How much does it cost to replace both the septic tank and drain field in Litchfield County?
Last updated July 18, 2026
Short answer
Replacing both the tank and drain field in Litchfield County typically costs $15,000 to $32,000 — essentially a full system replacement.
When both the tank and field have failed, the job is close to installing a brand-new system. The price covers a new tank, a new drain field, excavation, removal of the old system, permits, and design. Replacement often triggers a code upgrade — a larger tank or more field area than the original — which adds cost. The hilly terrain and poor soil common in Litchfield County can force an engineered system at the top of the range. Get two or three bids; the spread on a job this size can top $5,000.