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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.

Are you interested in Septic System Cost? This article is designed to guide you through all the costs associated with Septic Systems.

If your home or building is not connected to the municipal sewage plant, you need a domestic water treatment plant to clean and dispose of your wastewater. This is often the case for homes in rural areas. There are several types of wastewater treatment systems for homes to choose from, but they all basically perform the same function; they remove waste from your home, filter and treat it, and finally dispose of it.

A quick Google search will give you price estimates varying from $13,000 to $26,000 for advanced treatment septic systems. However, they can be more if the system is larger than normal or in the case of very difficult site conditions. There are many factors that determine the final septic system cost; including your septic system type and location. In this article, we will deep dive into what determines how much you pay for your septic system.

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 Type

Septic System Cost for Septic Tanks Installation by NexGen SepticsThe 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:

  1. 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.
  2. 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 Type

Rocky 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 Field

The 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 Pipes

Regardless of the septic systems you use, pipes are used to convey your sewage from your home into your septic tank, and they also convey the effluent from the septic tank to the leach field. The septic system you install, the distance of the septic tank from the house, and the distance of the leach field from the septic tank all determine how much pipe you need. You can purchase 100 feet of four-inch perforated PVC piping from $65 to $80.

Septic Tank Costs for Septic System Design

Septic System Permit Costs

You need to obtain a permit from your local authorities to construct a septic system. When applying, prepare a site plan which usually includes a scale diagram of your property which shows your house, outdoor elements, and septic system location. The construction will be inspected before and after completion and permits may take up to two weeks secure. Costs vary from $250 to $450.

Septic System Engineering (Design and Installation)

An experienced septic system engineer will use the results from your soil test to design a suitable septic system for your home. A septic contractor uses the design to construct a septic system that is effective, durable and abides by any local regulations. You can contact septic companies near you for a quote to design your septic system.

Septic System Maintenance Cost

Regular maintenance ensures that your installed septic system does not fail over time. You should get septic system inspections and periodically pump the system at least once every three years to remove sludge and floating scum buildup. Regular maintenance keeps your septic system in good working condition so it can serve you longer. Pumping costs range from $300 to $500 and septic system inspection may cost $260 to $420.

Septic System Installation Cost

Septic system installation costs vary depending on the location, soil type, septic system type, and equipment and labor costs. Even if you would like to build your system yourself, we recommend you seek advice from experts like NextGen Septics as flawed septic system design or installation can be costly in the future.


Septic Tank Cost Guide

The 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 Types

There are three commonly used septic tanks types to choose from:

  1. Plastic Septic TanksSeptic System Costs for 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.
  2. 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.
  3. 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.

Septic Tank Riser

Septic tank risers allow ground-level access into your installed septic tank, making it easier and less costly to maintain the septic tank. Like septic tanks, risers can be made from plastic or concrete. New septic tanks often come with their own risers, but they can be installed on old tanks as well. Concrete risers are cheaper because they are cumbersome and cost about $100. Plastic risers are lighter and cost about $200.