To help more residents own and rent accessory dwelling units (ADUs), the City is currently seeking submissions of designs for detached ADUs, often called DADUs or backyard cottages. Pre-approved designs will offer a faster, easier, and more predictable path to permit and construct a DADU. Homeowners choosing a pre-approved plan will pay reduced permit fees and get their permit within 2-6 weeks for sites without protected trees or environmentally critical areas and that do not need drainage review.
The latest edition of Seattle Public Utilities’ (SPU’s) Design Standards and Guidelines (DSG) is now published online. The DSG provides engineering requirements, details, specifications, policies, and procedures for designing SPU infrastructures.