Search on-site sewage/septic system records

Search for your septic records using this tool: kingcounty.gov/SepticRecords

What records are available?

Records are available for both new construction and repairs to failing systems. Approved on-site sewage/septic system site design applications submitted online since May 2019 are also available.

Why can't I find my record?

Online records are not available if:

• The home was built before the early 1970s.
• The on-site sewage/septic system was installed without a permit.
• The on-site sewage/septic system designer did not submit final construction documents to Public Health.
• The property address or parcel number has changed. Some addresses have changed, especially within areas incorporated into cities recently. Some parcels have been re-platted since the original documents were submitted. In these cases, it is helpful to search with the original house address. 
• Record drawings may be in our microfiche files but not yet scanned into the electronic database. You may wish to contact the septic system designer or engineer for a copy.
• Many pre-1998 records are available but may not be as accurate, legible, or as detailed as recent record drawings.