French Drain Installation
Perforated pipe buried in gravel intercepts groundwater before it reaches your foundation and routes it to a safe discharge point. Invisible after installation. Works continuously without maintenance.
What a French Drain Actually Does
A French drain is the most common lawn drainage system for yards with groundwater or chronic saturation problems. A trench is filled with washed gravel and a perforated pipe. Water in the surrounding soil naturally migrates toward the gravel — the path of least resistance — enters the pipe through small holes, and flows by gravity to a discharge point away from your home.
The system works passively. No pump, no power, no moving parts. As long as the outlet is lower than the inlet, water flows. In DFW clay soils, this is especially effective because dense clay pushes water laterally rather than letting it percolate — meaning a properly positioned French drain can intercept a large volume of water that would otherwise load up against your foundation.
The filter fabric wrapped around the gravel and pipe is critical. Without it, fine clay particles migrate into the gravel over time, filling the voids and choking the system. A well-built French drain with quality fabric lasts 30–40 years.
When You Need a French Drain
- Water seeping through foundation walls or floor
- Perpetually soggy lawn areas that never fully dry
- Groundwater rising after heavy rain events
- Low spots in the yard that stay saturated for days
- Erosion at the base of a slope on your property
- Downhill neighbor water draining onto your lot
How Installation Works
Five steps from assessment to working drainage.
Mark & Locate
We trace the water path, identify the inlet zone and outlet point, and mark utility lines before any digging starts.
Trench
A trench is cut at the right slope — typically 1% grade minimum — from the problem area to the discharge point.
Fabric & Gravel
Filter fabric lines the trench to prevent soil migration into the gravel over time. A gravel base is laid before the pipe goes in.
Pipe Installation
Perforated pipe is placed perforations-down, wrapped in fabric, and covered with more washed gravel.
Outlet & Backfill
The outlet connects to solid pipe terminating at a pop-up emitter, daylight outlet, or street curb — away from the foundation.
What Does French Drain Installation Cost in DFW?
Installed cost runs $25–$50 per linear foot for a standard residential system. A typical 60–80 foot run is $1,500–$4,000. Full residential systems with multiple runs average $2,676–$3,856.
What changes the price: depth of excavation, rock encountered during digging, distance to a legal outlet, whether sod or landscaping needs restoration, and how many separate runs are required. A simple single-run system on flat lawn is at the low end. A system with a 100-foot run, a rock section, and outlet piped under a driveway to the street is at the high end.
French Drain Questions
How deep should a French drain be in North Texas?
How long does a French drain last?
Does a French drain work in clay soil?
Where does the water go?
Will I see the French drain after installation?
How much does French drain installation cost in DFW?
Also On This Site
Surface Drains & Catch Basins
French drains handle groundwater. Catch basins handle surface pooling. Many DFW yards need both.
Learn more →Sprinkler Inspection
Soggy soil damages irrigation heads and shifts pipe over time. Pair a drainage fix with a system inspection.
Learn more →Foundation Watering
Drainage removes excess water. Foundation drip systems add it back when clay dries out. Both protect your slab.
Learn more →Check Your Drainage Risk in 2 Minutes
Not sure if you need a French drain? Our assessment uses real USDA soil data for your address to calculate your drainage risk score and recommend the right solution.
Take the Free AssessmentNot Sure If a French Drain Is What You Need?
A drainage assessment figures out exactly where your water is coming from and what type of system fits your yard. We'll walk you through the options and the realistic costs before anyone digs anything.
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