Septic System Cost - 5 Things You Should Know

When considering a what type of septic system you want or need there are several factors that determine your septic system cost.


  • Type of septic system required. Gravity feed or pump.
  • The number of bedrooms will determine the size of the your dispersal area. The typical house as 4 bedrooms.
  • The materials used to build septic tank. For example poly tank Vs concrete.
  • Your local council septic tank regulations. Council permits vary from state to state.
  • The condition and location of your land. Some areas are more difficult to access and excavate.

There could other factors that affect the cost of your Septic System

  • Sand Filter. Does your location or council regulations mean that you will need a sand filter for secondary treatment.
  • Retrofit your existing septic tank. We can retrofit 80% – 90% of existing septic tanks.


Septic System Cost for Domestic or Rural

The cost to supply and install our Eco-Friendly Septic Tank System for an average 4 bedroom home ranges between $10,000 and $15,000.

We will come out to service your system after it has been operating for 6 months.


Ongoing Costs:

  • There are no ongoing service contracts.
  • Your system does not require desludging every 3-5 years.
  • A 4 bedroom house will cost you $20 pa.

Septic System Cost

Septic System Cost with a Sand Filter

The cost to supply and install a Septic System with a Sand Filter for an average 4 bedroom home ranges between $15,000 and $20,000.

We will come out to service your system after it has been operating for 6 months.


Ongoing Costs:

  • There are no ongoing service contracts.
  • Your system does not require desludging every 3-5 years.
  • A 4 bedroom house will cost you $20 pa.

Septic System Cost

Cost of a Commercial Septic System

The cost to supply and install a Commercial Septic System will vary considerable. Many factors will determine the cost however most commercial systems start at $25,000.

We will come out to service your system after it has been operating for 6 months.


Ongoing Costs:

  • There are no ongoing service contracts.
  • Your system does not require desludging every 3-5 years.

Commercial Septic System Cost

Read what our clients have to say

5 Things Determine Septic System Cost Overall rating: 4.8 out of 5 based on 30 reviews.

Just installed

5 5 1
We just had our system installed a few weeks ago. I would really like to thank everyone at Worm Farm Waste Systems for their professionalism throughout the whole process. You basically sorted out all our issues with council which was a real blessing. Totally recommend you guys. Thanks again for everything.

The Smart Choice

5 5 1
We've had our system for over 2 years now and it's been the smart choice of the septic systems we looked at. The running costs have been minimal and its needed no maintenance. It's been excellent using the system day to day including the disposal of our organic waste. Big plus for the environment as well. Highly recommend this septic tank system to anyone. NSW Central Coast.

Totally Agree

5 5 1
I totally agree with Gill from Vic. The worm farm waste system is absolutely fantastic. Its been running without a hitch for the last 4 years and garden looks great. For anyone considering a septic system please take the time to look at this one. You will not be disappointed.

It just looks after itself!

5 5 1
We have this system for our house in NE Vic - family of four, plenty of visitors, two toilets and bathrooms and washing machine/dishwasher running most days. There is nothing different inside the house, and the unit sits outside the house and just runs itself. Occasionally we throw in a dead rabbit and green compost from the garden. I can't understand why anyone would want a septic system with regular maintenance costs, when this has none and is eco friendly as well. The company dealt with our local council for the permit with no problems. It has definitely been the way to go for us.

Existing Client

5 5 1
I am an existing client with A & A Worm Farm Waste System and have been for 8 years. I cannot agree with the review posted by Julie C on so many fronts. Our experience during the entire permit process, co ordinating the installation and after sales service has been very impressive. After 8 years we have never had a problem with the system, appreciate the fact all our food waste & organic matter are able to be disposed into the system with our garden benefiting from the beautiful worm liquid. Any time we have asked a question the response has been very professional and helpful. We have recommended this system to all our friends and neighbors The internet is a marvellous tool however can be used in such a negative way by competitors

System installed last week

5 5 1
We had the new system installed last week, but our house is not finished yet so i cant review the system itself. However the service and installation was fantastic, we have a bit of a difficult block, and with some tree issues we had to rethink some of the trenching onsite at the time. This was no issue for Peter who took it all in his stride. He went to great efforts to get it all installed (which was over 3 days due to our difficult terrain). Liz in the office offered great communication and always ensured we knew when Peter was coming. Looking forward to seeing how the actual system performs

Contact Us Today For A Free Quote

  • If your council is not shown in the list provided please use "N/S". Then add your council in the comments section. Thank you.
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We will respond to you inquiry within 24hrs during normal business hours.

21 Reasons Why People Choose Our System

  • 21 Years in the wastewater industry (since 1996)
  • Single chamber with low site impact
  • Low running costs. $20 per year based on a 4 bedroom house
  • Our pumps are very quite & only activated by demand
  • No terrible smells
  • 20 times faster than septic or aerated systems in processing sewage solids
  • 10 Year System Warranty

Did we mention NO Service Contracts

  • Thousands of systems installed
  • Residential, Commercial & Rural Systems
  • Approved in VIC, NSW, SA, QLD & NT
  • We help with Council Permit Applications
  • Company employed installers are used to install your system
  • Can reduce household organic waste by up to 90%
  • Many effluent dispersal options
  • We can retrofit existing septic or aerated systems
  • Aerobic system driven by a wind driven ventilator
  • Natural liquid fertiliser is added to you soil
  • Environmentally friendly and sustainable
  • Suitable for all climates – Alpine and Tropical areas
  • Weed control – Dispose of ragwort, dock, thistle

Do You Know Your Septic Tank Regulations

Onsite wastewater management systems (Septic Tank Systems) are used on residential, community, rural and commercial premises. In each state of Australia the regulations for a onsite wastewater treatment can be very different.

That’s why we have added all the councils we have dealt with since 1996 with links to help you understand your local council septic tank regulations. Your local council will also be able to assist when it comes to understanding your septic system cost.


Finalist 2017 HIA Greensmart Awards

Our septic tank systems provide cost effective and sustainable living

Domestic | Commercial | Rural

We design site specific septic tank systems and assist with council permits

Eco-Friendly Septic Tank System 

Our wastewater treatment plant converts sewage and organic waste using the humble worm

Our Partners

Organic Growing With Worms
Green Homes Australia
Bungendore Rural Services

Latest from our Blog

About The Frog

We use the frog as a mascot on our website, brochures and vehicles because they are excellent indicators of local environmental health. Frogs disappear when the environment is under stress and return when conditions improve.

It is not unusual to find frogs living happily in our Eco-Friendly Septic Tank Systems and as they die in polluted water. What better proof is there of how healthy the environment becomes when you install one of our systems.   

Worm Farm Waste Systems