Apply to install or alter a septic system | City of Casey
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Apply to install or alter a septic system

Choose the right septic system for your property

You should choose a septic system suitable for your property and surrounding area. Find out more on the different types of septic systems available.

You should have a qualified onsite wastewater consultant asses your property before you apply to install or alter your septic system.

To find out how you can have your property assessed and which system is most suitable to you:

  • contact us
  • contact a qualified onsite wastewater consultant

Things you will need before you apply

Arrange land capability assessment

Your property will need an assessment done by a qualified land capability assessor. Unless Council advises it is not required, an assessor will prepare a report. The report will check the capacity of your land to absorb treated wastewater onsite.

A land capability assessor is a qualified soil scientist and/or hydrogeologist. Council does not endorse one qualified consultant over another. A land capability assessment consultant can be found by a web search engine.

Further information on land capability assessments can be found on EPA Victoria’s website.

Provide a site plan

You must provide a site plan with your application form. Your site plan must show:

  • The proposed dwelling and ancillary buildings/structures
  • Septic system location
  • Disposal area
  • Nearby waterbodies and retarding basins

Provide a floor plan

You must also provide a floor plan of the dwelling including existing floor plan/new floor plan for dwelling additions.

Fees

  • Install a new septic system: $635
  • Alter an existing septic system: $635
  • Minor alterations to an existing system: $225

How to apply

To apply for a permit to install or alter a septic system, you or your plumber must complete and provide:

​​​​​For more information on the application process, please read our Applying to Install or Alter a Septic System document.

Submit the documents and payment:

What happens next?

  • Once we have received the required documentation and the fee has been paid, we will assess your application.
  • We will contact you within 5 business days to inform you of the outcome of the application. If we require further information, or need you to alter your plans, we will advise at this time.

Before you can use your septic system

Before you can use your system:

  • You must provide us with a certificate of compliance and 'as-laid' plan from your plumber that ensures all works comply with relevant standards and regulations.
  • We will conduct a final inspection of the installation to make sure it meets the criteria of the permit.
  • If your system passes the inspection, we will issue a permit to use the system. You can then begin to use your septic system.
  • You should make sure you maintain your system to avoid having the system fail and be in non-compliance with your permit conditions.