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.