OSS records
As-built record drawings - search utility
Most of the on-site sewage system (OSS) record drawings, also known as as-builts, dating from 1998 are available online. The record drawings include both new construction and repairs to failing systems. Many older records are available but may not be as accurate, legible, or detailed as recent record drawings, as regulations have become more prescriptive. Updated record drawings/site sketches submitted with a Time of Sale inspection report may also be found on Online RME under Application History.
Search utility to find King County parcel information. You can search by address, search by parcel number, or you can just zoom in on the map and click on a parcel.
View King County spatial information (GIS data and images) in an interactive map display. You can customize your map display to show just the information you want to see at the best scale for your chosen purpose.
Online database of King County's official records.
Research operation and maintenance records by address or parcel number. Make sure to choose King County before searching. Updated record drawings/site sketches may be found attached to the Time of Sale Inspection Reports under Application History.
Link/share our site at www.kingcounty.gov/ossrecords