How To Apply for a Detached Accessory Dwelling Unit Using a Standard Plan

1. Log into your Seattle Services Portal account or create one
2. Click on Permits – Trade, Construction, & Land Use link under Create New.
   
3. Expand Building Permits, click the Building & Land Use Pre-application radio button, and then click Continue Application
   
   
4. Enter your address and click Search
5. Verify or select your address and then click Continue
6. Identify an Applicant and Owner and then click Continue
7. Complete the Application Details fields
   • Select Yes when asked if you are making additions or changes to an existing building
     
   • Select Yes when asked if you plan to use an existing approved standard plan set
   • Provide a valid Standard Plan # 
   • Select Yes when asked if you think your project qualifies as a subject-to-field-inspection or a DADU standard plan
     
8. Click Continue Application
9. Complete the rest of the required Application Details fields and click Continue Application
   • Select No when asked if you are disturbing ground in an environmentally critical area
   • Select No when asked if you will have new and replaced hard surface greater than 750 square feet
   • Select No when asked if you are doing more than 2,000 square feet of earth disturbance
     
10. Upload the following documents:
    • Site plan with a legal description and parcel number
    • Salvage Assessment form
    • Statement of Financial Responsibility form (if required – see Director's Rule 5-2003 )
    • King County sewer treatment capacity charge form 
    • Plan set that includes a site plan showing the existing buildings on the site and the proposed DADU and the approved standard plans for the DADU
11. Click Continue Application
12. Review your information, make necessary edits, and then click Continue Application to submit your application
13. You will be contacted with the next steps to get your permit once we have processed the application