How and when is the GRV determined?

All properties within a local government area are assessed at the same date. This date is used by valuers to ensure a fair and equitable assessment is completed for all properties at a given point in time. The assessment date, which is known as the date of valuation or DoV is conducted every 3 years for the metropolitan area and 3 to 6 years for regional areas, depending on the local government. The Gross Rental Value (GRV) remains in force for the respective 3 to 6 year period, until the next GRV is calculated.

Find details of the most recent date of valuation for metropolitan and regional areas.

Valuers at Landgate collect rental evidence at the date of valuation. The rental evidence is analysed to establish property market levels, with individual property attributes considered to determine a fair rental value for each property.

Given the time it takes to collect and analyse evidence and calculate new GRVs for all Western Australian properties, there is a delay between the date of valuation and the date the valuations are applied by local governments. For local governments located in the metropolitan area this timeframe is 23 months between the date of valuation and the effective date (when they can apply the valuation to generate rates, taxes or charges). For local governments located in regional areas this timeframe is 11 months.

The diagram below represents the timeline of a GRV calculated every 3 years. The date of valuation (in this case 1 August 2018) is the date all properties within a local government area are assessed at, to determine GRVs. The effective date (in this case 1 July 2020) is the date the GRV is applied by local governments and other rating authorities. You can see how the GRV is applied to your rates notice over a 3 year period.


For more information, watch our GRV Videos.

This page was last updated on: 10 Mar 2021