Stormwater permits in City of Redmond: fees, timeline & requirements (2026)
Everything you need to know about pulling a stormwater / drainage permit in City of Redmond, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Redmond uses ePlans portal..
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to City of Redmond's source.
When does a stormwater / drainage need a permit in City of Redmond?
Ecology's Stormwater Management Manual for Western Washington (SWMMWW, 2024 edition) is the state floor. A municipal stormwater permittee may instead adopt a REGIONAL manual Ecology has determined equivalent, and most do — some counties publish their own, some cities publish their own, and others adopt Ecology's directly. WHICH MANUAL APPLIES IS A PER-JURISDICTION FACT and it changes the numbers: review thresholds for new plus replaced impervious surface and for land-disturbing activity differ between manuals, so read this jurisdiction's own adopting chapter before quoting one. Critical-area and closed-basin parcels get stricter review under every manual.
From City of Redmond's own code
“A. All clearing, grading and stormwater management construction activities that do not involve any of the thresholds listed above do not require a separate clearing and grading, and stormwater or civil site stormwater permit, but still must meet the requirements specified in RMC 15.24.020 . B.”Source ↗verified 2026-05-29
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
Who can do this work in City of Redmond?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout City of Redmond and King County. Kolmo prepares the drawings and submittals, files the stormwater / drainage permit with Redmond uses ePlans portal., carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a City of Redmond 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 City of Redmond 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: Redmond uses ePlans portal. ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Drainage review fees are commonly tiered by project size in the city's fee schedule. Apply via https://eplans.redmond.gov.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull stormwater / drainage permits in City of Redmond every month. We prepare the drawings and submittals, file with Redmond uses ePlans portal., handle reviewer comments, and build the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Stormwater permits in City of Redmond — FAQ
When does a stormwater / drainage need a permit in City of Redmond?
Ecology's Stormwater Management Manual for Western Washington (SWMMWW, 2024 edition) is the state floor. A municipal stormwater permittee may instead adopt a REGIONAL manual Ecology has determined equivalent, and most do — some counties publish their own, some cities publish their own, and others adopt Ecology's directly. WHICH MANUAL APPLIES IS A PER-JURISDICTION FACT and it changes the numbers: review thresholds for new plus replaced impervious surface and for land-disturbing activity differ between manuals, so read this jurisdiction's own adopting chapter before quoting one. Critical-area and closed-basin parcels get stricter review under every manual.
How much does a stormwater / drainage permit cost in City of Redmond?
Current fee per the City of Redmond fee schedule: Drainage review fees are commonly tiered by project size in the city's fee schedule. Apply via https://eplans.redmond.gov.. Plus ancillary plan-review/tech-surcharge fees per city schedule.