Buying a house with a septic tank

Ask for the system records

• Which system serves the property, where is it and where does it discharge?
• Does it serve other properties, and who pays for maintenance and repairs?
• Ask for plans, manufacturer instructions, maintenance reports and emptying records.
• Ask for the relevant regulator consent, registration, permit or explanation of the applicable England rules.

England: information for the new operator

For England’s ground-discharge guidance, the seller must tell the new operator in writing that a sewage discharge is in place. The guide specifies the description, locations, changes and available maintenance information to include.

England: the specific watercourse issue

Where a septic tank discharges directly to a watercourse, EA guidance says buyer and seller should agree responsibility for upgrading or replacement as a condition of sale. This is not a statement that every septic tank must be replaced whenever a house is sold.

Commission an appropriate inspection

• Ask an independent drainage professional what its survey includes and excludes.
• Ask whether the tank, outlet and drainage field can be assessed, and what cannot be established without further investigation.
• Ask for a written report distinguishing observed condition from assumptions.
• Give the report to your solicitor to discuss land rights, shared responsibilities and any proposed contract terms.
• For Scotland, Wales or Northern Ireland, ask the regulator about the existing authorisation and any ownership-change requirements; do not transfer England’s process by assumption.