Septic system approval in New South Wales
Written by Septic Help editors Checked against the NSW Local Government Act 1993 (s68) Last reviewed
The rules in NSW at a glance
- Approval name
- Approval to install & approval to operate (s68, Local Government Act 1993)
- Who signs off
- Your local council
- What you need
- Site plan, on-site wastewater assessment report, specification of a NSW Health–accredited system
- Typical timeframe
- 4–8 weeks from lodgement
- Typical fees
- $300–$700 for the install approval; many councils charge an ongoing operate/inspection fee
- The NSW twist
- Approval to operate is separate and renewable — it follows the property to every future owner
NSW regulates on-site wastewater under section 68 of the Local Government Act 1993: one approval to install the system, and a second, ongoing approval to operate it. Councils administer both — they keep a register of every on-site sewage management system (OSMS) in their area, and many run risk-based inspection programs against that register. The requirements differ enough between councils that the same system can be straightforward in one shire and knocked back next door.
The system itself must be one accredited by NSW Health. The Ministry of Health accredits sewage management facilities — septic tanks, aerated wastewater treatment systems, composting toilets and greywater devices — and councils will only approve models holding current accreditation. Clarence Valley Council's lodgement guide, like most, asks applicants to nominate the accredited system and attach the wastewater report up front.
The process, step by step
Site and soil assessment
A qualified assessor tests soil and site constraints to AS/NZS 1547 and recommends system types and land application area sizing. Councils rely on this report, not the installer's opinion — see what the assessment costs.
Choose a NSW Health–accredited system
The assessment narrows your options. Compare systems before asking for quotes so you're pricing like against like, and confirm the model's accreditation is current.
Lodge the s68 application to install
Council form, site plan, the assessor's report, system specification and the fee. Some councils want the licensed installer named at this stage; several now take lodgement through the NSW Planning Portal.
Install and council inspection
A licensed plumber/drainer installs; council inspects critical stages before backfill. Don't let anyone cover trenches early.
Approval to operate
Once commissioned, council issues (or renews) the approval to operate — the ongoing obligation that transfers with the property, with buyers able to apply to have it transferred at settlement.
| Item | Typical fee | Notes |
|---|---|---|
| s68 approval to install | $300 – $700 | Council application form + plans + wastewater assessment report |
| Inspection fees | $100 – $300 | Per inspection; some councils bundle into the application |
| Approval to operate / OSMS fee | $0 – $150 /yr | Varies widely — some councils charge annually to fund inspection programs, some don't |
| Wastewater assessment report | $700 – $2,500 | Paid to a private consultant; required on most new installs and constrained sites |
After approval: the operate approval follows you
NSW is the state where the paperwork genuinely never ends. The approval to operate carries conditions — servicing for aerated systems, pump-out record-keeping for septics — and many councils inspect on a risk-rated cycle, charging the annual OSMS fee to fund it. When you sell, the operate approval and inspection history are exactly what the buyer's conveyancer requests from council, and an expired approval or an outstanding defect notice becomes a settlement problem. Treat the operate approval like rego: know when it renews, keep the service reports filed, and fix small defects before an inspector finds them. If you're on the buying side instead, our septic inspection guide covers what a pre-purchase check should include.
Check your council
Setbacks, buffer distances, local approvals policies and operate-approval renewal cycles are set per council. Council-by-council guides are coming soon — until then, search your council's name plus "on-site sewage management".
NSW councils with large septic populations
- Hawkesbury
- Wollondilly
- Wingecarribee
- Cessnock
- Mid-Coast
- Port Macquarie-Hastings
- Byron
- Tweed
- Central Coast
- Clarence Valley
- Eurobodalla
- Northern Beaches
Common questions
What's the difference between approval to install and approval to operate?
The install approval covers the construction of the system; the operate approval is the ongoing licence to use it. The operate approval is renewable, can carry conditions like servicing and inspections, and transfers to the new owner when the property sells.
I'm buying a house with a septic in NSW — what should I check?
Ask council for the OSMS register entry, the current approval to operate and the last inspection result. A missing or expired operate approval is a negotiating point — our buyer's guide covers the full checklist.
Does an AWTS need anything extra in NSW?
Yes — the approval to operate for an aerated system almost always carries a condition requiring quarterly servicing by an authorised service agent, with reports sent to council. Budget for it: see servicing costs.
Do I need development consent as well as the s68 approval?
If the system is part of a bigger build (new dwelling, major extension), the development application and s68 approval usually run together. A stand-alone replacement system generally needs only the s68 approvals — your council will confirm which pathway applies.
Ready to talk to someone?
Browse accredited NSW installers and service agents — or get quotes and let them come to you.