Install a Rainwater Tank

Do I need a Building Permit to Install a Water Tank?

Domestic rainwater tanks do not require a Building Permit as the tank itself is not classified as a building. However, if the tank is contained within or on a proposed building, or supported by an existing building, a Building Permit is required.

You should always install a rainwater tank in accordance with the manufacturer’s specifications and guidelines and the rainwater tank must be installed by a licensed plumber. The overflow pipe for the tank must be connected to the existing underground stormwater system to avoid stormwater being discharged over your land or your neighbours land, when the tank becomes full.

A suitable support base should be provided for the water tank to ensure the tank does not slip or subside once filled to capacity.  It should be noted that the weight of a standard domestic water tank can be multiple tonnes when full. A building permit is not required to construct a tank on a raised platform or stand but the structure must be capable of withstanding the weight of the tank when full. Always check with a structural engineer to ensure that the footings and frame are adequate.

When locating a water tank close to a side or rear boundary, the water tank must be setback from the boundary fence by a minimum of 500mm and consideration should be given to the amenity of adjoining neighbours. Consideration must also be given to the overall height of the tank, including any pipe work projecting from the top of the tank.

Do I need a Planning Permit to Install a Water Tank?

The Planning Services unit can provide advice on whether a planning permit is required to install a water tank. For more information, see Do I need a planning permit?