SDCI is now reporting new Accessory Dwelling Unit (ADUs) and Detached Accessory Dwelling Unit (DADUs) permits to King County for the purpose of capacity charges. We are required by code and our agreement with King County to report all new sewer connections to King County. Title 28 of the King County Code requires that we report all new units to the King County Wastewater Treatment Division. 
SDCI is now reporting new Accessory Dwelling Unit (ADUs) and Detached Accessory Dwelling Unit (DADUs) permits to King County for the purpose of capacity charges. We are required by code and our agreement with King County to report all new sewer connections to King County. Title 28 of the King County Code requires that we report all new units to the King County Wastewater Treatment Division.
SDCI has changed the application requirements based on this new reporting requirement. During your application process you will need to complete and sign the King County Capacity Charge form acknowledging this change in sewage treatment capacity charges.
For questions about SDCI permitting, send your question through our Building Permit Q&A or Land Use Q&A tools.
For more information about King County sewage treatment capacity charges, please contact King County Wastewater Treatment Division at (206) 296-1450 or email CapChargeEscrow@kingcounty.gov.