Selling a Home With a Septic System
PNW Septic Guide Editorial · Reviewed September 2026
Pump and inspect early
Doing this before you list gives you time to fix small problems instead of negotiating over them.
Gather your paperwork
Permit, as-built, pumping receipts, any repair records and monitoring reports for alternative systems.
Know your county's rules
Some counties in Washington require an inspection at time of sale. Oregon and Idaho requirements vary by county and by system type.
Disclose accurately
Document what you know and what you do not. Buyers and lenders increasingly ask for written septic history.