The Lilly’s Septic Team holds ALL King County Certifications and licensing to perform all Septic System Inspection, Pumping & Repair services required to sell your home in King County.
Every property that is serviced by an OnSite Septic System or OSS in King County & Pierce County must be Pumped and Inspected when the property is transferred.
The following information and links will help you prepare to sell a home in either King or Pierce County, Washington.
Home Sales and transfers of properties with septic systems in King County
Public Health- Seattle & King County requires all sellers of properties with onsite sewage systems (Septic Tank & Drainfield System) to have their on-site Septic System inspected by a King County licensed On-Site System Maintainer (OSM). The Septic Inspection must be completed and a copy of the report must be given to both the buyer and Public Health before the transfer of title. The OSM must submit the property transfer report to King County environmental health through the Online RME portal. King Counties new reporting & public record system
King County OSS Septic System Inspection filing fee $225 This fee will be included on the service invoice and is collected by your O&M Professional from the homeowner (or whoever is paying) and paid directly to King County – This is not a fee charged by Lilly’s Septic, this is a KC fee…… but we must have the funds prior to submitting the O & M Sale Inspection Certification paperwork.
Before closing, the seller must record a Notice of On-site Sewage System Operation and Maintenance Requirements (OSSM)* at the King County Recorders Office. This is a document that acknowledges the property is served by a septic system and describes the owner’s responsibilities for maintaining the system. The seller gives a copy of the recorded OSM to the buyer prior to closing. A declaration of receipt of the recorded OSM should be signed by the seller and buyer for their records (King County does not need a copy of this declaration of receipt).
*OSM – is also known as Form 22U by the Northwest Multiple Listing Service
AS-BUILT drawing Services
An As-Built drawing is a diagram of the septic system and shows where the septic tank, Pump Tank (if there is one), the D-Box and drainfield lines are located as well as any other buildings such as sheds, garages, pools, etc on the property. King County requires that an As-Built is submitted with the OSS Inspection paperwork – If KC does not have an as-built on file that can be submitted, then Lilly’s Master Installer | Professional OSM’s must draw a Certified scale as-built drawing to be turned into KC with the Septic Inspection paperwork. Fee applies and will be quoted (if necessary) at time of booking.
If nothing is on file… then request a copy of your as-built by calling the health department directly at 206-477-8050. OR Lilly’s septic (OSSM) Inspection coordinator will obtain the As-Built via email (If one is available in the paper archives) from KC Health Dept for no charge after booking your Inspection appointment. If there is no as-built available, the county will require Lilly’s O&M Inspector to draw a certified As-Built to submit with the inspection paperwork.
Our Certifications & Licensing
- MI 172 – McCullough, Darren
- KC 106 – Lilly’s Septic Service | Northwest Septic Service
- OSM 64 – McCullough, Darren
- OSM 162 – Baker, Nathan
Lilly’s Septic Service can provide your Septic Tank Pumping & Real Estate sale Inspection service all in one convenient appointment to sell your home in King County.
Serving King & Pierce County including: Maple Valley, Ravensdale, Hobart, Enumclaw, Black Diamond, Covington, Issaquah, Sammamish, Kent, Auburn, Renton, Federal Way, SeaTac, Edgewood, Tukwilla, Seattle, Snoqualmie, North Bend, Fall City, Preston, Carnation, Woodinville, Redmond, Duvall, Kirkland, Bellevue, Clyde Hill, Medina, Mercer Island – Greenwater, Buckley, Bonney Lake, Lake Tapps, Puyallup