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.
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 System) to have their on-site Septic Tank System inspected by a King County licensed On-Site System Maintainer (OSM). The 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 use the King County reporting forms when submitting the inspection report packet to Public Health
King County OSS Septic System Inspection filing fee $105.00 This fee is collected by your O&M Professional (check made out to PHSKC Health) 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.
Find out more about Sales in King County: King County Real Estate Sale Inspection page
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 - An As-Built drawing is a map of the septic system and shows where the septic tank, Pump Tank (if there is one), the D-Box and drainfield lines are located 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 Lilly’s Master Installer – Professional OSM must draw a Certified scale as-built drawing to be turned into KC with the paperwork. fee applies and will be quoted (if necessary) at time of booking.
To check if there is an As-Built on file at the KC Health Dept. drive to KC health dept in Eastgate (Bellevue) and request a copy of your as-built OR Lilly’s septic (OSSM) Inspection coordinator will obtain the As-Built via fax from KC Health Dept for no charge after booking your Inspection appointment.
Down-loadable Adobe format King County Forms:
- Notice of On-site Sewage System Operation and Maintenance Requirements (OSSM)
- Information Sheet for OSSM (where to record, what to do with copies, etc.)
- Sample copy of Buyer’s Declaration of Receipt of Copy Of Notice of On-site Sewage System Operation and Maintenance Requirements (OSSM) - SAMPLE ONLY!
Lilly’s Septic Tank Services provides:
- Septic Tank Pumping & Cleaning
- Real Estate Sale Inspections
- Septic System Installation & Repair
- Septic System Repairs
- Drainfield Repairs
- Drawing of Certified As-Builts
- Pump Alarm Calls & Replacement
- King county Repair Proposals
- Baffle & Riser Installation
Our Certifications & Licensing listed below for your reference:
- MI 172 – McCullough, Darren
- KC 106 – McCullough, Darren / Lilly’s Septic Tank Service
- OSM 064 – McCullough, Darren
Lilly’s Septic System Service can provide your Septic Tank Pumping & Inspection service all in one convenient appointment to sell your home in King County.
(425) 432-3084 * (253) 639-3606 * (360) 825-4809
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, Tacoma