Can You Install a Septic Tank Yourself in Australia?

No, you cannot install a septic tank yourself in Australia. Septic tank installation must be carried out by a licensed plumber and signed off by your local council authority, and this applies across all states and territories.

This is not bureaucracy for its own sake. It protects groundwater, neighbouring properties, and your own warranty. When you purchase a Polymaster septic tank, you are covered for 10 years, but the warranty is valid only if a licensed professional completes the installation.

What Approvals and Permits Are Required?

Septic tank installation involves a two-stage approval process. Requirements vary by state, so confirm with your local council before you begin.

• Pre-installation approval: Council must approve the system type, size, design, and placement. In NSW, this is a Section 68 approval; other states have equivalent permit processes. A qualified professional must also assess soil type, drainage, slope, and setback distances. This step cannot be skipped.
• Post-installation sign-off: Council inspects the completed system and issues a Certificate of Compliance before granting an Approval to Operate.

What Happens If You Install Without Approval?

Installing a septic tank without the required permits is not a grey area. Homemade or unapproved septic tanks are illegal, and the consequences are serious:

• Fines and legal action
• Difficulty selling your property
• Ongoing council compliance orders
• Liability for environmental contamination
• A void tank warranty

To find compliant septic tanks certified to AS/NZS 1546.1:2008, browse Polymaster’s septic tank range or contact our team to find the right system for your property.