French Drain Installation in Seattle & King County WA
Say goodbye to soggy lawns and standing water — get a French drain that actually works.
We install French drains that stop flooding, protect your home’s foundation, and keep your yard usable year-round.
What is a French Drain?
What Is a French Drain and Why Do You Need One?
A French drain is a gravel-filled trench with a perforated pipe that redirects groundwater away from your home or yard. It's one of the most effective ways to fix:
Pooling water near your home
Saturated soil or soggy lawns
Water damage around foundations or crawlspaces
Flooded basements
We work with homeowners, contractors, and developers across King County, WA — and we understand local codes, soil conditions, and rainfall challenges better than anyone.
What’s Included
What’s Included in Our French Drain Systems
Our team installs custom drainage systems designed for your specific yard and soil. Every French drain project includes:
Site inspection and drainage assessment
Grading and trenching
Perforated pipe and drainage fabric
Washed gravel backfill
Tie-ins to downspouts or drywells (if needed)
Yard cleanup and site restoration
We only use high-quality materials rated for Pacific Northwest conditions.
Why Homeowners Choose Sandbagger
Built Right. Built Once.
Local expertise in King County’s rainy weather and soil types
Honest assessments — no one-size-fits-all solutions
Woman-owned, RainWise-certified contractor
Washington State Certified Erosion & Sediment Control Lead
Hundreds of systems installed for homeowners like you
Where We Install French Drains
Serving Homeowners Across King County WA
We provide French drain installation for homes in:
Seattle
Burien
RENTON
KENT
DES MOINES
SHORELINE
TUKWILA
Bellevue
Federal Way
& surrounding areas
REVIEWS
Homeowner Testimonials
Kelly M., Seattle WA
They installed a French drain last fall, and this year we had zero standing water. Total game-changer.
Chris L., Kent WA
Professional, fast, and it works perfectly. We should’ve done this years ago.
FAQs
French Drain FAQs
How long does installation take?
Most French drains are installed in 1–2 days, depending on yard size and complexity.
Will my yard be torn up?
We trench only where needed and fully restore the area after installation — most clients say you’d never know we were there.
How much does it cost?
Costs vary depending on the yard, layout, and tie-ins. We provide free quotes and honest pricing.
Ready to Fix Your Drainage for Good?
Let’s walk your yard, check your problem spots, and give you a free quote for a system that works.