Infrastructure contributions for greenfield subdivisions

Find out how we calculate infrastructure contributions for greenfield subdivisions.

Water supply, wastewater and drainage contributions are based on the provision of a base level of service to each new lot.

Standard Infrastructure Contributions (SICs) are payable when there is a subdivision that requires any combination of water, wastewater and drainage services. They are applied as follows:

Water – 1 SIC per lot for all land use types

Wastewater – 1 SIC per lot for all land use types

Drainage – SICs only apply in the Perth Metropolitan declared drainage areas:

  • Residential – 1 SIC per lot.
  • Schools and universities on lots greater than 3 hectares – 1 SIC per lot + 1 SIC for each 1250m2 of the lot area and part thereof.
  • Non-residential and schools and universities, on lots less than 3 hectare, 1 SIC per lot + 1 for each 350m2 of lot area and part thereof.

SICs are not payable on the creation of public open space and crown reserves, as there is no inherent demand for a water service.

The above information is a guide for calculating the level of infrastructure contribution requirements for your subdivision.

For further general information about infrastructure contributions and our current infrastructure contributions for this financial year, please refer to the Infrastructure contributions page in our Fees & charges section.

Alternatively you can contact us on or call (08) 9420 2099.

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