Translate
Resources for homeowners and residents on septic
Septic maintenance
Maintaining your septic system
Tips and resources to help you maintain your sewage/septic system.
Professionals who can help
Find information for professionals to work on your on-site sewage/septic system.
Search septic system as-built drawing records
Online database with King County's official records.
Educational septic system downloads
Resources to download and/ or print about septic systems.
Septic install, repair, replacement
Property sales and transfers
Learn considerations when buying or selling a property with a septic system.
New on-site sewage design and installation
Learn about the permitting process for new on-site sewage systems.
On-site sewage/septic system repair and replacement
A step-by-step guide for septic system repairs based on the permit you need.
Permitting for house or building remodels or expansions
Find the permitting steps for your remodels or expansions on septic systems.
Permitting for subdivisions and boundary line adjustments
Find the steps for permitting a subdivision or boundary line adjustment associated with a septic system.
Resources to understand septic to sewer conversions
Find resources about septic systems in urban areas.
Financial and legal resources
Financial assistance
Learn more about loans or grants for on-site sewage systems.
Sewage/septic health codes
Find information related to health codes from King County and Washington State Boards of Health.
Sewage/septic program fees
See fees for septic program services.