Rainwater tanks

Benefits of rainwater tanks

Capturing rainwater from your roof is a great way to supply water for many purposes, including washing clothes, flushing toilets and watering your garden.

Rainwater tanks can also help you save money on your water bill, especially if you also use other water-saving devices such as dual flush toilets, water-efficient showerheads, trigger nozzles and tap timers.

Capturing rainwater and reusing it also reduces the amount of rainwater that enters the stormwater system. This helps improve the health of our waterways.

Too much rainwater from our urban areas affects our creeks by causing creek bank erosion, reducing the amount of food available to fish and aquatic animals, and increasing the amount of pollutants in the waterway.

Rainwater tank rebates

Council does not offer rebates for installing or using a water tank. 

Permit and regulatory requirements

You do not need a planning permit to install a rainwater tank, if all of the following are true:

  • the land is in a residential zone
  • the maximum capacity of the tank is 4,500 litres or less
  • the land is not in a Land Subject Inundation Overlay, and
  • the land does not have a Heritage Overlay, or the land has a Heritage Overlay, but the tank is not visible from a street (other than a lane) or a public park.

You can find the overlays for your property by typing your address into the Merri-bek Planning Scheme online.

If you do not meet all these requirements or you are not sure if they apply, you can contact Council.

The building requirements for rainwater tanks are:

  • Rainwater tanks must not encroach more than 500 mm into the required side or rear setback of the property
  • Rainwater tanks must not be constructed over easements without the consent of Council or relevant service authority
  • All works must be completed by a licensed plumber, and
  • The tank overflow must be connected back into the stormwater drainage system that discharges to the legal point of discharge.

Further information

For more information on building requirements for rainwater tank installation, contact Council.

The Victorian Government website provides information on capturing and using raintwater.