This depends on the following
Is it less than 70 square metres and also smaller than the main residential unit?
Then 0.5 HEU is payable for the services that are provided
Fees are probably not payable if the water, wastewater and stormwater services are already connected to the main residential unit.
Is it greater than 70 square metres or larger than the main residential dwelling?
Then development contributions will be charged at 1 HEU for each service provided.