Landholders in NSW are entitled to build and maintain dams up to a certain size without a licence. You will not require a licence for:
- A harvestable right dam (i.e. small dams that collect rainfall runoff)
- Dams built before 1999 used for stock or domestic purposes
- Dams up to one megalitre on small properties
The total capacity of all dams on a property is called the Maximum Harvestable Right Dam Capacity (MHRDC). If the amount of water captured by the dam exceeds your property's MHRDC you will require a licence.