Are you thinking about building an ADU?
The following checklists will help you understand city requirements, what you’ll need to consider and what to submit for your building permit application.

Please remember:

• This is a sample Permit Application Checklist. Your local jurisdiction may require slightly different information.

• Most jurisdictions have downloadable checklists available from their websites.

• We are here to help. If you need help or have any questions, please contact us or your local planning department.

• You can also visit Napa Sonoma ADU for additional resources:

  • Get inspired by looking sample floorplans and photos,

  • Use the Address Look-Up Tool to find out what you are eligible to build or the ADU Calculator to estimate costs or rents.

  • Download the free ADU Workbook with information on the entire process and checkout our library of on-demand ADU webinars & blog posts.