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Septic System Costs in Delaware (2026)

Based on BLS wage data, septic system in Delaware costs an average of $8,697, ranging from $8,632 to $8,747.

Delaware Average $8,697

Septic System Costs by City in Delaware

Wilmington $8,632 Dover $8,714 Newark $8,747

Compare Septic System Costs in Nearby States

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Alex - Founder

Reviewed by

Alex Johnson, P.E.

Mechanical Engineer • 15+ Years Home Repair Experience • Licensed Contractor

All cost data on this page has been verified against BLS and Census Bureau records. See our methodology →

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