Siding permits in City of Seattle: fees, timeline & requirements (2026)
Everything you need to know about pulling a siding permit in City of 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).
When does a siding need a permit in City of Seattle?
Per SDCI, like-for-like siding replacement on a detached one- or two-family house needs no permit when there is no structural change, no change to the building envelope, and the new work is at least as good as the existing. Adding continuous insulation, changing the WRB system, or any modification that affects WSEC compliance triggers a Subject-to-Field-Inspection permit.
Required submittals
- if permit required: WRB + flashing details, fastener schedule, WSEC continuous insulation calc
Inspection sequence
- WRB / flashing inspection (if permit required)
- final
Contractor specialties needed
general
Notes & caveats
WRB + flashing details inspected if permit issued. ECA proximity may trigger additional review. Basis is SDCI "Do You Need a Permit?" guidance under the Seattle Residential Code — NOT base IRC R105.2, which does not enumerate siding.
Siding permit fee estimate in City of Seattle
Worked example for a $18,000 siding project (building permit). Your actual fee scales with project valuation.
| Building permit fee | $381.23 |
| Plan review | $247.8 |
| Technology surcharge | $19.06 |
| WA state surcharge | $4.5 |
| Estimated total | $652.59 |
Often exempt. If permit required, Subject-to-Field-Inspection. Computed from the City of Seattle fee bracket schedule · source ↗. Impact/utility fees may apply separately.
How to apply
- 1. Confirm your parcel's zoning & overlays. Run an address lookup for your City of Seattle siding — we'll pull your specific lot polygon, zoning, setbacks, and any shoreline/ECA/historic overlays.
- 2. Assemble submittals (1).
- 3. Submit through the city portal: Seattle Department of Construction & Inspections (SDCI) ↗
- 4. Track review (typical: —). Respond to reviewer comments promptly.
- 5. Pay issuance fees (Often exempt. If permit required, Subject-to-Field-Inspection.) and pick up the permit. Inspection card travels with the job.
Siding permits in City of Seattle — FAQ
When does a siding need a permit in City of Seattle?
Per SDCI, like-for-like siding replacement on a detached one- or two-family house needs no permit when there is no structural change, no change to the building envelope, and the new work is at least as good as the existing. Adding continuous insulation, changing the WRB system, or any modification that affects WSEC compliance triggers a Subject-to-Field-Inspection permit.
How much does a siding permit cost in City of Seattle?
For a $18,000 siding project, the estimated City of Seattle permit fee is about $652.59 — building fee $381.23 + plan review $247.8 + surcharges. Fees scale with project valuation per the city schedule.