Factors That Determine Septic Installation Costs

Posted on: 13 December 2019

If you are preparing for the installation of a septic system, then the cost of the installation is likely to be one of the top things in your mind. The cost of the installation varies with the following factors.

Tank Material

The septic tank is the part of the system that holds the waste during treatment. The tank can be made from different materials with the most common ones being concrete, metal, plastic, and fiberglass. The type of material affects the overall price. For example, plastic tanks are relatively inexpensive compared to other materials.  

System Capacity

The capacity of the system is the volume of waste it can handle on a regular basis. The system capacity depends on various factors such as the number of people in the household, the water habits of the household, and the nature of the soil in the drain field, among other issues. It makes sense for installation costs to increase with capacity since high-capacity systems require more materials, involve more excavation, and require more labor than low-capacity systems.


You will require some local government permits to install your septic system. The government has to ensure that the installation is safe and not a danger to the public or the environment. The cost of the permits depends on your location.

Type of System

Septic systems come in various types. At the basic level, there are systems that rely on gravity to get waste out of the tank onto the drain field and those that use a pump to drive out the waste. The inclusion of the pump increases the installation cost. These systems also vary on how they treat their wastes. For example, there are aerobic (require oxygen) and anaerobic (doesn't require oxygen) systems with the anaerobic systems requiring lower installation costs than the aerobic systems.

Excavation and Landscaping

Lastly, you will also require some excavation and installation during and after the installation of the septic system. Apart from the system's capacity, the nature of the topography and soils will determine the cost of the excavation. The number and nature of trees on the installation site and the required landscaping will also affect the landscaping costs.

Ensure that your septic system is professionally installed by not basing your choice of contractor solely on cost. Get an experienced professional to give you quality residential septic service so that your septic system can serve you for a long time without constant breakdowns.