Cost to Replace a Septic System in Tennessee

Replacing a septic system in Tennessee typically costs $8,000-$20,000+, with aerobic systems at the higher end and conventional systems lower.

What drives the cost

• System type. Conventional systems are cheaper. Aerobic systems (needed where the soil doesn’t percolate well) add a treatment unit, pumps and a spray field.
• Soil and percolation. Poor soil requires a larger or more advanced system. Across the ridges and hollows of East Tennessee, what the ground will take can change from one lot to the next.
• Lot conditions. Slope, rock, access and lot size all affect labor.
• Permitting. In Tennessee, permitting through the Tennessee Department of Environment and Conservation (TDEC) and a soil evaluation are part of a compliant install.

Can you avoid a full replacement?

Often, yes. Many systems that seem to be failing only need a repair or drain-field rehabilitation. Replacement is usually only necessary when the drain field has structurally failed. A proper diagnosis first can save you tens of thousands.

Planning a replacement or new build?

We handle soil evaluation, TDEC permitting and installation of both conventional and aerobic systems. See septic system installation & replacement.