Stormwater permits in Woodinville: fees, timeline & requirements (2026)
Everything you need to know about pulling a stormwater / drainage permit in Woodinville, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Woodinville Development Services.
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to Woodinville's source.
When does drainage work need a permit in Woodinville?
Woodinville requires a site development permit for most land-disturbing work. Outside a critical area or its buffer, none is needed when all three hold: under 25 cubic yards of earth moved in the R-1 to R-8 zones (50 in other zones), under 2,000 sq ft of new or replaced impervious surface, and under 7,000 sq ft disturbed in any 12 months. Digging foundations and footings under a building permit, topsoil up to 6 in at a house, and pavement maintenance are also exempt. The application includes a drainage report, an erosion control plan and a tree protection plan.
In the source's own words
“You need a site development permit for any land disturbing activity that result in a change in the existing soil cover, both vegetative and nonvegetative, and/or the existing soil topography.”Source ↗verified 2026-11-07
What Woodinville says in its own permit handout
From Site Development Permit Application Including Submittal Checklist (PDF) (dated March 10, 2026), published by Woodinville. This is the jurisdiction's own guidance on its permit process, not the ordinance text — where the two differ, the code governs.
“If the total site grading quantity (excluding the building footprint) is greater than 25 cy in the R-1 through R-8 zone or greater than 50 cy in all other zones, OR if grade level is changed by more than 4 feet in any one location, a SDL Permit is required.”Checklist ↗read 2026-09-05
Required submittals
- Drainage report (full or simplified)
- Site plan with impervious calc
- BMP / facility detail
- Geotech if infiltration claimed
Inspection sequence
- Pre-construction (BMPs in place)
- Facility installation
- Final stabilization
Contractor specialties needed
General contractor
Who can do this work in Woodinville?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Woodinville and King County. Kolmo prepares the drawings and submittals, files the stormwater / drainage permit with Woodinville Development Services, carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a Woodinville stormwater / drainage quote.
Notes & caveats
Issuing body is city public works / county DPER, often parallel to the building permit. On-site infiltration / detention required where infeasible to discharge to municipal storm. Critical-area parcels (steep slope, salmon-bearing watercourse) get more conservative review.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your Woodinville stormwater / drainage — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (4).
- 3. Submit through the city portal: Woodinville Development Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Woodinville's fee schedule sets them) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
Kolmo prepares the drawings and submittals, files with Woodinville Development Services, handles reviewer comments, and builds the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Stormwater permits in Woodinville — FAQ
When does drainage work need a permit in Woodinville?
Woodinville requires a site development permit for most land-disturbing work. Outside a critical area or its buffer, none is needed when all three hold: under 25 cubic yards of earth moved in the R-1 to R-8 zones (50 in other zones), under 2,000 sq ft of new or replaced impervious surface, and under 7,000 sq ft disturbed in any 12 months. Digging foundations and footings under a building permit, topsoil up to 6 in at a house, and pavement maintenance are also exempt. The application includes a drainage report, an erosion control plan and a tree protection plan.
How much does a stormwater / drainage permit cost in Woodinville?
Current fee per the Woodinville fee schedule: Drainage review fees are commonly tiered by project size in the local fee schedule. Apply through Woodinville's online Permit Portal (https://aca-prod.accela.com/woodinville/default.aspx); the Apply for a Permit Online page (https://www.woodinville.gov/347/Apply-for-a-Permit-Online) explains the account setup. Plus ancillary plan-review/tech-surcharge fees per city schedule.