GroundRosterSeptic Inspection: Licensed Septic Inspectors Based in Mount Vernon, WA
3 of the 6 licensed listings based in Mount Vernon hold a Washington license class that covers this work: they are licensed to inspect existing septic systems; the license class you want for a home-purchase inspection. Not every well and septic professional is; see all Mount Vernon listings for the full roster.
"Based in" is the city on the business's state license record. That can be a mailing address; it doesn't tell you where the business works.
What does septic inspection cost?
A septic inspection usually costs $150 to $900. The low end is a visual check of the tank and drainfield; the high end opens and pumps the tank as part of the inspection, which is what most buyers should ask for.
Do I need a septic inspection when buying a house?
If the property is on a septic system: yes, strongly recommended, and your lender may require it, so ask your loan officer. The inspection covers the tank, baffles, drainfield, and permit history. Schedule it early in your option period; a failed system is a five-figure negotiation item.
Before you hire
Confirm the license number on this page is still active with Washington, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.