Rainwater tanks

rain water tanks next to a house


Water tanks must be installed and certified by a licenced plumber

Home rainwater tanks do not need a building permit, however if there are any earthworks, retaining walls or any type of building structure associated with the tank, you may need to apply for a building permit and/or planning permit.


Tanks must have an overflow pipe of the same diameter as the inlet pipe

The outlet must be connected to a stormwater drainage system, going to the legal point of discharge.

Where to place your tank

  • Tanks must be at least 500mm from any boundary
  • Tanks should not be placed over septic systems, including sand filters)


Rainwater tanks should be professionally designed and made of non toxic, corrosion resistance material.

Water collected may not be suitable for drinking as it may be contaminated by the surface it was collected from. Tanks should be sealed to prevent insects, vermin and other animals entering. Unsealed tanks also pose a risk to children.