A large fire broke out at a two-storey home on Ullapool Road in Mount Pleasant, a suburb of Perth, at approximately 3:20 am on Wednesday. Firefighters arrived to find flames spreading across both floors, from the front entrance to the roof.

Fire crews worked for about an hour to extinguish the blaze. The fire caused extensive damage to the building, including the collapse of part of the roof. Authorities said the property was no longer habitable following the incident.

The home was reportedly unoccupied because its residents were on holiday. Police confirmed that nobody was injured, avoiding what could have been a much more serious incident.

Investigators are also examining threatening graffiti found on the driveway. The words “pay your debt dog” were reportedly spray-painted at the property. Police are investigating whether the fire was deliberately lit and whether the message is connected to the incident. The cause of the blaze has not yet been determined.

A neighbour reported hearing two loud bangs before noticing flames coming from the rear of the house and roof. The incident shocked residents of the normally quiet street and raised concerns about safety in the neighbourhood.

The property was last sold in 2019 for approximately A$2.25 million, according to the report. The extent of the damage means the owners may face significant repair or rebuilding costs, although a final assessment has not been reported.

Western Australian Police Arson Squad detectives attended the scene and are investigating the circumstances surrounding the fire. Authorities have not publicly established who was responsible for the graffiti or whether it provides evidence of a motive.

The investigation remains ongoing, and the threatening message alone does not establish why the fire occurred. Police will need to examine the physical evidence and other available information before determining whether the incident was an intentional attack.