Stormwater permits in City of Federal Way: fees, timeline & requirements (2026)

Everything you need to know about pulling a stormwater / drainage permit in City of Federal Way, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Apply via MyBuildingPermit.com..

Permit required?
Yes — see threshold below
Permit fee
Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+.
Review timeline

When does a stormwater / drainage need a permit in City of Federal Way?

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

  1. pre-construction (BMPs in place)
  2. facility installation
  3. 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.

Stormwater permit fee estimate in City of Federal Way

Worked example for a $25,000 stormwater / drainage project (building permit). Your actual fee scales with project valuation.

Building permit fee$391.25
Plan review$254.31
WA state surcharge$4.5
Estimated total$650.06

Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+. Computed from the City of Federal Way fee bracket schedule · source ↗. Impact/utility fees may apply separately.

How to apply

  1. 1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Federal Way stormwater / drainage — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
  2. 2. Assemble submittals (4).
  3. 3. Submit through the city portal: Apply via MyBuildingPermit.com.
  4. 4. Track review (typical: ). Respond to reviewer comments promptly.
  5. 5. Pay issuance fees (Drainage review fee commonly tiered by project size; small project ~$300-$800, full drainage review $1,500+.) and pick up the permit. Inspection card travels with the job.

Stormwater permits in City of Federal Way — FAQ

When does a stormwater / drainage need a permit in City of Federal Way?

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.

How much does a stormwater / drainage permit cost in City of Federal Way?

For a $25,000 stormwater / drainage project, the estimated City of Federal Way permit fee is about $650.06 — building fee $391.25 + plan review $254.31 + surcharges. Fees scale with project valuation per the city schedule.

City of Federal Way resourcesPermit portal ↗Fee schedule ↗