Low consumer confidence in Perth's property market has caused a slump in home sales figures not seeing since the 2008 Global Financial Crisis.

RP Data-Rismark's June figures released this morning confirmed the state's dismal performance for the year, after an Australian Property Monitors report released yesterday revealed Perth's home values had slumped by 5.8 per cent.

The figures show Perth well exceeded the national drop of 2 per cent since June last year, with a hefty 4.7 per cent plunge in city home values.

The only state with a steeper drop was flood-ravaged Brisbane with 6.3 per cent.

House prices in Perth dropped by 5.5 per cent, lowering the median house price to $475,000. Unit prices in the city also declined, but the drop was not as severe, with a 1.1 per cent slide taking the median unit price to $400,000.