Lynnwood · Snohomish County
Grading & Drainage in Lynnwood, WA
Grading, French drains, retaining walls and RV and equipment pads across Lynnwood, from Alderwood to Meadowdale. Built so water moves away from the house instead of toward it.
Why drainage matters on Lynnwood properties
Glacial till over most of the city, hard digging with a perched water table in the wet months. Pockets of peat and soft organics show up around Scriber Lake and the creek bottoms. That is the root of most wet-yard, wet-crawlspace and failing-patio problems we see. Water that cannot soak in runs along the surface or perches on the hard layer until it finds the lowest point.
Rolling upland between I-5 and Puget Sound, sloping west toward Meadowdale where the ground breaks into steep ravines above the Sound. Slopes push water downhill onto the next lot, and flat ground leaves it nowhere to go. Getting the grade right is cheaper than fixing what water does to a foundation.
Scriber Creek and Scriber Lake run through the middle of town, and Lund's Gulch and the Meadowdale ravines carry steep-slope and stream buffers on the west side. Where drainage can legally discharge depends on these features, so we plan the outlet first and the trench second.
Common grading projects in Lynnwood
Wet yards and crawlspaces
Regrading and French or curtain drains for Lynnwood yards that stay soggy all winter because water perches on the hard till below.
Retaining walls on slopes
Block and rock retaining walls that hold back sloped Lynnwood yards and driveways, built with drainage behind them so they last.
Grading away from the foundation
Reshaping the ground around Lynnwood homes in City Center and Alderwood so it falls away from the house, the cheapest fix for water at the foundation.
Ditches and culverts
Cleaning and regrading drainage ditches, and setting culverts under driveways, on the low, wet ground around Lynnwood.
Downspout tightlines
Connecting downspouts to solid pipe that carries roof water to an approved outlet instead of dumping it next to a Lynnwood foundation.
What our grading work in Lynnwood covers
- Retaining Walls
- French Drains & Footing Drains
- Rough & Finish Grading
- RV & Equipment Pads
- Yard Drainage Correction
- Erosion Control
Permits & Rules
Grading and retaining wall permits in Lynnwood
Inside city limits, the City of Lynnwood handles grading permits; outside them, Snohomish County Planning and Development Services (PDS). Small regrading and yard drains usually do not need one, but larger volumes of cut or fill, work in a critical area, or changes to how water leaves the property often do.
Retaining walls taller than about four feet, or walls holding back a driveway or slope, typically need engineering and a permit. We build to the approved plan and can tell you on the site walk when a wall is likely to need one.
Cost & Timing
What affects the cost of grading in Lynnwood
We do not publish flat prices because no two Lynnwood sites are the same. These are the things that move the number most here.
Slope and access
Steep Lynnwood lots take smaller machines, more careful staging and sometimes engineering, which adds time compared with flat, open ground.
Soft ground
Where Lynnwood 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 Lynnwood'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 Lynnwood jobs.
When to schedule grading in Lynnwood
Grading in Lynnwood 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.
Lynnwood'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
Grading and drainage across Lynnwood
Lynnwood is one of the fastest-changing cities in south Snohomish County. The City Center around the light rail station is filling with new buildings, while the neighborhoods around it are mostly established single-family lots that are getting remodeled, added onto and infilled.
We regrade yards, install French drains and curtain drains, build block and rock retaining walls, and set gravel RV and equipment pads across City Center, Alderwood, Meadowdale, Scriber Lake, Lynndale and North Lynnwood.
Mostly 1960s and 70s ramblers and split-levels on quarter-acre lots, with a steady stream of teardowns, ADUs and townhome infill as the area densifies. Older lots often have no real drainage at all, while newer ones sometimes have drains that were never connected. We find out which before we dig.
We also do grading nearby in Mountlake Terrace, Brier, Edmonds and Lake Forest Park. See everything we do in Lynnwood, read our full guide to grading, or browse all service areas.
Why DirtRaptor
Why Lynnwood owners call us for grading
Owner on the machine
On Lynnwood 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 Lynnwood 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 I-405, not a subcontractor's.
Built for slopes
We plan machine placement, drainage and erosion control for Lynnwood's sloped ground before we start.
How a grading job runs
- 01
Site Assessment & Water Tracing
- 02
Design & Elevations
- 03
Excavation & Base Preparation
- 04
Build, Drainage & Backfill
Real Jobs
Recent DirtRaptor work near Lynnwood
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
Grading & Drainage in Lynnwood: FAQs
Why does water collect around homes in Lynnwood?
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Glacial till over most of the city, hard digging with a perched water table in the wet months. Pockets of peat and soft organics show up around Scriber Lake and the creek bottoms. When water cannot soak in, it follows the surface toward the house. Regrading so the ground falls away from the foundation, plus a drain where needed, usually solves it.
Do retaining walls need a permit in Lynnwood?
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Walls over about four feet, or walls supporting a driveway, building or slope, usually need engineering and a permit from the City of Lynnwood (or Snohomish County Planning and Development Services (PDS) outside city limits). Shorter landscape walls often do not. We confirm before building.
Where can drainage water go on my Lynnwood property?
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It has to go somewhere approved: an existing storm system, a dispersion area or an infiltration trench where the soil allows. Scriber Creek and Scriber Lake run through the middle of town, and Lund's Gulch and the Meadowdale ravines carry steep-slope and stream buffers on the west side. We plan the outlet before we trench.
How much does grading cost in Lynnwood?
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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 Lynnwood are usually slope and access, soft ground, buffers and permits. You get a written number with inclusions and exclusions spelled out.
When is the best time to schedule grading in Lynnwood?
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Grading in Lynnwood 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.
I'm adding an ADU in Lynnwood. Can you handle the site work?
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Yes. ADU jobs usually need a small footprint excavated, a utility trench back to the house, and a few trees or a slab out of the way first. We do all of that on one mobilisation and haul the spoil on our own trucks.
Why does my Lynnwood yard stay soggy all winter?
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Lynnwood sits on glacial till, which lets almost nothing soak in. Water perches on top of it and runs to the lowest spot, often your crawlspace or patio. Regrading and a properly placed French drain usually fix it.
How long does a retaining wall take to build?
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A short accessible garden wall can be a couple of days. A taller engineered wall with drainage, geogrid and difficult access runs considerably longer. Base preparation takes more time than most people expect, and it is not the part to rush.
Ready for a real number in Lynnwood?
Send the address and a few photos. We walk the site for free and come back with a written quote.
