Getting approval for a new or modified septic system in the Port Macquarie Hastings LGA is a multi-step process involving a Development Application, site assessment, and ongoing compliance obligations. If you skip any stage, Council can order you to cease use of the system and potentially require complete reinstallation at your own cost. This guide walks through every step so you know exactly what is required before you dig a single hole.
Port Macquarie Hastings Council (PMHC) administers onsite sewage management (OSM) under the Local Government Act 1993 and the Environment Protection Authority’s NSW Septic Safe program. Every new system, upgrade, or significant repair requires a formal approval before work commences.
Who Needs Council Approval?
You need a Council approval if you are:
- Installing a new septic, AWTS, or composting toilet system on a property not connected to town sewer
- Replacing an existing tank or treatment unit (not just a pump-out or service)
- Modifying the land application area (extending, relocating, or changing effluent dispersal method)
- Converting from one system type to another (e.g., conventional septic to AWTS)
- Subdividing land where each new lot needs its own OSM system
Routine maintenance, pump-outs, and servicing by an accredited service provider do not require a new approval, but the original approval must already be in place.
Step 1: Pre-Application Planning
Before lodging anything with Council, you need to assess whether your site can actually support a septic system and which type is appropriate. This is where a site assessment and percolation test is conducted by a qualified consultant (typically a hydraulic engineer or environmental consultant).
The site assessment considers:
- Soil permeability and structure
- Slope and drainage patterns
- Proximity to waterways, dams, and bores
- Available land application area
- Distance from dwelling, property boundaries, and neighbouring bores
- Flood risk (particularly relevant on the Hastings floodplain and low-lying coastal areas like Lake Cathie)
For properties around Comboyne and inland Wauchope, reactive clays are common, which can restrict the type of land application area used. For coastal properties near Lake Cathie or Bonny Hills, a high water table may require elevated irrigation areas or AWTS with drip irrigation rather than conventional absorption trenches.
Step 2: Choose an Appropriate System
Based on your site assessment, your consultant or installer will recommend a system type. Port Macquarie Hastings Council generally accepts:
| System Type | Suitable Land Area | Typical Application |
|---|---|---|
| Conventional septic + absorption trench | Large rural lots | Wauchope, Comboyne, King Creek |
| Septic + leach drain | Moderate lots | Rural residential, acreage |
| AWTS (aerated system) + drip irrigation | Smaller lots, sensitive sites | Coastal and peri-urban |
| Biofilter system | Constrained sites | Limited space, higher treatment |
| Composting toilet + greywater | Very small lots, eco properties | Off-grid, steep terrain |
If your property is near the Hastings River, Camden Haven River, or any mapped wetland, Council will almost certainly require an AWTS with Class A or Class B effluent quality rather than conventional primary treatment.
For new systems, talk to us first, we can advise on what works in your specific area before you commission a full site assessment. See our septic inspections service for site consultation options.
Step 3: Lodge Your Development Application
You lodge a DA with Port Macquarie Hastings Council through their online portal or in person at the Council offices on Clarence Street. The DA must include:
- Completed DA application form (available on PMHC website)
- Site plan drawn to scale showing the dwelling, system location, land application area, and all setbacks
- Site assessment report from a qualified professional
- System specifications and manufacturer documentation
- Owner’s consent
- DA lodgement fee (see current PMHC fees schedule, typically $300 to $600 for a residential OSM approval)
Council has 40 business days to determine a DA, though straightforward residential applications are often processed in 20-25 business days. Complex sites or those near waterways may take longer, especially if a Statement of Environmental Effects is required.
Step 4: Construction Certificate
After your DA is approved, you need a Construction Certificate (CC) before any physical work begins. The CC confirms the detailed plans and specifications comply with the Building Code of Australia and the relevant Australian Standards (AS/NZS 1547:2012 for onsite wastewater management).
You can get a CC from:
- Port Macquarie Hastings Council (as the certifying authority), or
- A private accredited certifier
Using a private certifier can speed up this stage but you still must lodge the CC with Council before works commence.
Step 5: Installation by a Licensed Contractor
All septic system work in NSW must be carried out by a licensed plumber and drainer holding the appropriate endorsements under the Plumbing and Drainage Act 2011. Installing a tank or laying drainage pipes without a licence is illegal and voids your approval.
During installation, there are required inspection stages:
- Inspection prior to backfilling, the certifier inspects pipes, tank placement, and connections before any soil is replaced
- Final inspection, the completed system including the land application area is inspected before approval to use is granted
If your certifier is Council, you book these inspections through the Council’s building inspections team. Do not backfill before the inspection is signed off.
Step 6: Occupation Certificate and Registration
Once the final inspection passes, your certifier issues an Occupation Certificate (OC) which confirms the system is approved for use. Council then registers your system on their Onsite Sewage Management Register.
Registration is important for two reasons:
- It creates the annual servicing obligation, Council will expect to see service reports for AWTS systems (typically quarterly)
- It becomes a property record, future owners need to be aware of the system type and obligations
If you later sell the property, the septic system registration forms part of the property information provided to buyers. See our guide on septic registration and change of ownership for details.
Setback Requirements Under PMHC Policy
Port Macquarie Hastings Council applies setback distances consistent with NSW Government guidelines and AS/NZS 1547:2012. These are minimum distances, your site assessment may require greater separation:
| Septic Component | To Water Supply Bore | To Waterway | To Dwelling | To Boundary |
|---|---|---|---|---|
| Septic tank | 15 m | 6 m | 3 m | 3 m |
| Land application area | 100 m | 50 m | 15 m | 3 m |
| AWTS drip irrigation | 30 m | 15 m | 2 m | 1.5 m |
For properties near the Hastings River, Camden Haven, or Lake Cathie inlet, the 50 m waterway setback is non-negotiable and often extended to 100 m in sensitive areas.
What Inspectors Look For
When Council’s health and environment officers audit a system (either at installation or during a periodic compliance audit), they check:
- Actual setback distances match what was approved
- Tank lids and access points are functional and secure
- Land application area has no signs of surface breakout
- AWTS alarm and service log is up to date
- There is no odour or contamination risk to neighbours or waterways
If your system is failing, don’t wait for a Council inspection to find out. Book a septic system inspection now and address any issues proactively.
Common Reasons DAs Get Delayed or Refused
- Insufficient setback from waterways (very common on coastal properties near Lake Cathie)
- No percolation test or soil assessment provided
- System capacity undersized for the number of bedrooms/expected users
- Inadequate land application area (too small, unsuitable slope, mapped flood zone)
- Missing owner’s consent
- Proposed system type not appropriate for the soil type or site constraints
Modifying an Existing Approved System
If you want to expand your home (more bedrooms = more wastewater load), replace a failed component, or change the dispersal method, you generally need a new approval or at minimum a modification to the existing approval. Contact Council’s Development and Environment team first to confirm what approval pathway applies to your specific situation.
For straightforward component replacements (e.g., replacing an ageing concrete tank with a poly tank of the same volume), some works can be done under a complying development pathway, which is faster than a full DA.
FAQ
How long does a septic system DA take in Port Macquarie? Standard residential applications take 20-40 business days with Port Macquarie Hastings Council. Sites near waterways or requiring additional environmental assessment take longer. Having a complete, professional application package with a site assessment report ready when you lodge will reduce delays significantly.
Do I need Council approval to repair a septic tank? Minor repairs such as replacing a baffle, fixing a pump, or repairing a cracked lid typically don’t need a new DA. But if the repair involves relaying drainage pipes, replacing the tank, or altering the land application area, contact Council first to confirm whether an approval is required.
What happens if I install a septic system without Council approval? Council can issue a Penalty Infringement Notice (fine), order you to stop using the system, and in serious cases require you to remove and reinstall the system with proper approval. Unapproved systems are also a significant issue when selling the property.
Can I upgrade from a conventional septic to an AWTS without a new DA? Yes, but you do need an approval, this counts as a modification. The good news is AWTS upgrades are generally viewed favourably by Council, especially in environmentally sensitive areas.
Who do I contact at Port Macquarie Hastings Council for septic approvals? Contact PMHC’s Development and Environment Division. Their duty planners can advise on pre-DA requirements, and their Environmental Health Officers handle ongoing compliance for registered systems.
Ready to start the process? Request a quote; your installer and wastewater consultant carry the design, the council holds the approval, and the practical job is making sure paperwork and site match before work starts.