a recipe for disaster. The new layer will eventually crack right along with the old one. If the slab is sinking, you have to address the void underneath. Unless you happen to own a specialized pump for mud or foam, this is one of those jobs where hiring a pro is actually the cheaper move in the long run.
The hidden costs of waiting
It's easy to look at a $1,500 quote and think, "I'll just deal with it next year." But uneven driveways have a way of getting more expensive the longer they sit.
When a slab is tilted, water starts to pool in places it shouldn't. In the winter, that water freezes, expands, and makes the cracks wider. This is called the freeze-thaw cycle, and it's the mortal enemy of concrete. What might be a simple polyjacking job today could turn into a full-scale replacement job after a couple of rough winters.
Then there's the liability side of things. If a delivery person or a neighbor trips on that two-inch ledge on your property, you could be looking at a lot more than just a repair bill.
Is it worth the investment?
When you're staring at a big bill for your uneven driveway repair cost, it helps to think about your home's value. The driveway is the first thing people see. Real estate agents call it "curb appeal" for a reason. A sunken, cracked driveway screams "neglected maintenance," which can make potential buyers wonder what else is wrong with the house.
Most homeowners find that they recoup a significant chunk of the repair cost through increased property value—or at the very least, by preventing a price drop when they eventually sell.
Getting a fair quote
Don't just call the first name that pops up on Google. Get at least three quotes and ask specifically about the warranty. A reputable contractor should stand by their work for at least a couple of years. If the slab sinks again in six months, you want to know they'll come back and make it right without charging you all over again.
Also, ask what they use to fill the holes once they're done. You want someone who takes the time to color-match the patches so your driveway doesn't look like it has a bunch of polka dots all over it.
At the end of the day, dealing with your uneven driveway repair cost isn't the most exciting way to spend a Saturday or your hard-earned money. But once it's done, and you can pull into your garage without that jarring thump, you'll realize it was money well spent. Your car's suspension (and your ankles) will definitely thank you.