Mountlake Terrace · Snohomish County
French Drain Installation in Mountlake Terrace, WA
French drains, curtain drains and downspout tightlines in Mountlake Terrace that collect water before it reaches the house and carry it to an approved outlet. Serving Town Center, Lake Ballinger, Terrace Creek and Melody Hill.
Why Mountlake Terrace yards hold water
Glacial till with a seasonal perched water table. The Lake Ballinger and Hall Creek lowlands carry softer, wetter soils. That is the root of most soggy lawns, wet crawlspaces and ponding patios we see in Mountlake Terrace: water that cannot soak in perches on the hard layer and runs to the lowest point.
Mostly flat to gently rolling upland, dropping into the Hall Creek and Terrace Creek ravines and down to Lake Ballinger on the north end. Slopes push water onto the next lot down, and flat ground leaves it nowhere to go, so the drain route and the grade around the house matter as much as the pipe.
Lake Ballinger, Hall Creek and Terrace Creek all carry shoreline or stream buffers, and Terrace Creek Park is a protected wooded ravine. Where a drain can legally discharge depends on these features, so we plan the outlet first and the trench second.
Common french drains projects in Mountlake Terrace
Soggy lawns
French drains for Mountlake Terrace lawns that stay wet all winter because water perches on the hard till below.
Wet crawlspaces
Curtain and footing-side drains that keep water away from foundations and crawlspaces in Town Center and Lake Ballinger.
Downspout tightlines
Roof water carried in solid pipe away from Mountlake Terrace foundations to an approved outlet.
Hillside water control
Curtain drains across Mountlake Terrace slopes that stop water before it sheets over a bank or onto the next lot.
Flat-ground drainage
Drains, catch basins and ditch work for flat, low Mountlake Terrace properties where water has nowhere to go.
What our french drains work in Mountlake Terrace covers
- French Drains
- Curtain Drains
- Downspout Tightlines
- Catch Basins
- Yard Regrading
- Material Delivery
Permits & Rules
Drainage rules in Mountlake Terrace
Small yard drains usually do not need a permit, but connecting to a storm system, working near a stream or wetland, or changing how water leaves the property can need approval from the City of Mountlake Terrace. Outside city limits, Snohomish County Planning and Development Services (PDS) handles it.
Water can go to an existing storm system, a dispersion area or an infiltration trench where the soil allows. It cannot be pointed at a neighbor or dumped over a slope.
Cost & Timing
What affects the cost of french drains in Mountlake Terrace
We do not publish flat prices because no two Mountlake Terrace sites are the same. These are the things that move the number most here.
Slope and access
Steep Mountlake Terrace lots take smaller machines, more careful staging and sometimes engineering, which adds time compared with flat, open ground.
Tight lots
Narrow side yards and alley access in Mountlake Terrace mean compact equipment and shorter truck loads. We plan it so it costs less than it could.
Soft ground
Where Mountlake Terrace soils are soft or wet, over-excavation, fabric and imported rock are often part of the job, and we price that in up front.
Buffers and permits
Work near Mountlake Terrace's rivers, creeks, lakes or shoreline can need permits and limits on where machines go. That affects scope and schedule more than price.
Haul-off and disposal
How much material leaves the site, and what it is, drives cost. Our own trucks keep that predictable on Mountlake Terrace jobs.
When to schedule french drains in Mountlake Terrace
French Drains in Mountlake Terrace goes best in the drier months, when soil compacts properly and trenches stay open. Wet-season work is doable with erosion control and the right material, and we plan for it in the quote.
Mountlake Terrace's till soils hold water through the winter, which is when drainage problems show up. That is a good time to see where water goes, and the dry season is the time to fix it.
Where We Work
Drainage work across Mountlake Terrace
Mountlake Terrace was built out quickly in the decades after World War II, and much of the housing stock is from that era. Now the light rail station and Town Center are bringing new density, while older homes are being remodeled or replaced.
We install French and curtain drains, catch basins and downspout tightlines across Town Center, Lake Ballinger, Terrace Creek, Melody Hill and Cedar Terrace. Mostly 1950s and 60s ramblers on modest lots, many with original sheds, carports and failing concrete, plus new apartments and townhomes near the station.
Drain rock, fabric and pipe are delivered on our own trucks, and the excavated soil is reused for regrading or hauled away.
We also do french drains nearby in Brier, Lake Forest Park, Shoreline and Lynnwood. See everything we do in Mountlake Terrace, read our full guide to french drains, or browse all service areas.
Why DirtRaptor
Why Mountlake Terrace owners call us for french drains
Owner on the machine
On Mountlake Terrace jobs you talk to the person who walks the site, writes the quote and runs the equipment.
Trees and dirt, one crew
If trees are in the way of your Mountlake Terrace project, we take them down ourselves instead of waiting on a separate tree service.
Our own trucks
Haul-off and deliveries run on our schedule along I-5 and 236th St SW, not a subcontractor's.
Built for slopes
We plan machine placement, drainage and erosion control for Mountlake Terrace's sloped ground before we start.
How a french drains job runs
- 01
Find the Water
- 02
Plan the Outlet
- 03
Trench, Fabric, Rock & Pipe
- 04
Backfill & Grade
Real Jobs
Recent DirtRaptor work near Mountlake Terrace
Demolition · Edmonds, WA
Driveway Removal & Concrete Prep
Tearing out an old blacktop driveway and prepping the ground for a new concrete pour — broken material hauled off, base left clean and ready.
Demolition · Everett, WA
Condemned 100-Year-Old Shed Teardown
A 100-year-old shed, condemned and unsafe, brought down and hauled off — the site left graded flat and clean.
Questions
French Drain Installation in Mountlake Terrace: FAQs
Will a French drain fix my wet yard in Mountlake Terrace?
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Often, especially combined with regrading. Glacial till with a seasonal perched water table. A drain plus better grading handles most of what that causes.
Where can drainage water go in Mountlake Terrace?
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To an approved outlet: a storm system, a dispersion area or an infiltration trench where the soil allows. Lake Ballinger, Hall Creek and Terrace Creek all carry shoreline or stream buffers, and Terrace Creek Park is a protected wooded ravine.
Do I need a permit for a French drain in Mountlake Terrace?
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Usually not for a small yard drain. Storm connections or work near streams, wetlands or slopes can need approval from the City of Mountlake Terrace. We confirm before digging.
How much does french drains cost in Mountlake Terrace?
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It depends on the site, so we quote after a free site walk rather than guessing on the phone. The biggest drivers in Mountlake Terrace are usually slope and access, tight lots, soft ground. You get a written number with inclusions and exclusions spelled out.
When is the best time to schedule french drains in Mountlake Terrace?
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French Drains in Mountlake Terrace goes best in the drier months, when soil compacts properly and trenches stay open. Wet-season work is doable with erosion control and the right material, and we plan for it in the quote.
Can you tear down an old carport or shed in Mountlake Terrace?
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Yes. Small outbuildings are a regular job. We take the structure and slab out, sort the debris, haul it on our own trucks and leave the ground graded. Older structures may need an asbestos survey first, which we walk you through.
Do you work near Lake Ballinger?
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Yes, with care. Work close to the lake or Hall Creek can fall inside a shoreline or stream buffer, so we confirm what is allowed before any clearing or grading starts.
Do I need a permit for a French drain?
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Small yard drains usually do not, but connecting to a storm system, working in a critical area or changing how water leaves the property can. We confirm with your city or county before we dig.
Ready for a real number in Mountlake Terrace?
Send the address and a few photos. We walk the site for free and come back with a written quote.
