How prices are set

An explanation of the annual pricing review process, how water prices are set and how rateable value is used.

Changes to our prices for 2017–18

Each year, our prices are reviewed and set by the State Government, as part of the State Budget process. In making its decision, the State Government considers the cost to provide water, wastewater and drainage service and the impact any changes will have on you, our customers.

From 1 July 2017, water use and service charges will increase by 6% on average. You can use our online bill and charges tool to calculate service and water use charges for your home.

Your bill & charges

We are here to help

We understand the impact these changes may have. We look at every situation on a case-by-case basis and have a range of flexible payment options that can be tailored to meet your needs.

Rateable value

We use the rateable value of your property to calculate the sewer and drainage charges.

The rateable value is based on the annual rental value of your property, which is what you might receive if you leased out your property, or by a percentage of the vacant land value. Landgate Property Valuation Services provide this figure.

The calculation of a rateable value for a residential property is based on a number of factors, such as:

  • location
  • proximity to services (schools, public transport, shops etc) 
  • age and functionality 
  • additional facilities 
  • provided accommodation 
  • size and area
  • age of property. 

For residential vacant land and other specialised properties, the rateable value is based on 3% of the property's capital value, or the amount the land and any buildings might reasonably sell for.


Properties in the metropolitan area are revalued every 3 years, and regional areas are revalued on a recurring basis dependent on local governments.

There is also a process each year, which assesses properties that have had additions or improvements done.