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Replacement Costs. Although costs vary according to the size of the leach field, soils and costs of local permits, expect to pay between $5,000 and $20,000 for leach field replacement.It is the most expensive component of the septic system.eplacement Costs. Although costs vary according to the size of the leach field, soils and costs of local permits, expect to pay between $5,000 and $20,000 for leach field replacement.
a cluster system where each home has their own septic tank but empty into a community drainfield will generally cost $ 5000 to $ 8000 for the initial install engineered systems like mounds sand peat filters aerobic systems and constructed wetlands will run $ 6000 to $ 10000