Yard Drainage Solutions for Seattle-Area Properties
Ponding water on the lawn. Soggy zones that never dry out. A downspout turning one corner of the yard into a marsh every winter. All Pro Landscaping & Construction Services LLC diagnoses the cause and builds the fix — French drains, regrading, dry wells, and downspout routing across King & Snohomish County.
✓ Diagnosis first — the fix matches the cause ✓ French drains, regrading, dry wells ✓ Lawn restored as part of the scope
Wet yards in Western Washington come from two compounding causes: glacial till soils that barely drain, and grading that traps water instead of moving it. Surface ponding is usually a grading problem; ground that stays spongy long after rain is a subsurface problem. They have different fixes — which is why we diagnose on site before proposing anything.
Landscape Drainage We Build
French Drains
Gravel-and-perforated-pipe systems that collect subsurface water and carry it to a safe dispersal point — the standard fix for soggy zones, slope seepage, and wet ground beside patios and walls.
Regrading & Low-Spot Correction
Reshaping the surface so water moves where it should — away from structures, out of the low spots that pond after every rain. Often the whole fix for surface ponding, and cheaper than pipe.
Downspout Routing
Roof water is a huge share of yard water. We route downspout discharge through buried solid pipe to dispersal points instead of letting it dump at the foundation or onto the lawn.
Dry Wells & Dispersal
Where there’s no natural low point to send water, a dry well lets collected water soak into deeper, better-draining soil layers on your own property.
Catch Basins & Channel Drains
Collection points for hard surfaces and concentrated flows — at the base of slopes, beside driveways, along patio edges — piped to dispersal.
Drainage + Lawn Restoration
Trenched areas finished with fresh sod as one scope: fix the water, then finish the lawn. Our most common project pairing.
Diagnosis Before Design
Selling a French drain to every wet yard is how drainage gets a bad name. The right fix depends on where the water is:
- Water sits on the surface in the same spots after rain: grading problem — the yard is shaped to trap it. Fix: regrade the low spots with positive slope to a dispersal path.
- Ground stays spongy long after rain stops: subsurface water — moving through soil or perched on till. Fix: French drain intercepting the water and carrying it to dispersal.
- Wet zone traces to a downspout: concentrated roof water. Fix: buried downspout line to a dispersal point — often the cheapest and highest-impact drainage work on the property.
- Water arrives from upslope: interception — a drain line or swale placed uphill of the problem, catching water before it reaches lawn or hardscape.
- Combination cases: most yards. The design mixes grading, collection, and dispersal — priced as one coordinated scope.
Got a spot that never dries out?
Send photos of the wet area after a rain — we can usually tell you the likely cause and fix before we visit.
What Determines Drainage Cost
- Diagnosis — grading fix, subsurface system, or combination
- Linear footage and depth of drain lines
- Discharge solution: dry well, dispersal area, or graded release
- Trenching access — machine vs. hand-dig areas
- Lawn and landscape restoration after the work
Drainage Questions, Answered Straight
Why does water pond on my lawn?
Glacial soils that barely drain plus grading that traps water — with downspout discharge and soil compaction making it worse. The fix depends on which of those is doing the damage at your place.
Is a French drain what I need?
Only if the water is in the soil. Surface ponding is usually a grading fix. Spongy, saturated ground is a French drain case. Many yards need both.
Where does the water go?
To a safe dispersal point on your property — a dry well, rock dispersal area, or graded release — away from foundations, never onto the neighbors.
Will my yard be destroyed?
No — trenching is targeted, backfilled the same visit, and disturbed lawn is finished with fresh sod as part of the scope.
What does it cost?
Depends on the diagnosis: footage, depth, discharge solution, access, and restoration. Clear scope and cost expectations after we’ve seen the water problem on site.
Fix the Water Before It Costs You a Lawn — or a Wall
Landscape drainage diagnosed and built right. (425) 329-5683
Related Services
Drainage frequently combines with:
Sod Installation (finish the lawn after the fix) · Retaining Walls (wall drainage is structural) · Paver Patios · Full Backyard Remodels