Contact the Development Services Office
Development Services Office
The DSO Walk-In Center on the 27th floor of the Seattle Municipal Tower is permanently closed, but we are still open for business! You can contact us during our regular business hours at SPU_DSO@seattle.gov or (206) 684-3333, Monday through Friday, 8 am to 5 pm.
Other questions
Waterline inspections: (206) 684-5803
Billing questions: (206) 684-3000