Drainage charges are based on the rateable value or Gross Rental Value (GRV) of the property.  The rateable value is the Gross Rental Value of the property (or estimated gross annual rent) which is determined by the Valuer General.  Charges are calculated by multiplying a rate (cents in the dollar) by the GRV and may be subject to a minimum charge. 

The drainage system for urban development consists of roadside drains, piped drains and open channels. Water Corporation have responsibility for providing, operating and maintaining the main drain component of this system for approximately 40% of the developed urban land in Perth. 

For more information on residential charges, see www.watercorporation.com.au/my-account/rates-and-charges.

For more information on business charges, see www.watercorporation.com.au/home/business/my-account/your-bill-and-charges.

For more information contact our office on 1300 663 566.