Septic System Cost
The NexGen Septic System Cost Guide covers prices for Leach Field, Septic Tanks, Pipes, Permits, Engineering Design, Installation, Maintenance Costs in California.
*Septics Quote does not include septic installation cost, septic engineering, sand, perc test, site evaluation, misc piping, permits, etc.
Septic System Cost Guide
- Septic System Type
- Soil Type
- Leach Field
- Septic Tank
- Septic Tank Riser
- Septic Pipes
- Permit Costs
- Septic System Engineering (Design and Installation)
- Maintenance Costs
Septic System TypeThe type of septic system you choose determines the cost, effluent treatment mechanism, and leach field size you need for your installation. There are mainly two types of septic systems:
- Anaerobic Septic System These are conventional and simple septic systems that use anaerobic bacteria to decompose waste in a septic tank. Pipes are used to convey the waste from the home to the septic tank and from the tank to the leach field. The system is relatively cheap and installation can cost between $2,000 to $5,000.
- Aerobic Septic System Aerobic septic systems use aerobic bacteria to decompose the waste inside the septic tank. Oxygen is needed in the septic tank to expedite the process and it can be supplied through a timer and a motor. The effluent is better treated and the wastewater released is clean enough to use for irrigation. The system also needs only half the leach field size you would need for anaerobic septic systems. Homeowners pay $13,000 to $26,000 for aerobic systems.
Soil TypeRocky soil or extensive tree roots increase the preparation time for your onsite wastewater treatment system and will add to labor costs. Before installation commences, an engineer may need to test your soil to reveal the type and arrangement of the underlying soil. The test may be needed to obtain approval for your leach field. Site preparation cost range from $1,000 to $4,500 while soil tests can cost from $100 to $400.
Leach FieldThe leach field is used to release the treated water back into the soil. The best leach fields are sandy soils or filled with gravel. Heavy clay soils or soils with high seasonal water tables are not suitable for use as leach fields because they do not absorb water properly. Preparing your leach field may cost between $2,000 to $10,000.
Septic Tank CostsThe cost of the septic tank depends on the size and type of tank used. An 800-gallon septic tank would be suitable for a two-bedroom house since there will be less daily wastewater than say a four-bedroom house which might require a 1200-gallon tank.
Septic Tank TypesThere are three commonly used septic tanks types to choose from:
- Plastic Septic Tanks Polyethylene septic tanks are the cheapest and easiest tanks to install due to their lightweight. However, they may crack or break under pressure and are not allowed in all states. They cost between $1,100 for a 1000-gallon tank to $2,100 for a 1,500-gallon tank.
- Fiberglass Septic Tanks Fiberglass septic tanks are also light and easy to install. They are non-porous so they have lesser algae growth. Unlike concrete septic tanks, they neither contract nor expand, so they do not develop cracks. They cost between $1,600 for a 1000-gallon tank to $2,000 for a 1,500-gallon tank.
- Concrete Septic Tanks Concrete septic tanks are highly durable and can last up to 30 years if well-constructed and properly maintained. They are also the most commonly used tanks with a cost ranging from $1,200 for a 1,000-gallon tank to $1,800 for a 1,500-gallon tank.