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We build concrete retaining walls across St Louis, MO to control slopes, manage erosion, and create level yard space. Our team designs walls with proper drainage, reinforcement, and footings so they remain stable over time. Choose plain, textured, or faced finishes to match your landscaping and improve your outdoor space.
St. Louis Concreters provides professional concrete retaining wall throughout St Louis, MO, Missouri and the surrounding area. Our licensed, insured crew delivers safe, clean, on-time work with a free estimate before anything begins. Call (314) 207-8572 or request your free quote.
Concrete Retaining Walls Built for St. Louis Hillsides and Soils
A concrete retaining wall has a simple job: hold soil in place so your yard, driveway, or building stays stable and dry. In St. Louis, that job is harder than it looks. Our clay-heavy soils expand and shrink with moisture, older neighborhoods like South City and Dogtown have tight lots and aging foundations, and many homes sit on sloped ground above alleys or neighboring yards. St. Louis Concreters designs each concrete retaining wall around those local conditions instead of using a one-size-fits-all layout.
We typically start with a site visit where we check slope, drainage paths, nearby structures, and how close utilities are to the work area. We look for signs of movement like cracked patios, leaning fences, washed-out mulch beds, or gaps between soil and foundations. From there we decide if you need a simple gravity wall for a shorter slope, a thicker steel-reinforced wall for taller grades, or a stepped layout that breaks up height and makes it easier to handle water.
For most residential projects we use cast-in-place concrete with rebar, either as a straight wall, a curved wall along a driveway or garden, or a terraced system with planting beds. On steeper hillsides or where there is a structure above, such as a garage or porch, we will treat the wall more like a structural element, size the footing and reinforcement more conservatively, and sometimes recommend an engineer’s review. The goal is a retaining wall that works quietly in the background for decades rather than a decorative piece that starts leaning after a few freeze-thaw cycles.
How We Build a Reliable Concrete Retaining Wall
Once we agree on a layout and height, St. Louis Concreters lays out the wall footprint and marks utilities. On many St. Louis city lots utilities are shallow and come in at odd angles, especially behind older brick homes, so we coordinate locates and adjust footing depth as needed. We then excavate for the footing, usually below frost depth, and cut the slope back to a stable angle so we are not building on loose fill.
We install a compacted gravel base under the footing to reduce settlement, then set up formwork for the footing and wall. Inside the forms we place rebar in a grid pattern tied on site. Taller walls get vertical bars that hook into the footing and horizontal bars that control cracking. Corners, steps, and any transitions in height receive extra reinforcement because that is where movement tends to show first.
Drainage is built into the wall from the start. Behind the wall we place a layer of clean washed rock and a perforated drain pipe (French drain) at the base that carries water to daylight or a safe outlet. We wrap the backfill stone with filter fabric so St. Louis clay does not clog the voids and build hydrostatic pressure. Weep holes or sleeves may be added in the face of taller walls to relieve any remaining water.
We then pour the concrete in one or more lifts, consolidating it to remove air pockets and achieve a dense, solid wall. After the initial set we strip forms at the right time to avoid surface damage and begin curing. Proper curing, usually by keeping the wall damp or using curing compounds, is especially important here because hot Missouri summers and sudden temperature swings can cause surface cracks if concrete dries too quickly.
Design Options, Finishes, and Integrating With Your Yard
A concrete retaining wall does not have to look like a bare gray slab. St. Louis Concreters can form and finish your wall so it fits the style of your home, whether it is a brick bungalow in Tower Grove, a mid-century ranch in Crestwood, or a newer build in St. Charles County. We offer smooth troweled finishes for a clean modern look, light broom textures for more grip near walkways, or exposed aggregate surfaces that better match older concrete drives and sidewalks.
We can also use form liners to create the look of stone or board-formed concrete, then stain or color-wash the surface to tie in with existing brick or siding colors. For front-yard walls in neighborhoods with visible street frontage, we often add a cast-in cap with a slight slope to shed water and create a finished edge. On backyard terraces, caps wide enough to sit on can double as casual seating.
Functionally, we pay attention to how the wall connects to your existing yard. Steps can be cast as part of the retaining wall to move between levels, and handrail pockets can be built in where code requires a rail. For driveways and parking pads, we tie wall design into concrete flatwork so expansion joints, control joints, and drainage lines are laid out in one coordinated plan rather than patched together over time.
Planting pockets, built-in planters, and lighting conduits can be included during the pour. This avoids later drilling or cutting into the wall, which can weaken reinforcement if done incorrectly. If you want fencing or privacy screening on top of the wall, we can embed post sleeves or base plates in the concrete so the wall and fence act as one solid system instead of separate pieces that move differently.
Cost Drivers, Timing, and Common Retaining Wall Problems We Fix
The cost of a concrete retaining wall in the St. Louis area is driven by height, length, access, and drainage requirements more than anything else. A low backyard garden wall with easy equipment access will be on the lower end, while a taller wall holding back a driveway or supporting a garage slab will require deeper footings, more rebar, and more engineering, which increases price. Tight city lots where everything must be dug and hauled by hand, or where we cannot get a skid steer into the yard, also add labor cost.
Soil conditions matter as well. Many neighborhoods sit on fill that was placed decades ago without compaction standards. If we dig and find soft pockets or old buried debris like bricks and cinders, we may need to over-excavate and bring in compacted base rock to create a reliable foundation. Slopes that already show signs of slipping or saturated ground near downspout outlets can add the need for additional drainage work.
St. Louis Concreters is often called in to replace failing railroad tie or timber walls that have rotted out, as well as block walls that were installed without proper drainage. Typical signs of trouble are bowing, leaning, stair-step cracking, bulges at the base, or soil washing out through joints. When we replace these, we usually remove the failed wall, cut the slope back further, rebuild the subgrade, and design a new reinforced concrete retaining wall that integrates a real drainage system instead of surface patchwork.
In terms of timing, most residential retaining wall projects take a few days to a week of site work, not counting curing time before heavy loads are placed behind or above the wall. We schedule pours around weather, especially in late winter and early spring when freeze-thaw cycles are strongest. If winter work is necessary, we use cold-weather practices like insulated blankets and adjusted mix designs so you do not end up with a weak or flaky surface.
What St. Louis Homeowners Should Check Before Hiring for a Concrete Retaining Wall
Before you hire any contractor for a concrete retaining wall, it helps to know what to ask. First, find out how they handle drainage. If the plan does not mention a drain tile behind the wall, clean rock backfill, and a clear discharge point, that is a red flag. Given our heavy spring storms and clay soils in St. Louis, drainage is not optional. It is the main thing that keeps a solid wall from becoming a leaning wall.
Next, ask about reinforcement and footing depth. For anything but the shortest decorative wall, rebar should be part of the discussion. The contractor should describe footing width, depth relative to frost line, and how the wall will be keyed into the footing so it acts as a single unit. St. Louis Concreters walks homeowners through this in plain language so you know what you are paying for behind the concrete you can see.
Permits and property lines are another concern. City of St. Louis and many surrounding municipalities require permits or engineered drawings once a retaining wall passes a certain height, especially if it is near a sidewalk, alley, or neighbor’s property. We help you determine whether a permit or engineer is needed and can work from engineered plans if your project calls for it. We also encourage customers to confirm property boundaries before building close to a line to avoid disputes later.
Finally, consider how the wall will tie into the rest of your property over time. Ask about expected lifespan, maintenance, and what might be needed years down the road, such as sealing, minor crack repair, or regrading nearby soil. A good concrete retaining wall should not be a recurring headache. With proper design, construction, and drainage, it should quietly handle St. Louis weather and soil movement with only minimal attention.
