Stormwater permits in Lynnwood: fees, timeline & requirements (2026)
Everything you need to know about pulling a stormwater / drainage permit in Lynnwood, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Lynnwood Development & Business Services.
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to Lynnwood's source.
When does drainage work need a permit in Lynnwood?
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 Lynnwood's own code
“Because of potential impacts to surface water systems, a permit application for any land clearing in excess of one-eighth of an acre shall be submitted to the department of public works for processing as required by LMC 2.44.040. (Ord. 3443 § 1, 2023; Ord. 2833 § 2, 2010)”Source ↗verified 2026-09-06
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 Lynnwood?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Lynnwood and Snohomish County. Kolmo prepares the drawings and submittals, files the stormwater / drainage permit with Lynnwood Development & Business Services, carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a Lynnwood 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 drainage work in Lynnwood — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline, critical-area or historic overlays.
- 2. Assemble submittals: the 4 documents under Required submittals above.
- 3. Submit through the city portal: Lynnwood Development & Business Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Lynnwood'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 Lynnwood Development & Business Services, handles reviewer comments, and builds the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Stormwater permits in Lynnwood — FAQ
When does drainage work need a permit in Lynnwood?
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 Lynnwood?
Lynnwood's grading permit, where grading is over 50 cubic yards, is a $695 administrative fee plus inspection ($71 for 51 to 100 cubic yards) and plan review ($47 for 51 to 100 cubic yards, $71 for 101 to 1,000). A residential roof or foundation drain installation permit is $247 for 50 feet or less, or a connection to an existing drain within 50 feet, and $671 over 50 feet; a retention or detention system is $2,006. A 2.5% technology fee is added (LMC 3.104).