Septic system repair cost varies enormously depending on whether the problem is the tank, the drain field, or something in between — and that distinction should be clear before you approve major work.
What to look for
- An actual inspection finding, ideally with a camera or dye test, rather than a repair recommendation based on assumption.
- Tank pumping versus drain field repair — these are very different costs, and pumping should always be tried first if it hasn't been done recently.
- Permit, which most areas require for septic system work.
- Well water testing, if you're on a private well, should be independent of whoever is proposing treatment equipment.