That’s the number one question we get asked! But the final price for a septic tank system is never a fixed number.
You need to factor in everything from the system type you want to the mandatory local council approval fees.
At Express Wastewater Solutions, we’ll give you the full, transparent cost breakdown you need before starting your project.

When you get a quote for a septic system, remember the final price includes much more than just the tank itself.
The total installation cost breaks down into two major components that change with every property:
The price of the septic tank depends on the size required for your household (based on the number of bedrooms) and the material you choose (such as concrete or durable poly).
This is the most variable cost. It includes the required excavation (digging), plumbing connections, and necessary earthworks.
Factors like hard rock beneath the soil or difficult access can significantly impact the final installation cost.
Beyond the physical system, you must always budget for mandatory regulatory costs.
Installing a septic system means you need proper council permits and inspections before and after the work.
These compliance costs are non-negotiable and vary depending on the local council region and the complexity of your septic system design.
Our team at Express Wastewater Solutions manages all the necessary paperwork and liaisons with the council, ensuring your new system meets every local regulation without the hassle.

That's a very specific question. The price of aseptic tank increases directly with its capacity, which is calculated based on the number of bedrooms in your home (due to regulatory requirements).
The cost is driven by the material (concrete is typically more expensive than poly) and the physical size of the unit.
Here is a rough guide for the cost of the septic tank unit itself (excluding installation, which is a separate major cost):
The price of a septic system also includes mandatory long term costs.
You must budget for routine septic system servicing, which includes mandatory compliance checks and reporting to the local council.
These routine checks are a small, preventative cost that saves you a fortune by avoiding system failures, emergency pump outs, and costly repairsdown the road.
Our team manages your full maintenance schedule to keep your operating costs low and your system running efficiently.

The final septic system cost depends on several factors, and the size of the septic tank is only one part of the equation. We provide expert advice on installation and maintenance costs for commercial systems and homes, tailored to your specific requirements.
At Express Wastewater, we pride ourselves on matching the right system with the right person that can save up to and over $15,000.
Call Express Wastewater today with any questions you have on Express Wastewater a call at 1300 770 594 and we would be happy to assist in every way we can.
Resources:
The Best Brisbane - Septic Tank Cost in Brisbane
Biocycle QLD - Wastewater Treatment System Pricing: Understanding Costs for Septic Tanks, Service, and Maintenance
Point - Breaking down expenses: How much does a septic system cost?