Question: how much does it cost to put down a septic tank?
Answer: Septic Tank Installation Cost Septic tanks cost between $3,115 and $9,614, or $6,221 on average. A typical 1,000-gallon tank, great for a 3-bedroom home, can range from $2,100 to $5,000, including the price of the tank itself, between $600 and $1,000.