Mound Septic System Cost in Massachusetts
Estimated 2026 installed range: $13,200 – $29,000
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Open the cost calculatorWhy Massachusetts prices differ
Statewide cost drivers here are freeze depth, bedrock and older housing stock. Locally, Title 5 requires engineering design in many towns. That is why a mound system in Massachusetts can land well above or below the national range of $10,000–$22,000.
All system types in Massachusetts
| System | Low | High |
|---|---|---|
| Conventional | $4,600 | $10,600 |
| Chamber | $6,600 | $14,500 |
| Aerobic / ATU | $10,600 | $23,800 |
| Mound | $13,200 | $29,000 |
| Sand filter | $10,600 | $21,100 |
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.