International Travellers can NOT quarantine at a residential address. All people arriving into WA from overseas are subject to the Australian Government’s mandatory quarantine period of 14 days in a State Quarantine Facility (hotel quarantine) at their own expense, except in cases of extreme hardship.
If you are an international traveller you can nominate any Hotel Accommodation for your quarantine however do not book the accommodation. You will be designated a State Quarantine Centre on arrival.
You can visit this link for more information: International arrivals to WA