Saturday night's out-of-control party near Jandakot, which resulted in seven arrests and a man taken to hospital for a stab wound, has been described by Deputy Police Commissioner Chris Dawson as the worst on record.

Police have reiterated they will be taking a hard line approach to uncontrolled parties and will be responding to these events with what's "in proportionate to what's in front of us."

The smashed window of a St John Ambulance after it attended an out-of-control party.

The party, which was held in a disused shed on a rural property between Southhampton Drive and Warton Road in Piara Waters, was publicised on social media and attracted over 500 revellers.

Many of those at the party were juveniles and under the influence of alcohol.