As-builts (Septic System Map)

An as-built is a drawing of your septic system in relation to your house and property boundaries. Your septic system Designer completes the as-built after the septic system is installed. Public Health - Seattle & King County keeps these as-built drawings on file as public information.

You can request Public Health to search their records for your septic system. It is highly recommended to obtain a copy of your as-built for landscaping projects. See Landscaping tips with a septic system for more information.

NOTE: Not all records are complete and older septic systems may not have as-builts.

Three ways to request a file search for an as-built

1. As-built Drawing Request form (PDF)
   Print this form, fill in the details of your request, sign the bottom and mail it or bring it in person to:
   
   Black River Environmental Health
   900 Oakesdale Ave SW
   Renton, WA 98057
   
   
2. Fax your filled-in and signed As-built Drawing Request form to 206-296-4919.
   
   
3. Call the Black River Environmental Health office with the parcel number at 206-296-4932 or 800-325-6165 ext. 6-4932. If you are requesting as-builts for more than one parcel number, please fax or bring the forms to the Black River Environmental Health office in person (see # 1 & 2 above).