St. Charles County

Mudjacking & Concrete Leveling in O'Fallon, MO

Name: St. Louis Mudjacking
Address: St. Louis, MO, 63101, US
Telephone: (636) 220-5199
Price range: $$

O'Fallon grew from about 18,700 people in 1990 to more than 91,000 in 2020, and most of its homes sit on lots that were graded and filled for new subdivisions. When that soil settles, driveways, walks and patios drop with it. We lift the slab you already have with mudjacking, usually in a few hours.

Call (636) 220-5199 Get a Free Estimate

Free, no-pressure estimates
A Nick Gress Foundations company
Open 7 days, 7am to 9pm

Reviewed by the St. Louis Mudjacking team · Updated October 29, 2026

How mudjacking lifts a sunken driveway, start to finish.

Concrete Problems We Fix Around O'Fallon

Most of what we see in O'Fallon comes from soil that was moved around when the neighborhoods were built, plus water from the creeks and downspouts that keeps working on it.

Concrete driveway slab sunken below the edge of a garage door

Driveways that drop at the garage

In subdivisions built from the late 1990s on, like WingHaven, Fieldstone Farms and Streets of Caledonia, the soil next to the foundation was backfilled. As it settles, the driveway panel at the garage sinks and leaves a lip at the door.

Front entry steps and stoop pulling away from a brick home

Walkways and steps pulling away from the house

Front walks and stoops poured over backfill tend to tip toward the house or step down where they meet the porch. That gap lets water in and makes a trip edge at the entry.

Patio slab settled away from a brick wall

Patios that hold water

Back patios on graded lots often sit on fill that was never packed well. Once they settle, rain pools on the slab or runs back toward the foundation instead of away from it.

Raised sidewalk edge creating a trip hazard

Sidewalk panels at the driveway

The city handles most public sidewalk repairs in O'Fallon, but the sections through or next to your driveway are the owner's job. A sunken panel there is one of the most common calls we get.

Before & After: What Mudjacking Fixes

These are the kinds of slabs we lift every week across St. Louis and St. Charles counties. The slab stays in place; we raise it and fill the empty space underneath.

Before and after mudjacking a sunken driveway slab that had dropped below the garage apron

Before and after leveling a sidewalk panel with a raised edge that was a trip hazard

Before and after lifting a sunken concrete walk at a storefront entrance

Empty void under a concrete slab before and after it was filled with mudjacking grout

Before and after leveling a settled joint in a commercial concrete walkway

See more project photos

Watch Mudjacking in Action

A quick look at how lifting works on real slabs. The grout goes in through small holes, fills the empty space underneath, and raises the concrete back toward level.

Leveling a sunken garage floor.

Leveling a settled walkway.

Why O'Fallon Property Owners Call Us

We're a St. Charles County company, part of Nick Gress Foundations, so O'Fallon jobs are close to home. We'll tell you straight if a slab can be lifted or if it's too far gone.

St. Louis Mudjacking technician pumping grout under a sunken driveway

Free, no-pressure estimates with a straight answer on whether lifting will work
Proven grout-based mudjacking that fills voids and lifts the slab you already have
Usually done in a few hours, without tearing out concrete
Small, patched holes and a cleaned-up work area when we leave
Residential and commercial work, from front steps to parking lots
Part of Nick Gress Foundations, a St. Charles-based family company

How Mudjacking Works

Small drilled holes in a settled concrete walkway before mudjacking

1. Drill small holes

We drill a few small holes through the settled slab to reach the empty or soft spots underneath.

Mudjacking nozzle pumping grout through a hole to lift a sunken concrete slab

2. Pump and lift

A cement-based grout is pumped under the slab. It fills the voids first, then slowly raises the concrete back toward level.

Patched mudjacking hole on a stamped concrete patio, shown next to a quarter for size

3. Patch and clean up

Once the slab is where it should be, we patch the holes and clean up. Most jobs are finished the same day.

Get a Free Mudjacking Estimate in O'Fallon

Tell us what is sinking and where. We will follow up to set up a free estimate. Prefer to talk? Call (636) 220-5199.

Why Concrete Sinks in O'Fallon

O'Fallon sits on the loess uplands north of the Missouri River. The Missouri Geological Survey's map of the O'Fallon area shows wind-blown silt (loess) up to about 70 feet thick, clayey glacial till 10 to 25 feet thick in the western part, and silty creek deposits up to about 130 feet thick along Dardenne Creek, where the water table is only 5 to 15 feet down. The same map shows man-made fill up to 40 feet deep where land was leveled.

Loess holds up well when it's dry and packed, but it compacts and washes out when water gets under it. The till clays to the west shrink and swell with moisture, which is why newer developments here often dig out and replace soil under foundations. Driveways and walks don't get that treatment, so they're the first thing to move.

Mudjacking fills the hollow that forms under the slab and lifts the concrete back toward level. Pairing it with longer downspout extensions keeps the water from carving out a new void.

Sources: Missouri Geological Survey, Surficial Material Geologic Map of the O'Fallon 7.5' Quadrangle; City of O'Fallon Streets Division

Tape measure showing a washed-out void under a concrete slab — A washed-out void under a slab. This is the space mudjacking fills.

Mudjacking crew mixing grout in the pump hopper beside a garage — Mixing the grout that goes under the slab.

Mudjacking Services for O'Fallon Homes and Businesses

Every service uses the same lifting process, sized to the slab. Not sure which one you need? Describe the problem on the estimate form and we will help you sort it out.

Driveway leveling for sunken slabs and lips at the garage
Sidewalk and walkway lifting to remove trip hazards
Steps and entry lifting for leaning or separated front steps
Porch lifting for settled concrete porches
Patio lifting for slabs that hold water or tilt toward the house
Garage floor lifting for low or cracked sections
Pool deck lifting for uneven decks around pools
Concrete slab lifting for AC pads, shed slabs and more
Void filling to restore support under concrete
Commercial concrete lifting for walks, entries, lots and warehouse floors

What St. Louis-Area Customers Say

Google reviews from customers across the St. Louis metro.

    
 
 
       Posted on Google  
   
   Jack Naudi 
 
 
 
 Trustindex verifies that the original source of the review is Google. Nick and his family turned my highly uneven, and very large, concrete driveway and pad into an almost perfectly level sheet. It was amazing to see. Nick and his family were awesome to work with, the price was fair, and the results were amazing. I highly recommend them.
  
 
      Posted on Google  
   
   Meddie Garreau 
 
 
 
 Trustindex verifies that the original source of the review is Google. Nick and his team were extremely punctual, hard working and completed the task on time. We had almost fifty feet of foundation cracks repaired as well as the driveway mudjacked. Would highly recommend for future work.
  
 
      Posted on Google  
   
   Steve Plant 
 
 
 
 Trustindex verifies that the original source of the review is Google. I wrote a bad review earlier about bad communication. His family was very ill that is why he was slow to get back to me. I ended up hiring them for a large driveway leveling job and it turned out great. Great quality and great pricing. I have referred St. Louis Mud Jacking multiple times since my project and I will continue to use them on my properties. I wish there was a way to remove my old review but I wasn't able to. Great company!!!!

O'Fallon Mudjacking FAQ

Who fixes the sidewalk in front of my O'Fallon home?

According to the City of O'Fallon, the city is generally responsible for repairing sidewalks along city right-of-way, with exceptions that include sidewalks through or next to driveways and private entrances. Driveways themselves are the owner's responsibility. You can report a public sidewalk problem to the city's Streets Division at 636-379-3807. For your driveway, walks, steps and patio, give us a call.

Why does concrete sink so much in newer O'Fallon subdivisions?

Much of O'Fallon was built on graded loess and fill. Backfill next to foundations and fill on leveled lots keeps settling for years, and water from roofs and slopes washes fine silt out from under slabs. The concrete stays in one piece, but the support underneath disappears.

Can you lift a driveway that has dropped at the garage?

Usually, yes. If the slab is still in one piece, we pump grout under it to fill the void and raise it back toward the garage floor, which takes out the lip at the door. Badly broken slabs may need replacement, and we'll tell you if that's the case.

How long before I can use my driveway again?

Most O'Fallon driveway and walkway jobs are done in a few hours. We'll let you know when it's ready for foot traffic and when to drive on it, based on the job.

Do you serve the areas around O'Fallon?

Yes. We work throughout St. Charles County, including St. Peters, Lake St. Louis, Cottleville and Wentzville, plus St. Louis County.

How do I get an estimate in O'Fallon?

Fill out the estimate form on this page or call (636) 220-5199. Estimates are free and there's no pressure.

Nearby Service Areas

We also lift and level concrete in these communities near O'Fallon:

See every area we serve

Ready to Fix Sunken Concrete in O'Fallon?

Uneven concrete does not fix itself. Call or send the form, and we will tell you plainly whether lifting is the right fix.

Call (636) 220-5199 Request an Estimate