To install a new septic tank system in your home you have to spend on a
N average $3,918. Most of the homeowners spend between $3,280 and $5,040 for a 1,250-gallon system to supports 3 or 4-bedrooms. A new septic system having two alternating pumps costs $9,571 on average.

A new septic tank system may cost more or less $3,918 to install on average. The prices range from $1,500 to upward of $5,000. Most homeowners have to bear the cost between $3,280 and $5,040 for a 1,250-gallon system to support 3 or 4 bedrooms. Septic system installation that has two alternating pumps costs $9,571 on average and can go up to $15,000.

National Average Cost $3,918
Minimum Cost $1,500
Maximum Cost $15,000
Average Range $3,280 to $5,040

The final cost of a residential septic tank is determined by the conditions of current waste lines and the soil where the septic tank will go. Building a home on raw land not connected to a local municipality waste system can be your best option for sewage treatment.

A traditional septic tank for a 3-bedroom house will cost almost $3,900 to install on average. For conventional systems, the prices start different in different areas. For an engineered system, it will cost you an average of $15,000 for installation.

The size of the tank you should install depends on the home’s size in square feet and the number of bedrooms. Standard septic tank sizes generally start at 750 gallons for one- to two-bedroom houses under 1,500 sqft, and go up to 1,500 gallons for a six-bedroom house that is less than 5,500 sqft.

The description of the costs mentioned above includes excavation with good site conditions, placing of the tank, inlet, and outlet fittings, and backfill after hookup.

For more details: https://r-r-construction.com/septic-construction/residential-septic/