Roofing Permits in Seattle, WA
Everything you need to know about roofing permits and requirements in Seattle.
Whether a permit is needed depends on the scope of work — replacing roofing like-for-like is treated differently from work touching sheathing, roof pitch, skylights or rooftop equipment. Fees are usually set on project valuation rather than a flat rate; across King and Snohomish counties they generally run $150–$600. Confirm both with Seattle before you budget — see the city's permit page.
Seattle Roofing Permit Requirements
For most Seattle homeowners, a re-roof permit is not required. The Seattle Department of Construction and Inspections exempts re-roof work at one- and two-family homes and townhouses where nothing about the building envelope changes except adding or replacing insulation, and the new insulation is equal to or better than what was there.
A permit is required when the work alters the building envelope in any other way — changing the roof pitch, adding or relocating skylights or mechanical units, or structural work to the deck. Commercial and multifamily projects need a permit once the repaired area exceeds 500 square feet.
Where a permit is needed, SDCI charges half its base fee plus the state surcharge and a technology fee, so the amount depends on project valuation rather than a flat rate. SDCI applied an inflationary increase to most fees on 1 January 2026.
Application Process
Required Documents
- Completed building permit application (via Seattle Services Portal)
- Site plan showing property boundaries and structure locations
- Roofing material specifications and manufacturer data sheets
- Contractor license number and proof of insurance
- Historic district review documentation (if applicable)
Inspection Requirements
- Pre-roofing inspection (after tear-off, before new material installation)
- Final inspection (after project completion)
- Additional inspections may be required for larger or complex projects
- Schedule through the Seattle Services Portal
Seattle Permit Resources
Seattle Dept. of Construction & Inspections (SDCI)
Official permit information and requirements.
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