South St. Louis County

Mudjacking & Concrete Leveling in Fenton, MO

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

Fenton was founded in 1818 on the west bank of the Meramec River, and its lower ground sits on silt and sand the river left behind. When high water soaks that soil and then drains away, slabs lose their footing. We raise sunken driveways, steps, patios and floors back toward level with mudjacking.

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 Fenton

In Fenton, the river valley, an older town center and a busy industrial side each bring their own kind of settling.

Patio slab settled away from a brick wall

Patios on low ground near the river

Back patios on the lower streets sit over silt the Meramec left behind. After a wet spring or a high-water event, that silt softens and shifts, and the slab ends up tilted toward the house or holding puddles.

Warehouse floors in the industrial area

Fenton has long been a place people work as well as live. The Chrysler plant on North Highway Drive opened in 1959, and the city's own newsletter has covered slab and sidewalk replacement in its industrial area. Floor joints that drop make a bump for every forklift and pallet jack.

Front entry steps and stoop pulling away from a brick home

Stoops on older homes around Olde Towne

Concrete stoops poured against older foundations tend to sink and lean away from the door. A gap opens at the threshold, rain gets behind the step, and it keeps dropping.

Concrete driveway slab sunken below the edge of a garage door

Driveways with a lip at the garage

The first driveway panel often rests on soil that was backfilled around the foundation. As that fill settles, the panel slides down and leaves a ledge you feel every time you pull in.

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 Fenton Property Owners Call Us

We're part of Nick Gress Foundations and take jobs on both sides of the Meramec, across St. Louis and St. Charles counties. If a slab is too far gone to lift, we'll say so before you spend a dime.

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 Fenton

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 Fenton

The Missouri Geological Survey's map of the Kirkwood quadrangle, which includes Fenton, shows river deposits along the Meramec that run from under 10 feet thick at the valley edges to more than 100 feet where the river cut down into bedrock. The top 15 feet or so is mostly silt, and the water table sits roughly 10 to 30 feet down over a layer of saturated sand and gravel more than 50 feet thick. The same map notes that low spots on the old river terraces later filled in with organic clay.

The U.S. Geological Survey runs a streamgage on the Meramec at Fenton and has published flood maps for the town, built partly from high-water marks left by the flood of December 2015 into January 2016. Every time water rises into silt like this and then drains back out, it can carry fine soil with it. Organic clay also squeezes down under weight over the years.

Mudjacking pumps a cement-based grout through small holes in the slab to fill the hollow underneath and lift the concrete. Once it's back in place, sending downspout water away from the edges gives the repair a better chance to last.

Sources: Missouri Geological Survey, Surficial Material Geologic Map of the Kirkwood 7.5' Quadrangle; USGS, Flood-Inundation Maps for the Meramec River at Valley Park and at Fenton, Missouri, 2017; City of Fenton News and Views, February and March 2025

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 Fenton 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!!!!

Fenton Mudjacking FAQ

Who fixes the sidewalk in front of my Fenton home?

The City of Fenton budgets for public sidewalks. Its early 2025 newsletter says the city will keep spending over $1 million each year on street and sidewalk replacement around town. For a public sidewalk, call Fenton Public Works at (636) 349-8155. Your driveway, walks, steps and patio are yours to keep up, and that's where we can help.

Why does concrete settle in the Meramec valley?

The low ground in Fenton is river silt over sand and gravel, with a water table that rises and falls. When water moves through that silt it softens it and can wash fine soil away, so a slab that was flat can settle into the space left behind.

Can you lift a slab that sank after high water?

Often, yes, once the ground has had time to drain. If the concrete is still in one piece, we fill the hollow under it and bring it back up. If the slab cracked into a lot of small pieces, we'll tell you replacement is the better choice.

Do you work on industrial and commercial property in Fenton?

Yes. We lift entry walks, sidewalks, parking slabs and warehouse floor sections. Tell us your hours and we'll plan the work so your business can keep running.

Do you serve the areas around Fenton?

Yes. We work in Valley Park, Kirkwood, Ballwin, Eureka and across St. Louis and St. Charles counties.

How do I get an estimate in Fenton?

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 Fenton:

See every area we serve

Ready to Fix Sunken Concrete in Fenton?

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