A planning permit is generally only required for a rainwater tank if the site is covered by a Bayside Planning Overlay (i.e. heritage overlay or sites less than 500m2 in area) and where the tank is visible from the street or the tank has a volume of greater than 4,500 litres. If in doubt about planning permits, please contact our Statutory Planning Department on (03) 9599 4444.
Water tanks are deemed to be un-classifiable structures pursuant to the Building Code of Australia and therefore do not require a building permit, provided the following items are satisfied:
- The water tank is installed on the ground, free standing and self-supporting and therefore not relying on any other building or existing structure (i.e. a boundary fence) for structural support.
- The water tank is not elevated. (If the tank is elevated the stand or support structure will require an engineer's design and may be subject to a building permit).
- The water tank cannot be located over an easement unless approved by the authorities that have rights over the easement.
- The water tank must be professionally designed and manufactured in accordance with the applicable Australian Standards and installed in accordance with the manufacturer's specifications.
- The water tank must be fitted with an overflow pipe of the same diameter as the inlet pipe and this overflow pipe must be connected to a stormwater system that discharges to a legal discharge point.
- Water tanks must be installed by a licensed plumber.
- Stored water should be kept free of contaminents, such as leaves, animal/bird droppings and pollutants.
- Water tanks must be sealed to prevent risk to small children and to keep out insects, vermin and other animals.
- Water tanks cannot be used for the storage of grey water.
- Water tanks should not be located forward of the dwelling and sited so they do not interfere with the amenity of any adjoining properties.