Septic Inspection When Buying a House
A septic system can be one of the most expensive parts of a rural home to fix, and a general home inspection usually doesn't evaluate it in depth. Get a dedicated septic inspection before you close.
Some states require it
- Iowa requires a Time of Transfer inspection by a DNR-certified inspector before most sales of properties with private sewage systems.
- Massachusetts requires a Title 5 inspection at or within two years before most transfers.
- In Minnesota, many counties set their own transfer inspection rules.
Elsewhere, it's often up to the buyer. Check your county health department either way.
What a thorough inspection looks at
Iowa's Time of Transfer rules are a good model. Inspectors gather records, verify or create as-built drawings, inspect tanks, pumps and secondary treatment, and do a hydraulic loading test.
Buyer tips
- Ask the seller for pumping and repair records
- Make your offer contingent on a satisfactory septic inspection
- Ask for the tank to be pumped as part of the inspection so the inspector can see inside
- If there's a well, test the water too (see our buyer checklist)
Frequently asked questions
Does a home inspection include the septic system?
Usually not in depth. Hire a septic inspector, and in Iowa it must be a DNR-certified Time of Transfer inspector.
Which states require septic inspection at sale?
Among the states we've verified, Iowa and Massachusetts require it statewide for most transfers. Requirements change, so confirm with your state agency.
Sources
Last checked: October 21, 2026