Bellevue · King County
Grading & Drainage in Bellevue, WA
Grading, French drains, retaining walls and RV and equipment pads across Bellevue, from Somerset to Bridle Trails. Built so water moves away from the house instead of toward it.
Why drainage matters on Bellevue properties
Glacial till over most of the city, outwash sand in places, and soft deposits around the lakes and the Mercer Slough. 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 hills between Lake Washington and Lake Sammamish, rising to steep slopes in Somerset, Newport Hills and the Cougar Mountain foothills. 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.
Lake Washington and Lake Sammamish shorelines, Kelsey Creek, Coal Creek, the Mercer Slough and many smaller streams carry shoreline and critical-area rules. Where drainage can legally discharge depends on these features, so we plan the outlet first and the trench second.
Common grading projects in Bellevue
Wet yards and crawlspaces
Regrading and French or curtain drains for Bellevue 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 Bellevue yards and driveways, built with drainage behind them so they last.
Pads for RVs, shops and equipment
Compacted gravel pads for RVs, trailers, shops and equipment on Bellevue properties, built thick enough not to rut in the wet season.
Grading away from the foundation
Reshaping the ground around Bellevue homes in Somerset and Newport Hills 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 Bellevue.
What our grading work in Bellevue 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 Bellevue
Inside city limits, the City of Bellevue handles grading permits; outside them, the King County Department of Local Services. 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 Bellevue
We do not publish flat prices because no two Bellevue sites are the same. These are the things that move the number most here.
Slope and access
Steep Bellevue lots take smaller machines, more careful staging and sometimes engineering, which adds time compared with flat, open ground.
Soft ground
Where Bellevue 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 Bellevue's rivers, creeks, lakes or shoreline can need permits and limits on where machines go. That affects scope and schedule more than price.
Size of the property
On Bellevue acreage, longer haul distances inside the property and bigger volumes change the math. Bigger jobs often cost less per unit.
Haul-off and disposal
How much material leaves the site, and what it is, drives cost. Our own trucks keep that predictable on Bellevue jobs.
When to schedule grading in Bellevue
Grading in Bellevue 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.
Bellevue'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.
At higher elevations around Bellevue, snow and freeze can close the season early, so foothill and mountain-side jobs are best booked for summer and early fall.
Where We Work
Grading and drainage across Bellevue
Bellevue covers a lot of ground, from lakefront and Bridle Trails horse properties to the steep hillsides of Somerset and Cougar Mountain. High-value homes, steep slopes and a careful permit desk make planning the most important part of any job here.
We regrade yards, install French drains and curtain drains, build block and rock retaining walls, and set gravel RV and equipment pads across Somerset, Newport Hills, Bridle Trails, Lake Hills, Crossroads, Factoria, Woodridge and Lakemont.
Mid-century homes in Lake Hills and Crossroads, hillside view homes in Somerset, and large new custom homes replacing older houses across the city. 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 Kirkland, Redmond, Seattle and Sammamish. See everything we do in Bellevue, read our full guide to grading, or browse all service areas.
Why DirtRaptor
Why Bellevue owners call us for grading
Owner on the machine
On Bellevue 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 Bellevue 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-405 and I-90, not a subcontractor's.
Built for slopes
We plan machine placement, drainage and erosion control for Bellevue'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 Bellevue
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 Bellevue: FAQs
Why does water collect around homes in Bellevue?
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Glacial till over most of the city, outwash sand in places, and soft deposits around the lakes and the Mercer Slough. 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 Bellevue?
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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 Bellevue (or the King County Department of Local Services outside city limits). Shorter landscape walls often do not. We confirm before building.
Where can drainage water go on my Bellevue 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. Lake Washington and Lake Sammamish shorelines, Kelsey Creek, Coal Creek, the Mercer Slough and many smaller streams carry shoreline and critical-area rules. We plan the outlet before we trench.
How much does grading cost in Bellevue?
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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 Bellevue 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 Bellevue?
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Grading in Bellevue 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.
Do I need a clearing and grading permit in Bellevue?
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It depends on the volume of soil moved and the area disturbed, and steep slopes or critical areas lower the threshold. We estimate the quantities during the site walk and tell you whether a permit is likely.
Can you do excavation on a steep Somerset lot?
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Yes. Steep lots need careful machine placement, erosion control and planned spoil haul-off so nothing is stockpiled on the slope. A geotechnical report is often part of the permit.
Can you fix standing water in my yard?
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Usually. The first step is finding where the water is actually coming from — downspouts, a neighbouring property, road runoff or a high water table all present as the same soggy lawn but need different solutions. We assess before we quote.
Ready for a real number in Bellevue?
Send the address and a few photos. We walk the site for free and come back with a written quote.
