Foundation Repair & Waterproofing in Johnson County, KS

Last updated March 2026

Cities We Serve in Johnson County

We work all over Johnson County — every city, every unincorporated pocket. Pick your city below to see the typical foundation and waterproofing issues we fix there day in and day out.

Also serving: Merriam, Mission, Roeland Park, Fairway, Westwood, Mission Hills, De Soto, Gardner, Spring Hill, Stilwell, and Lake Quivira.

What JoCo Soil Does to Foundations

If you have ever tried to dig a hole or plant a tree in Johnson County, you already know the clay. Dense, gray, and sticky when it is wet, then hard as concrete when it dries out. It swells when it takes on water and shrinks when it gives that water back. That constant expansion–contraction cycle is rough on concrete and block.

The northern tier of JoCo — Prairie Village, Mission, Merriam — has some of the oldest homes in the county, many built in the late 1940s and 1950s with cinder block foundations. Those block walls did fine for a few decades, but 70+ years of Kansas City clay pushing on them has bowed a lot of basements inward. We are installing wall anchors and carbon fiber straps in these neighborhoods all the time to stop that movement and straighten walls where possible.

Central JoCo — Overland Park, Lenexa, most of Shawnee — really took off in the ’70s through the ’90s. Poured concrete foundations are more common here and are generally stronger than block, but they still move. During a hot, dry Kansas summer the clay shrinks away from the footing, a void opens up, and one corner or one side of the house drops. That is where push piers come in to transfer the load down to stable soil or bedrock.

Southern JoCo — south Olathe, Gardner, Spring Hill — is mostly newer construction, and we are already seeing problems on homes that are only 5–10 years old. Farmland gets turned into subdivisions, grading is rushed, fill is not compacted the way it should be, and the house goes up on top of it. A few seasons of wet and dry and the structure starts to shift. Helical piers are common in this part of the county, especially under additions, bump‑outs, and garage slabs.

Basement Waterproofing Across JoCo

Wet basements are almost a given in Johnson County if the drainage around the home is not handled correctly. The clay holds moisture right up against your foundation walls and builds hydrostatic pressure. Water then looks for the weak spots — hairline cracks, cold joints, porous block — and shows up as seepage, damp spots, and sometimes standing water. After a strong spring thunderstorm, it is common to see water seeping in at the wall‑floor joint in Prairie Village, Mission, and similar areas.

Our interior french drain systems are set up specifically for these JoCo conditions. We collect the water along the footing before it reaches the middle of the floor and send it to a sump pump that discharges it safely away from the house. Combine that with crack injection on any leaking wall cracks and you have a basement that stays dry when the forecast does not.

Services We Provide