Greater Seattle Building Permits Guide
L&I bonded registration mandatory; Seattle SDCI permits required for structural/MEP. Licensing in WA is managed by WA L&I Contractor Registration + bond. Most Greater Seattle homeowners should require their contractor to pull permits in the contractor's name so liability for code violations rests with them.
Key points
- Confirm whether your scope triggers a WA permit (structural, electrical, plumbing, mechanical, additions, demo).
- Have your licensed contractor pull the permit in their name — this shifts inspection liability to them.
- Budget 1–3% of project value plus plan-check fees (USD 200–USD 1,500 depending on scope).
- Schedule rough-in and final inspections in advance — re-inspections cost extra and delay the build.