Seattle.gov Home Page
Link to Seattle Department of Construction & Inspections home page

SDCI Closures, Service Updates, and Inspection Requirements

SDCI customer service areas remain closed until further notice and continue offering services online. King County has approval from the State Department of Health to allow all private construction activities that are low-risk and adhere to strict COVID 19 Job site Requirements. The City of Seattle has issued requirements for construction projects seeking inspections. The City WILL NOT INSPECT any site that does not follow these requirements.

Tips

Summary: This Tip explains how to establish a Detached Accessory Dwelling Unit (DADU), also known as a backyard cottage, or mother-in-law unit. A DADU is a type of accessory dwelling unit consisting of a room or set of rooms designed and established by permit to be a separate dwelling unit. DADUs share a lot with a single-family home in SF5000, SF7200, and SF9600 zones, any principal unit in an RSL zone, or with a single-family home, rowhouse or townhouse in a lowrise zone.

Date Revised: 08/13/2019

See all Tips