Flooring permits in Seattle: fees, timeline & requirements (2026)
Everything you need to know about pulling a flooring permit in Seattle, Washington — when one is required, what it costs, how long review takes, what documents are required, and which inspections you can expect. Cited to Seattle Department of Construction & Inspections (SDCI).
Free lookup, no account needed — the office that issues the permit at your address, the mapped areas on the lot, cited to Seattle's source.
When does new flooring need a permit in Seattle?
Surface flooring exempt under 2021 IRC R105.2. Subfloor structural modification, joist alterations, or radiant heat install requires permit (mechanical/electrical for radiant).
How Seattle adopted this rule
The threshold comes from the state code (WAC 51.51), which Seattle adopts by reference in the provision quoted below.
“Seattle Residential Code 2021 International Residential Code, Chapters 2 through 10, 12 through 24, 29, and 44 and Appendices AF, AQ, and AT Chapters 1 and 44, in Attachment I to this ordinance”Source ↗verified 2026-04-26
Contractor specialties needed
General contractor
Who can do this work in Seattle?
Kolmo Construction is a licensed Washington general contractor — KOLMOL*753JS, active through April 10, 2027, bonded and insured — working throughout Seattle and King County. Kolmo prepares the drawings and submittals, files the flooring permit with Seattle Department of Construction & Inspections (SDCI), carries the project through review and inspections, and performs the construction. Call (206) 410-5100 for a Seattle flooring quote.
Notes & caveats
Radiant in-floor heat: mechanical permit (electric) or plumbing permit (hydronic).
Flooring permit fee estimate in Seattle
Worked example for a $6,000 flooring project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $405 |
| Plan review | $162 |
| Technology surcharge | $28.35 |
| WA state surcharge | $6.50 |
| Estimated total | $601.85 |
Where flooring work needs a permit, it is for the work around it: an electric radiant floor takes an SDCI electrical permit ($23.36 for a 3 to 15 kW heater, plus the $55.48 administrative fee, minimum $105.12), a hydronic one a Public Health – Seattle & King County permit, and structural floor repair a value-based SDCI building permit ($325 for the first $1,000 of value, plus $1.60 for each $100 more to $25,000, with plan review 40% of that, minimum $116.75). A 5% technology fee is added to SDCI fees. Computed from Seattle'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 new flooring in Seattle — we'll confirm which office issues the permit at that address and whether the lot is in a critical area or a flood hazard area, which Seattle's rule turns on.
- 2. Assemble submittals: the application and what it asks for, as Seattle Department of Construction & Inspections (SDCI) lists them.
- 3. Submit through the city portal: Seattle Department of Construction & Inspections (SDCI) ↗
- 4. Track review. Respond to reviewer comments promptly.
- 5. Pay issuance fees (about $602 for a $6,000 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 Seattle Department of Construction & Inspections (SDCI), handles reviewer comments, and builds the project.
Licensed WA general contractor KOLMOL*753JS · bonded & insured
Flooring permits in Seattle — FAQ
When does new flooring need a permit in Seattle?
Surface flooring exempt under 2021 IRC R105.2. Subfloor structural modification, joist alterations, or radiant heat install requires permit (mechanical/electrical for radiant).
How much does a flooring permit cost in Seattle?
For a $6,000 flooring project, the estimated Seattle permit fee is about $601.85 (building fee $405 + plan review $162 + surcharges) from Seattle's adopted fee schedule. Land use, fire and engineering review, intake, impact and utility fees, where they apply, are charged separately.