Kenmore · King County
Retaining Wall Contractor in Kenmore, WA
Block and rock retaining walls in Kenmore, built on a compacted base with drainage behind them, from garden walls to walls that turn a slope into usable yard. A narrow flat strip along the lake and river, with steep wooded slopes rising north and east into neighborhoods like Inglewood and Moorlands.
Building walls on Kenmore ground
A narrow flat strip along the lake and river, with steep wooded slopes rising north and east into neighborhoods like Inglewood and Moorlands. That is where retaining walls earn their place in Kenmore: leveling yards, widening driveways and holding back cut slopes for pads and patios.
Glacial till and outwash on the slopes, with soft, wet lake and river deposits along the shoreline. What is under the wall decides how much base prep it needs, and poor or soft soil is replaced with compacted crushed rock before the first course goes down.
Lake Washington shoreline, the Sammamish River, Swamp Creek and Little Swamp Creek carry shoreline and stream buffers. Many slopes are mapped critical areas. Water is the number one cause of wall failure here, so every wall gets drain rock and a drain pipe behind it.
Common retaining walls projects in Kenmore
Terracing sloped yards
Block and rock walls that turn sloped Kenmore yards into level, usable space.
Driveway and parking walls
Walls that widen or support driveways and parking pads on Downtown Kenmore and Inglewood lots.
Replacing failing walls
Leaning timber, block and rock walls in Kenmore removed and rebuilt with a proper base and drainage.
Garden and patio walls
Shorter block walls around Kenmore patios, beds and steps.
What our retaining walls work in Kenmore covers
- Block Retaining Walls
- Rock & Boulder Walls
- Wall Drainage
- Excavation & Base Prep
- Backfill & Compaction
- Old Wall Removal
Permits & Rules
Retaining wall permits in Kenmore
Walls taller than about four feet, or walls supporting a driveway, building or slope, typically need an engineered design and a permit from the City of Kenmore. Outside city limits, the King County Department of Local Services handles it.
On mapped steep slopes or landslide hazard areas, a geotechnical review is often required as well. We build to the approved plan.
Cost & Timing
What affects the cost of retaining walls in Kenmore
We do not publish flat prices because no two Kenmore sites are the same. These are the things that move the number most here.
Slope and access
Steep Kenmore lots take smaller machines, more careful staging and sometimes engineering, which adds time compared with flat, open ground.
Soft ground
Where Kenmore 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 Kenmore'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 Kenmore jobs.
When to schedule retaining walls in Kenmore
Retaining Walls in Kenmore 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.
Kenmore'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
Retaining walls across Kenmore
Kenmore sits at the north end of Lake Washington where the Sammamish River enters it. Much of the city is steep, wooded hillside above the lake and the Burke-Gilman Trail.
We build block and rock walls across Downtown Kenmore, Inglewood, Moorlands, Arrowhead, Uplands and Northshore Summit. Mostly 1950s to 80s homes on sloped, wooded lots, with newer infill and redevelopment near downtown.
Excavated soil is reused behind the wall where it suits, and the rest leaves on our own trucks via SR 522 (Bothell Way) and Juanita Dr NE.
We also do retaining walls nearby in Lake Forest Park, Bothell, Brier and Mountlake Terrace. See everything we do in Kenmore, read our full guide to retaining walls, or browse all service areas.
Why DirtRaptor
Why Kenmore owners call us for retaining walls
Owner on the machine
On Kenmore 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 Kenmore 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 SR 522 (Bothell Way) and Juanita Dr NE, not a subcontractor's.
Built for slopes
We plan machine placement, drainage and erosion control for Kenmore's sloped ground before we start.
How a retaining walls job runs
- 01
Plan & Permit
- 02
Excavate & Build the Base
- 03
Build With Drainage
- 04
Backfill & Finish Grade
Real Jobs
Recent DirtRaptor work near Kenmore
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
Retaining Wall Contractor in Kenmore: FAQs
Do I need a permit for a retaining wall in Kenmore?
+
Walls over about four feet, or walls holding up a driveway or slope, usually need engineering and a permit from the City of Kenmore. Shorter landscape walls usually do not.
What kind of walls work best in Kenmore?
+
Block walls suit yards, patios and driveways; rock and boulder walls suit wooded and rural properties. Either way, the base and drainage matter more than the face.
Why do retaining walls fail?
+
Most fail from water pressure behind the wall or a base that settles. Lake Washington shoreline, the Sammamish River, Swamp Creek and Little Swamp Creek carry shoreline and stream buffers. Drainage and a compacted base prevent both.
How much does retaining walls cost in Kenmore?
+
It depends on the site, so we quote after a free site walk rather than guessing on the phone. The biggest drivers in Kenmore 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 retaining walls in Kenmore?
+
Retaining Walls in Kenmore 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 remove a tree above my Kenmore house on a steep slope?
+
Yes. On slopes we usually take trees down in sections and leave stumps and roots in the ground to hold the soil. If the slope is a mapped critical area, we flag what review is needed.
Do you work along the Kenmore shoreline?
+
Yes, within the shoreline rules. Work near the lake or river can need approval, so we check before starting.
Do I need a permit for a retaining wall?
+
Walls over about four feet, or walls supporting a driveway, building or slope, usually need engineering and a permit. Shorter landscape walls usually do not. We confirm with your city or county before building.
Ready for a real number in Kenmore?
Send the address and a few photos. We walk the site for free and come back with a written quote.
