French Drain Installation for Kansas City Homes
KC clay holds water against your foundation. We install engineered French drains and underground downspout extensions that move water far enough away to actually keep your basement dry.
NDS Certified Professional Drainage Contractor. Verified training in drainage design, products, and installation — engineered for Kansas City clay. Verify →
If your basement gets wet during heavy rain, water pools in the yard 24+ hours after a storm, or you can see water staining at the foundation — you have a drainage problem, not a foundation problem (usually). Underground extensions: $600–$1,400. French drains: $1,500–$5,500. Free in-person diagnosis.
Why Kansas City homes need drainage more than most
Kansas City sits on heavy clay soil — "Kansas City Group" shales and the alluvial clays of the Missouri and Kansas river basins. Clay holds water instead of letting it drain. Combine that with KC's flash-flood summer storms (3–4 inches per hour) and freeze-thaw winters, and any water that hits your foundation stays there until it finds a crack to push through.
⚠ Wet basement after rain
Water seeping through foundation walls or floor cracks after every heavy storm. Often 24-72 hrs after, because clay drains slowly.
⚠ Yard pools that don't drain
Standing water in the same low spot in your yard for days after rain. Lawn turns to mud. Mosquitoes breed.
⚠ Downspout splash erosion
Mulch washing out, dirt eroded down to the foundation, water marks on siding 12 inches up from the ground.
⚠ Foundation cracks with stains
Horizontal or vertical cracks in basement walls with rust-colored or white mineral staining = water has been moving through.
⚠ Musty basement smell
Constant humidity from slow seepage you can't see, growing mold behind drywall and inside boxes.
⚠ Heaved sidewalks or patios
Concrete pushed up by frozen saturated clay (frost heave). The clay only stays saturated if drainage is failing.
Three drainage fixes that actually work in KC
We don't just bury one corrugated black pipe and call it good. We diagnose the source, pick the right system, and engineer the outlet so water actually leaves your property.
✅ Underground downspout extensions
The most common KC fix. If your downspouts dump at the foundation, we bury Schedule 40 PVC or corrugated pipe underground and route the gutter discharge 8–20 ft away from the house to a daylight outlet.
- Solves 70% of "wet basement during rain" calls without touching the foundation
- Your choice of Schedule 40 PVC or corrugated pipe based on budget and conditions
- Pop-up emitter opens under flow pressure, closes when dry — mower-safe
- Tied directly to your existing downspout outlets — no surface plumbing visible
✅ French drains (perimeter or surface)
For the yard pools and the saturated soil problems. A French drain is perforated pipe in a gravel-filled trench, wrapped in filter fabric. Surface water and shallow groundwater flow into the gravel, into the perforated pipe, and out to your engineered discharge point.
- 4″ virgin HDPE perforated pipe (not the cheap corrugated black stuff)
- Woven filter fabric wrap to keep soil out of the gravel
- Clean 3/4″ washed rock around the pipe
- 1″ drop per 8 ft minimum slope
- Foundation perimeter or surface yard drain depending on your problem
What we use vs. what the landscape company uses
Most "drainage" jobs in KC are done by landscape companies with a trencher and whatever pipe was on the truck. Here's why that fails and what we do instead:
| Component | Landscape spec | Premier spec |
|---|---|---|
| Drainage pipe | One-size-fits-all approach | Schedule 40 PVC or corrugated (we recommend based on your conditions) |
| Perforated French drain pipe | Corrugated black perforated | Virgin HDPE 4″ 8-slotted |
| Filter fabric | None or non-woven (clogs) | Woven geo-textile filter fabric |
| Trench rock | River pebble or no rock | 3/4″ clean washed rock |
| Slope | "Eyeballed" downhill | 1″ per 8 ft min, laser-shot grade |
| Outlet | Daylighted to neighbor's yard | Daylight to your low point, properly graded |
| Lifespan | 5–10 years before clog | 25–40 years |
Our drainage install process
Most KC drainage jobs are done in 1–3 days. Bigger perimeter-drain scopes can run 3–5 days.
On-site water walk (free, ~45 min)
We walk the property and look at exactly where water goes during rain. Often we'll ask you to describe what happens during a storm. We check grade, downspout positions, and where water actually exits the property.
Written drainage design
You get a written quote line-itemed by drain length, pipe type, outlet type, and labor. Quote holds for 30 days.
Utility locate (we pull MO 811)
Free state utility locate. We never trench without this. Takes 2–3 business days from request.
Trench & install
Trenched with a mini-excavator or trencher depending on access. We hand-dig the last 2 ft to any marked utility. Pipe set with laser-checked slope. Fabric, rock, and pipe layered correctly.
Water test & backfill
We run water from your hose down each downspout and through the French drain, confirm flow at the outlet, then backfill, restore grade, reseed disturbed sod with KC fescue or rye blend.
10-year workmanship warranty
Pipe and rock carry industry-standard material warranties. Our installation labor is warranted 10 years — if it clogs, sags, or fails from our install, we re-do it free.
What KC drainage actually costs
Honest ranges based on real 2026 KC market pricing. Final price depends on length, depth, access, and outlet design. Free in-person walk for the exact number.
| Service | Typical KC range | What's included |
|---|---|---|
| Single downspout extension | $300 – $700 | Schedule 40 PVC or corrugated, 15–25 ft from house, daylight outlet |
| Whole-house downspout system (5–7 downspouts) | $1,500 – $3,500 | Underground extensions for every downspout, engineered outlets |
| Yard French drain (40–80 ft) | $1,500 – $3,800 | HDPE perforated, fabric, washed rock, daylight outlet |
| Foundation perimeter French drain | $4,000 – $10,000+ | Around the foundation perimeter, tied to discharge, restored grade |
| Dry well install (10–20 cu ft) | $800 – $2,200 | Sized for your roof area, gravel-filled or chamber type |
| Sump pump replacement (cast iron) | $1,500 – $2,800 | Replace failed pump with cast-iron, add battery backup option |
| Pop-up emitter (add-on) | $150 – $300 | Per emitter, includes adapter and clean-out access |
KC neighborhoods we drain regularly
All these areas sit on heavy clay or have known drainage issues from grading + tight infill lots:
French Drain Questions
Do I need a French drain in Kansas City?
How much does a French drain cost in Kansas City?
What's the difference between a French drain and a downspout extension?
How long does a French drain last?
Can I install a French drain myself?
Where does the French drain water go?
Will a French drain solve my wet basement?
Will trenching damage my yard?
Does insurance cover French drain installation?
Stop the basement water for good.
Free in-person drainage walk. We diagnose where the water is actually coming from, design a fix, and give you a written line-item quote — usually within 24–72 hours of your call.
Book my drainage walk → Call (816) 469-9563Browse French Drains & Drainage by City
We serve all 66 cities across the KC metro. Click your city for french drains & drainage pricing, examples, and a free quote tailored to your area.