Basement finish permits in Woodinville: fees, timeline & requirements (2026)
Everything you need to know about pulling a basement finish permit in Woodinville, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Woodinville Development Services.
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to Woodinville's source.
When does a basement finish need a permit in Woodinville?
Finishing or altering a basement needs a building permit in Woodinville (WMC 21.62.010). The City's exempt list covers only finish work such as painting, carpet, tile and cabinets (WMC 21.62.070 item 6). A bedroom needs an emergency escape opening (IRC R310), and habitable rooms need 7 ft ceilings (IRC R305). Plumbing and mechanical work rides on the City's Combined Building Permit. Electrical work needs a permit from L&I: the City issues no electrical permits and does no electrical inspections. Woodinville must decide a building permit within 120 days of a complete application, not counting the time it waits on the applicant (WMC 21.80.210(3)).
From Woodinville's own code
“2021 Edition of the International Residential Code, Chapter 51-51 WAC”Source ↗verified 2026-11-07
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 contractor · Electrician (journey-level 01 or residential 02) · Plumber · Mechanical contractor
Who can do this work in Woodinville?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Woodinville and King County. Kolmo prepares the drawings and submittals, files the basement finish permit with Woodinville Development Services, carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a Woodinville 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 estimate in Woodinville
Worked example for a $40,000 basement finish project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $750 |
| Plan review | $487.50 |
| WA state surcharge | $6.50 |
| Estimated total | $1,244 |
Plan-review fee scales with valuation. State surcharge $6.50. Apply through Woodinville's online Permit Portal (aca-prod.accela.com/woodinville/default.aspx); the Apply for a Permit Online page (woodinville.gov/347/Apply-for-a-Permit-Online) explains the account setup. Computed from Woodinville's adopted fee schedule · source ↗. Land use, fire and engineering review, intake, impact and utility fees, where they apply, are charged separately.
How to apply yourself
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your Woodinville 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: Woodinville Development Services ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (about $1,244 for a $40,000 project) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
Kolmo prepares the drawings and submittals, files with Woodinville Development Services, handles reviewer comments, and builds the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Basement finish permits in Woodinville — FAQ
When does a basement finish need a permit in Woodinville?
Finishing or altering a basement needs a building permit in Woodinville (WMC 21.62.010). The City's exempt list covers only finish work such as painting, carpet, tile and cabinets (WMC 21.62.070 item 6). A bedroom needs an emergency escape opening (IRC R310), and habitable rooms need 7 ft ceilings (IRC R305). Plumbing and mechanical work rides on the City's Combined Building Permit. Electrical work needs a permit from L&I: the City issues no electrical permits and does no electrical inspections. Woodinville must decide a building permit within 120 days of a complete application, not counting the time it waits on the applicant (WMC 21.80.210(3)).
How much does a basement finish permit cost in Woodinville?
For a $40,000 basement finish project, the estimated Woodinville permit fee is about $1,244 (building fee $750 + plan review $487.50 + surcharges) from Woodinville's adopted fee schedule. Land use, fire and engineering review, intake, impact and utility fees, where they apply, are charged separately.