Building Permits

Septic Tank System Permits

Septic tank systems store wastewater, which is mainly contaminated by toilet waste. 
If you want to install a new septic tank system or alter an existing one, you need to complete a Septic Tank System Permit Application (PDF 411kb).
There are strict guidelines which must be followed.

Please note: this is not an application for a greywater (non-toilet) system.

For all enquiries about permits to install or alter greywater systems, please contact our Environmental Health team on 1300 BCOAST (226 278) or (03) 5671 2211.

When is a permit to install or alter a septic tank required?  

Septic tanks fall into two categories, those producing less than 5,000 litres per day and those producing more than 5,000 litres per day. Most houses and many small businesses produce less than 5,000 litres per day and therefore need a Council permit. Larger premises (eg, restaurants) which produce more than 5,000 litres per day must deal with the Environment Protection Authority, not Council.

Already have a sewerage connection to your property?

If there are sewerage connections to your property you will not be allowed to install a new septic tank. You will need to contact the local water authority for your area to lodge your request to be connected to the sewerage system.

Altering or just maintaining?

A septic tank system includes all drainage for the premises. If your alteration work will affect the flow, function or capacity of the system, a  permit will be needed. However, if the work involves only maintenance, and will not change the system’s flow, function or capacity (eg, replacing a fixture), a permit is not necessary.

Land Capability Assessment

Unsewered allotments in a built up residential area, or subdivisions with allotments with an area less than 4,050m2 may require a Land Capability Assessment unless this condition is waived by the Environmental Health Officer.

Need to know more?

For more details on the information you will be required to submit with your application, or details of Land Capability Assessments and assessors, please contact our Environmental Health Team on 1300 BCOAST (226 278) or (03) 5671 2211.

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