Mound Septic System Cost in New Jersey
Estimated 2026 installed range: $12,800 – $28,200
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Open the cost calculatorWhy New Jersey prices differ
Statewide cost drivers here are freeze depth, bedrock and older housing stock. Locally, strict septic rules in many counties require engineered designs. That is why a mound system in New Jersey can land well above or below the national range of $10,000–$22,000.
All system types in New Jersey
| System | Low | High |
|---|---|---|
| Conventional | $4,500 | $10,200 |
| Chamber | $6,400 | $14,100 |
| Aerobic / ATU | $10,200 | $23,000 |
| Mound | $12,800 | $28,200 |
| Sand filter | $10,200 | $20,500 |
What mound systems are for
A mound system raises the drain field above the ground when the water table is high or soil is shallow. It is one of the most expensive common options.