ADU Permit Builder
Seattle, Washington
VerifiedLast verified: Feb 15, 20262 verified sources
Step 1 of 6
Project Basics
Your permit packet will include:
- Required forms: Master Application and Permit, and more
- Pre-filled templates: Permit Cover Sheet
- Fee breakdown: $2,500–$15,000 estimated total
- Step-by-step Seattle SDCI portal submission guide