Traditional white cottage with a thatched roof and landscaped front garden.

Home Seller off-mains drainage surveys

Selling a property with a septic tank, sewage treatment plant or other off-mains drainage system? A specialist survey can help you understand its condition and compliance before buyers start raising questions.

WES inspects the existing arrangement and reports on what is in place, how it is functioning and whether anything may need attention before the sale progresses.

Know where you stand before buyers start asking

A Home Seller survey gives you a clearer picture of the off-mains drainage serving the property and flags anything that may need further investigation or attention.

The system

What type of off-mains system serves the property and how it is arranged.

Its condition

Visible defects, deterioration or other concerns that may need further attention.

Compliance

How the existing system and discharge arrangement appear against current requirements.

Potential next steps

Guidance on further investigation, repairs or upgrades where something needs attention.

If something needs putting right, WES can also advise on the appropriate remedial route.

Explore Replacing or Upgrading →

WHY DO IT EARLY?

Get ahead of questions before they become delays

Off-mains drainage can become an issue later in a property transaction if the existing system hasn’t been properly assessed.

Arranging a specialist survey early gives you time to understand what is in place and deal with any concerns before they become part of the later sales process.

Buying & Selling overview →

Get the drainage checked early in the sale

Why does timing matter when selling a property with off-mains drainage? In this short Q&A, Mark Ward explains why arranging a survey early — ideally before the property is marketed — can help identify any compliance issues before they become a problem later in the transaction.

Starting the process early gives you more time to understand any findings, deal with remedial work or approvals if needed, and reduce the risk of unexpected delays once a buyer and chain are in place.