Basement finish permits in Bellevue: fees, timeline & requirements (2026)
Everything you need to know about pulling a basement finish permit in 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 — the office that issues the permit at your address, and a layout of the room, cited to Bellevue's source.
When does a basement finish need a permit in 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 Bellevue adopted this rule
The threshold comes from the state code (WAC 51.51), which 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 Bellevue says in its own permit handout
From Work Requiring Commercial and Residential Permits, published by 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 contractor · Electrician (journey-level 01 or residential 02) · Plumber · Mechanical contractor
Who can do this work in Bellevue?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout 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 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 estimate in Bellevue
Worked example for a $40,000 basement finish project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $1,014.55 |
| Plan review | $659.46 |
| WA state surcharge | $6.50 |
| Estimated total | $1,680.51 |
Bellevue prices a basement finish's building permit on the value of the work: $44 up to $500, $44 plus $6.39 for each $100 more up to $2,000, $139.85 for the first $2,000 plus $25.60 for each $1,000 more up to $25,000, and $728.65 for the first $25,000 plus $19.06 for each $1,000 more up to $50,000, each prorated. Plan review is 65% of that fee and the operations fee $53 (Ordinance 6879), and the state building code fee is $6.50 on a residential permit (RCW 19.27.085). Where the remodel needs land use review, that is $304. Bellevue, not L&I, issues the electrical permit, priced on the value of the electrical work: $79 up to $500, $79 plus $11.82 for each $100 more up to $2,000, and $256.30 for the first $2,000 plus $34.86 for each $1,000 more up to $25,000. Plumbing is $50 for the first fixture and $17.34 for each one more; mechanical is $59 for each furnace, heat pump, air conditioner or gas appliance and $34 for each fan. Each trade permit carries a $21 operations fee over the counter, or $53 and a $145 plan review fee when its scope needs building review. Apply via mybuildingpermit.com. Computed from Bellevue'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. Check who issues the permit. Run an address lookup for your basement finish in Bellevue — we'll confirm which office issues the permit at that address, and you can lay out the room.
- 2. Assemble submittals: the 3 documents under Required submittals above.
- 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 (about $1,681 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 Bellevue Development Services, handles reviewer comments, and builds the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Basement finish permits in Bellevue — FAQ
When does a basement finish need a permit in 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 Bellevue?
For a $40,000 basement finish project, the estimated Bellevue permit fee is about $1,680.51 (building fee $1,014.55 + plan review $659.46 + surcharges) from Bellevue's adopted fee schedule. Land use, fire and engineering review, intake, impact and utility fees, where they apply, are charged separately.
How long does Bellevue take to review a basement finish permit?
Typical review window: 14–30 days.