Basement finish permits in City of Bellevue: fees, timeline & requirements (2026)
Everything you need to know about pulling a basement finish permit in City of Bellevue, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Bellevue Development Services.
Free lookup, no account needed — your lot polygon, zoning, setbacks and overlays, cited to City of Bellevue's source.
When does a basement finish need a permit in City of Bellevue?
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 Bellevue adopted this rule
The threshold comes from the state code (WAC 51.51), which City of Bellevue adopts by reference in the provision quoted below.
“The following codes, all as amended, added to, or excepted in this chapter, together with all amendments and additions provided in this title, are adopted and shall be applicable within the city of Bellevue: A. International Building Code. 1. Code Adoption.”Source ↗verified 2026-05-17
What City of Bellevue says in its own permit handout
From Work Requiring Commercial and Residential Permits, published by City of Bellevue. This is the jurisdiction's own guidance on its permit process, not the ordinance text — where the two differ, the code governs.
“A permit is required for a remodel that changes the interior of the house without disturbing structural elements, such as creating new walls or converting basements to living areas.”Handout ↗read 2026-09-05
Required submittals
- Architectural Plan (Bellevue SF Remodel Permit — Required Documents)
- Structural Plan (Additional Documents — required during plan review)
- Energy Code Sheet (newly conditioned space)
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 Bellevue?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout City of Bellevue and King County. Kolmo prepares the drawings and submittals, files the basement finish permit with Bellevue Development Services, carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a City of Bellevue basement finish quote.
Notes & caveats
Bellevue lists "Converting a garage or unfinished basement into living space" as a covered scope under SF Remodel Permit (with structural work). Apply via MBP under Activity=Remodel. New conditioned area requires Energy Code Sheet per BCC 23.05 + WSEC.
Basement finish permit fee — Washington baseline, not City of Bellevue'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. Apply via https://mybuildingpermit.com. We have not read City of Bellevue's adopted fee schedule, so this is not City of Bellevue'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 Bellevue'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 Bellevue basement finish — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (3).
- 3. Submit through the city portal: Bellevue Development Services ↗
- 4. Track review (typical: 14–30 days). Respond to reviewer comments promptly.
- 5. Pay issuance fees (Plan-review fee scales with valuation. State surcharge $6.50. Apply via https://mybuildingpermit.com.) and pick up the permit. Inspection card travels with the job.
Or have Kolmo do it
We pull basement finish permits in City of Bellevue every month. We prepare the drawings and submittals, file with Bellevue Development Services, handle reviewer comments, and build the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Basement finish permits in City of Bellevue — FAQ
When does a basement finish need a permit in City of Bellevue?
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 Bellevue?
For a $40,000 basement finish project, the estimated City of Bellevue permit fee is about $902.04 — building fee $542.75 + plan review $352.79 + surcharges. Fees scale with project valuation per the city schedule.
How long does City of Bellevue take to review a basement finish permit?
Typical review window: 14–30 days.