A secondary dwelling occurs when two dwellings are proposed to be constructed on an allotment of land which has been allocated one wastewater servicing point. Generally, they will require development consent, and include dual occupancies (either attached or detached) and granny flats. Secondary dwellings place additional demand and cost on the wastewater system. If you're planning to develop a secondary dwelling, please note developer services plan (‘DSP’) fees and other fees may apply.
Developer Service Plan (DSP)
• DSP fees are calculated according to the ET (equivalent tenement) of the proposed second dwelling. This is calculated as 0.2ET plus 0.2ET per bedroom or equivalent room.
Secondary dwellings may also attract additional fees or costs for works associated with additional infrastructure and servicing requirements, such as a second or larger wastewater collection tank.
The second dwelling is likely to be treated as a second service point for the purpose of ongoing service charges. All dwellings constructed on a lot will require a drinking water meter and recycled water meter to be installed and must be separately metered and billed.
Multi-Dwelling Development Guide