How much does drain field replacement cost in Litchfield County?
Last updated July 18, 2026
Short answer
Drain field (leach field) replacement in Litchfield County runs $8,000 to $20,000, depending on size, soil, and system type.
The drain field is the most expensive part of a septic system to replace. Cost tracks the size of your tank and home, the soil, and how much excavation the site needs. Litchfield County's rocky, poorly-draining hill soil often requires a sand filter or engineered field, which pushes toward the high end. A failed field usually shows up as wet spots, slow drains, or backups. Replacing a field while keeping a good tank is a middle option that can save several thousand over a full system.