DA case study: Building a home with a on-site wastewater system

DA case study: Building a home with a on-site wastewater system

If you are planning to build your home on a lot that is not connected to the town's reticulated sewerage system, then you will need to install an on-site wastewater treatment and effluent management system. It's best to start by talking with council about your plans. Then you will need to prepare a development application (DA) that must include a water cycle management study or equivalent information. These are best prepared by a specialist consultant who can advise on the best type of system for your lot and for you. Read more about choosing a consultant in the document below. As part of their assessment of your DA, council must determine whether your development will have a neutral or beneficial effect on water quality. If it does, then your development has passed the water quality test part of the assessment. See the figure below that shows the process for building a home with an on-site wastewater management system.

Case study 1 flowchart

  1. This process map only shows the assessment of those aspects relating to impacts on water quality e.g. stormwater, wastewater, erosion and sediment control, etc.
  2. Councils are able to undertake NorBE assessments for only certain types of development; otherwise the application will be referred to WaterNSW.


Sunday 26 January
1,100,178 ML
2,596,150 ML
8,216 ML
1,174 ML
-7,051 ML
Sunday 26 January