Honest, wide ranges — because septic pricing is hyperlocal. Estimates only, not a quote.
Conventional: $3,900–$12,000 installed. Mound: $10,000–$25,000. Aerobic: $5,000–$20,000 (up to $40k+ on difficult sites). Drip: $8,000–$18,000 (up to $35k+).
A 1,000-gallon concrete tank is roughly $900–$1,400 before labor. Installed tank-only replacement runs $3,000–$10,000.
Different soil, different allowed system, different county permit fees. Two lots a mile apart can need completely different systems.
In most jurisdictions it's illegal without a license, and failed systems bring fines and contamination liability. Get quotes from licensed installers.
Soil and percolation testing runs roughly $750–$1,900, usually billed before anyone will quote you an install price.
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