Basement finish permits in City of Lynnwood: fees, timeline & requirements (2026)
Everything you need to know about pulling a basement finish permit in City of 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 uses its own permit center..
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to City of Lynnwood's source.
When does a basement finish need a permit in City of Lynnwood?
2021 IRC R310: every sleeping room below grade requires emergency escape and rescue opening (egress window). Min sill height 44in, min net clear opening 5.7 sq ft (5.0 grade-floor), min width 20in, height 24in. Ceiling height min 7ft (R305). Entire newly conditioned area must comply with WSEC R402.
How City of Lynnwood adopted this rule
The threshold comes from the state code (WAC 51.51), which City of Lynnwood adopts by reference in the provision quoted below.
“As amended by the provisions of this chapter and the State of Washington Building Code Council, under Chapter 51-50 WAC, the latest edition of the International Building Code, published by the International Code Council, together with Appendices E, G, and J, one copy of which, along with the State of Washington Building Code Council’s amendments, shall be on file in the office of the Lynnwood city clerk, are adopted by reference. (Ord. 3404 § 3 (Att. A), 2021; Ord. 3396 § 3, 2021; Ord. 3306 § 1 (Exh. 1), 2018; Ord. 3196 § 3, 2016; Ord.”Source ↗verified 2026-04-26
Required submittals
- floor plan w/ egress windows + ceiling heights
- electrical layout
- plumbing diagram
- mechanical / HVAC plan
- WSEC compliance form (newly conditioned space)
- smoke/CO alarm locations
Inspection sequence
- rough-in (electrical/plumbing/mechanical)
- framing
- insulation
- drywall
- final
Contractor specialties needed
general, electrical-01-or-02, plumbing, mechanical
Who can do this work in City of Lynnwood?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout City of Lynnwood and Snohomish County. Kolmo prepares the drawings and submittals, files the basement finish permit with Lynnwood uses its own permit center., carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a City of Lynnwood basement finish quote.
Notes & caveats
Construction permit required for any habitable space addition. Smoke + CO alarms required (R314, R315). Any new circuits, plumbing fixtures, or HVAC requires trade permits.
Basement finish permit fee — Washington baseline, not City of Lynnwood's own schedule
Worked example for a $40,000 basement finish project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $542.75 |
| Plan review | $352.79 |
| WA state surcharge | $6.5 |
| Estimated total | $902.04 |
Plan-review fee scales with valuation. State surcharge $6.50. We have not read City of Lynnwood's adopted fee schedule, so this is not City of Lynnwood's fee: it walks the standard valuation table most Washington cities adopt by reference, as a rough guide. The real numbers are in City of Lynnwood's fee schedule ↗. Impact/utility fees may apply separately.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Lynnwood basement finish — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (6).
- 3. Submit through the city portal: Lynnwood uses its own permit center. ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (Plan-review fee scales with valuation. State surcharge $6.50.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull basement finish permits in City of Lynnwood every month. We prepare the drawings and submittals, file with Lynnwood uses its own permit center., handle reviewer comments, and build the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Basement finish permits in City of Lynnwood — FAQ
When does a basement finish need a permit in City of Lynnwood?
2021 IRC R310: every sleeping room below grade requires emergency escape and rescue opening (egress window). Min sill height 44in, min net clear opening 5.7 sq ft (5.0 grade-floor), min width 20in, height 24in. Ceiling height min 7ft (R305). Entire newly conditioned area must comply with WSEC R402.
How much does a basement finish permit cost in City of Lynnwood?
For a $40,000 basement finish project, the estimated City of Lynnwood permit fee is about $902.04 — building fee $542.75 + plan review $352.79 + surcharges. Fees scale with project valuation per the city schedule.