How Can I Fix My Sunken Driveway Without Replacing the Whole Thing?
You almost never have to replace an entire driveway to fix a sunken one. Concrete driveways are poured in separate sections divided by control joints, and those sections settle independently -- so the settled ones can be lifted back to grade with polyurethane foam while the rest of the driveway is left untouched. A typical sectional lift runs $1,200 to $3,000, takes about two hours, and you can drive on it the same day.
Key Takeaways
- Concrete driveways are poured in sections separated by control joints, and each section settles on its own -- so each one can be repaired on its own.
- Lifting only the settled sections costs a fraction of replacing the driveway, and typically runs $1,200 to $3,000 in the Twin Cities.
- Lifting keeps your existing concrete, which means no color mismatch against the sections that never moved.
- A section can be lifted if it is still solid -- one crack running through it is usually fine, but concrete broken into several loose pieces needs replacement.
- Replacing a single section is often the worst option of the three, because it costs more than lifting and leaves a permanent color difference.
Your Driveway Is Already Divided Into Sections
Look at your driveway and you will see lines running across it at regular intervals. Those are control joints, cut into the concrete when it was poured so that cracking happens along a straight planned line instead of randomly across the surface.
Those joints do something else that matters here. They divide your driveway into separate slabs that move independently of each other. When the soil under one section erodes, that section drops -- and the sections next to it stay exactly where they are.
This is why sunken driveways usually look like a staircase rather than a hill. One panel is low, its neighbor is not, and there is a lip between them. It also means the repair can be just as targeted as the problem.
Why Only Some Sections Sink
Sunken concrete is a soil problem, not a concrete problem. The slab did not fail -- the ground beneath it washed out, compacted, or eroded, leaving a void that the concrete eventually dropped into.
That erosion is almost always local. A downspout empties near one corner of the driveway. A section sits over backfill from the foundation trench while the rest sits on undisturbed ground. A utility line was run under one spot and the trench was never compacted the way the surrounding soil was.
Minnesota's freeze-thaw cycle then works on whatever void exists. Frost regularly drives three to four feet deep in the Minneapolis metro, and the Twin Cities see roughly 100 degrees of temperature swing between summer and winter. Every cycle lifts the slab slightly and lets it settle again, and each pass makes an existing void a little larger. The sections sitting over good soil stay put through all of it.
Can You Lift Just the Sunken Sections?
Yes, and that is the standard way this repair is done.
Polyurethane foam is injected through ports about the size of a dime drilled into the settled section only. The foam expands beneath the concrete, fills the void completely, and raises that section back to match the ones around it. The sections that never moved are not drilled, not touched, and not billed for.
A driveway with three settled panels out of twelve is a three-panel job. There is no technical reason to lift concrete that is already sitting at the right elevation, and no honest reason to charge for it.
Which Sections Can Be Lifted and Which Cannot
The test is whether the section dropped or whether it failed.
A section that dropped is still a solid piece of concrete sitting too low. It can be lifted. A single crack running through an otherwise intact panel does not disqualify it -- the halves are raised together and the crack is sealed afterward.
A section that failed has come apart. If a panel has broken into three or four loose pieces that move independently when you step on them, if the surface is spalling and flaking apart, or if the concrete is so thin it cannot carry a lift, that section needs to be replaced rather than raised.
Most driveways in the Minneapolis metro are a mix, and the honest answer is often that ten sections can be lifted and one needs to go. A contractor should be willing to tell you which is which and why.
Lifting Sections Versus Replacing Them Versus Replacing Everything
There are three real options in front of you, and the middle one is the one most homeowners overestimate.
| Lift the Settled Sections | Replace Just Those Sections | Replace the Whole Driveway | |
|---|---|---|---|
| Typical cost | $1,200 to $3,000 | More than lifting, less than full replacement | Several times the cost of lifting |
| Time on site | About two hours | One to two days | Several days to a week |
| Drive on it | Same day | Seven days minimum | Seven days minimum |
| Appearance | Existing concrete, unchanged | New sections will not match the old ones | Uniform, but everything is new |
| The void underneath | Filled completely | Filled only if the base is properly compacted | Filled only if the base is properly compacted |
| Disruption | Dime-sized holes, patched | Demolition and hauling on part of the drive | Demolition, hauling, no driveway access |
Replacing a single section is usually the weakest of the three. It costs more than lifting, it still takes a week before you can park on it, and it leaves you with one bright new panel in the middle of a driveway that has been weathering for fifteen years. That mismatch does not fade -- new concrete and old concrete age differently and never converge.
What the Sectional Lift Looks Like
The process is short and there is almost nothing to clean up afterward.
- The settled sections are identified and marked, and the ones sitting at correct grade are left alone.
- Small ports are drilled through the settled sections only, each about the size of a dime.
- High-density polyurethane foam is injected. It expands beneath the concrete, fills the void first, then begins to lift.
- The lift is monitored in real time with a level, adjusted port by port until the section sits flush with its neighbors and drains away from the house.
- The ports are patched with cement grout and the joints between sections are sealed.
There is no excavation, no heavy equipment tearing across your lawn, and no curing period. You can park on it that afternoon.
What to Fix So the Neighboring Sections Do Not Follow
Lifting the settled sections solves what already happened. Redirecting the water is what keeps the next section from doing the same thing.
Move the downspout discharge. If a downspout empties within a few feet of the driveway, it is pouring water into the soil beneath the edge of the slab. An extension carrying it six to ten feet away removes the single largest source of erosion.
Seal the joints. The control joints between sections, and the joint where the driveway meets the garage, should be sealed with a flexible caulk. Open joints are funnels pointed directly at the soil supporting your concrete.
If the settlement is concentrated where the driveway meets the garage, that is a specific and very common pattern with its own cause, covered in why your driveway sinks right where it meets the garage.
Frequently Asked Questions
How do I know how many sections actually need to be lifted?
Lay a straight board or a level across the joints and look for the gap. Sections sitting more than about a quarter inch below their neighbors are candidates. You do not have to figure this out yourself -- send a photo taken from ground level looking down the length of the driveway, and the low sections are usually obvious.
Will the lifted section match the height of the others exactly?
That is the goal, and it is what the leveling process during injection is for. The section is raised until it sits flush with the sections around it and drains correctly. Slight variation at the joint line is normal on concrete that has been in the ground for years, but the trip hazard and the visible step are gone.
My driveway has cracks in several sections. Does that rule out lifting?
Usually not. Cracks are common on any driveway more than a decade old and most are cosmetic rather than structural. What matters is whether a section is still one solid piece. A cracked but intact panel lifts fine and the crack gets sealed afterward.
If I lift three sections now, will I end up lifting the rest later?
Not if the water is dealt with. The sections that have not moved are sitting on soil that has held for as long as your driveway has been there. What changes that is water finding a new path underneath, which is why redirecting downspouts and sealing joints is part of doing the job right.
Can you lift a driveway that has an asphalt patch or an added concrete apron?
Concrete sections can be lifted regardless of what has been patched around them. Asphalt behaves differently -- it flexes and sags rather than dropping as a slab, so it is not lifted the same way. If your driveway is a mix, we will tell you which parts are candidates and which are not.
How long does a sectional lift last?
The polyurethane foam does not absorb water, compress, or wash away, so the material is not the limiting factor. What determines the lifespan is whether the water that caused the settlement has been redirected. With drainage corrected and joints sealed, a properly lifted section holds for many years.
If sections of your driveway have dropped and you have been told the whole thing needs to come out, it is worth a second opinion. Benchmark Concrete Raising lifts settled sections back to grade in about two hours using polyurethane foam, and you can drive on it the same day. We work throughout the Minneapolis metro, including Edina, Plymouth, St. Louis Park, Bloomington, Minnetonka, Eden Prairie, and Maple Grove. Send us a photo of your driveway and we will give you an honest assessment and a ballpark number before we ever show up.
