Stormwater permits in City of Shoreline: fees, timeline & requirements (2026)
Everything you need to know about pulling a stormwater / drainage permit in City of Shoreline, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Shoreline uses its own permit center..
When does a stormwater / drainage need a permit in City of Shoreline?
KC Surface Water Design Manual 2021 (KCC 9.04 + adopted by reference in most KC cities) sets the 2,000 sqft new+replaced impervious threshold for "small project" drainage review; ≥5,000 sqft triggers full drainage review. Different thresholds in critical-area drainage basins.
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
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
- 1. Confirm your parcel's zoning & overlays. Run an address lookup on the main permits page — 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: Shoreline uses its own permit center. ↗
- 4. Track review (typical: —). Respond to reviewer comments promptly.
- 5. Pay issuance fees (Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+. Apply via https://www.shorelinewa.gov/government/departments/planning-community-development. Shoreline uses its own permit center.) and pick up the permit. Inspection card travels with the job.