Council approval for a septic system: the two approvals, the fees, and the one that doesn't transfer when you sell

Two approvals, not one. Almost every dispute an Australian homeowner has with a council over a septic system comes down to not knowing that, and to a second fact that is stranger still: the approval that lets you use the system belongs to you personally, and it does not come with the house.

Section 68, in one sentence

In New South Wales, on-site sewage management is governed by the Local Government Act 1993. Section 68, Part C, Item 5 requires prior council approval to “install, construct or alter a waste treatment device or a human waste storage facility or a drain connected to any such device or facility”.

That sentence is the legal root of everything that follows: the soil report, the design, the pre-backfill inspection, the certificate at the end. And it produces two separate consents.

How long the licence lasts, and what it costs

Councils band systems by risk and renew accordingly — the bands are set out further down. In practice each council draws its own lines within them.

The fees vary by an order of magnitude, and they are all published. A commercial guide claims councils charge $150–500; the actual numbers say otherwise.

Port Stephens charges thirty dollars where Northern Beaches charges three hundred and fifty for the equivalent consent. Neither is wrong; they are different councils recovering different costs. But it does mean any figure you read on a national blog is fiction until you check your own council’s schedule.

The approval you cannot inherit

Here is the fact that catches buyers, sellers, and the agents in between.

1. The vendor holds the approval to operate, in their name, renewed on a cycle.
2. Settlement. The approval does not cross. It stays with the person who has left.
3. The buyer applies for a new approval — within two months at Federation and Ballina, three at Port Macquarie-Hastings.
4. The council may inspect first. Tamworth Regional and Federation both do, on any change of ownership.

In New South Wales the approval to operate is issued to the landowner. It attaches to the person and the activity of sewage management, not to the tank in the ground. When the property sells, the approval does not travel with it. The purchaser must apply for a new approval to operate in their own name.

Councils give a short grace period and then expect the paperwork. Federation Council lets a new owner run the system for up to three months but wants the application lodged within two of settlement. Ballina Shire also asks for two months. Port Macquarie-Hastings gives three.

Several inspect before they will issue it. Tamworth Regional and Federation Council both require a council inspection on any change of ownership. Ballina Shire advises the vendor to arrange an inspection by a licensed plumber before sale and hand the checklist to prospective buyers.

Victoria treats it as a transfer rather than a fresh application, and prices it accordingly: Yarra Ranges Council charges $155.00 to transfer a permit to install or alter to a new owner, and Mount Alexander Shire publishes $171.49 for a septic tank permit transfer. Port Stephens simply updates its records and forwards a copy of the approval and its conditions to the new owner, with the $55.00 annual renewal continuing.

A vendor who has to check does not have an approval to operate. That is the entire diagnostic.

Risk bands: the invisible rule that sets your inspection schedule

Councils do not treat every system the same. They band them by risk, and the band decides two things you will live with for decades: how often the approval must be renewed, and how often an officer arrives.

Nothing about your household puts you in a band. The site does: proximity to a drinking-water catchment, a bore, a waterway, a small lot, a high water table, a system type with moving parts. An aerated system generally attracts quarterly servicing by a licensed technician as a condition of the Approval to Operate — which means the council has effectively written a service contract into your licence, and cancelling the contract cancels the licence.

That is the single most under-appreciated consequence of choosing an AWTS. The capital cost is quoted. The band is not.

When an approval lapses

An approval is not a certificate of merit; it is a permission with an expiry date. When it lapses, the system is non-compliant — not “due for renewal”, non-compliant. The owner must reapply, and the council may inspect to confirm the system meets current performance standards rather than the standards it was built to.

That last clause is where money hides. A system installed lawfully in 1998 and never renewed can be assessed in 2026 against 2026 expectations. Failure to maintain a current approval leads to orders, fines, or legal action.

The practical defence is a calendar entry, not a lawyer. Approvals run 1, 2, 3, 5 or 10 years depending on the council and the band, and the renewal notice goes to the address on file — which, after a sale, is somebody else’s.

What it costs to be wrong

Installing or altering without approval breaches section 68. Operating without approval breaches section 627. Polluting, or ignoring a clean-up notice, engages section 96 of the Protection of the Environment Operations Act 1997.

Councils escalate rather than prosecute. The order comes first, then the notice, then the court. What makes the ladder expensive is not the fine at the top but the works at the bottom: a system that cannot be approved has to be replaced, and that is $15,000–25,000 if the trench cannot be rebuilt.

The document trail, in the order you will need it

Nothing in this article is difficult. It is only sequential, and the sequence is unforgiving because each step produces the input to the next.

A site and soil evaluation produces a soil category. The soil category produces a design. The design produces a section 68 approval. The approval produces a lawful installation, which produces a pre-backfill inspection, which produces a final inspection, which produces the Approval to Operate. The Approval to Operate produces a renewal date, and the renewal date produces the next inspection.

Skip a step and the chain does not fail immediately. It fails at the point where somebody asks for a document that was never created — usually a conveyancer, four days before settlement, on behalf of a buyer who has already sold their own house.

Keep four things in one folder, digital or paper. The site and soil evaluation. The approved design. The photographs from the pre-backfill inspection. And the current Approval to Operate, with its expiry date written on the front.

That folder is the only asset in this article that appreciates.

Elsewhere in Australia

Queensland issues a local government approval and, for treatment plants, a Treatment Plant Approval — from the Department of Housing and Public Works for systems up to 4.2 kL a day, and the Department of Environment, Science and Innovation above that. Victoria issues a permit to install or alter and then a certificate to use, administered by the council. Western Australia issues a permit approving the use of the apparatus. South Australia works through the local council under the National Construction Code.

The names differ. The structure does not: somebody assesses your soil, somebody approves a design, somebody inspects before backfill, and somebody licenses you to operate what was built.

Before any of it, size the system with the tank size calculator and check the type with the which system calculator. Installing a septic system walks the eight steps and the two inspections; what a septic system costs prices them; the absorption trench explains the soil report that every approval depends on. The same approval-or-not question comes up with greywater diversion devices, where the answer turns on a different distinction entirely: whether the device treats the water or just moves it.