Seattle’s frequent winter rains push leaves, sediment and debris into storm lines faster than in drier regions. Older clay and cast-iron pipes common in Queen Anne, Fremont and Capitol Hill trap roots and silt that standard household plungers cannot reach. We use high-pressure jetting heads sized for 4- to 12-inch municipal laterals and follow King County right-of-way rules when work crosses the sidewalk or curb.
Terrain matters here. Hills in West Seattle and Discovery Park create steep runs that let heavy sediment settle in low spots, while flat sections in the University District and Belltown collect standing water that breeds mosquitoes. We locate cleanouts first, then rod or jet from the lowest accessible point upward so debris flows out rather than deeper into the system. Overcast summers reduce evaporation, so even small blockages can linger until the next rain event.
We also clear catch basins and area drains around Pike Place Market vendors and Seattle Center event spaces where foot traffic and food waste add organic load. After each job we run a camera to confirm flow and note any offset joints or bellies that will need attention before the next wet season.
Homeowners in Ballard and nearby Kirkland often call after noticing slow backyard drains or water pooling near foundations. Addressing these lines before they back up into basements prevents the mold and drywall damage that follows repeated winter storms.
Technician insight
In Seattle, the thing that catches most people out with Storm Drain Cleaning is how quickly wet-winter sediment packs into the older clay lines on Queen Anne and Capitol Hill; what looks like a simple slow drain is often a belly full of silt that needs jetting from the downstream cleanout, not just the yard drain.
West Seattle Backyard Flooding
A homeowner noticed water pooling near the foundation after several days of rain. We found a storm line half-filled with sediment and pine needles from nearby trees. Jetting from the curb cleanout restored full flow and the camera showed no breaks, so the yard stayed dry through the rest of the season.
Storm Drain Cleaning Services We Offer
✓Catch Basin Cleaning
Remove leaves, sediment and trash from street and yard catch basins so winter runoff reaches the main storm line without flooding sidewalks in Capitol Hill or Ballard.
✓Storm Drain Jetting
High-pressure water jetting clears grease, roots and compacted silt from 4- to 12-inch storm laterals common in older Fremont and Queen Anne homes.
✓Root Removal From Storm Drains
Cut and extract tree roots that invade storm lines near Discovery Park and West Seattle green belts before they cause full blockages during heavy rain.
✓Sediment and Debris Extraction
Vacuum and rod sediment that settles in flat runs around the University District and Belltown where overcast weather slows natural drying and flushing.
✓Emergency Storm Drain Unclogging
Same-day response for sudden backups after storms, available to homes and small businesses within King County including Bellevue and Kirkland.
Storm Drain Cleaning Cost in WA
| Service | Typical Range | What Affects It |
|---|---|---|
| Catch Basin Cleaning | $225–$475 | Varies with sediment depth and whether street access or traffic control is needed |
| Storm Drain Jetting | $350–$750 | Depends on pipe length, diameter and root density |
| Root Cutting And Extraction | $400–$850 | Higher when multiple laterals or heavy root mats are present |
| Emergency After-Hours Call | $150–$300 | Added to base service when scheduled outside Mon–Fri 8–6 or Sat 9–2 |
Ranges are typical for WA and confirmed with an exact written quote before any work starts.
How it works
- 1
Site Assessment
We inspect cleanouts and surface drains, note pipe material and slope, and check for recent construction or tree growth that affects access in Seattle neighborhoods.
- 2
Equipment Setup
Hoses and jetting heads are staged at the lowest point, with containment for water and debris to protect sidewalks and landscaping per local codes.
- 3
Jetting And Rodding
Progressive passes from downstream to upstream break up and flush material while we monitor flow at the next cleanout or catch basin.
- 4
Camera Verification
A final camera run confirms the line is clear and documents any remaining defects before we restore access points and clean the work area.
Pricing
Most storm drain jobs are quoted after an on-site look at access and debris volume.