Police Lt Col Natthaya Suphanphong of Kathu Police Station received the report at about 11:45pm from the Phuket Provincial Police 191 emergency centre, notifying her of a blaze in Soi 8, Anuphas Golf View Village, in Moo 7, Kathu.
Kathu Police responded to the scene and firefighters from Kathu Municipality quickly arrived and brought the flames under control.
The fire was confined to the second floor of the detached home, which sits on a plot of about 200 square wah (800 square metres). It was successfully extinguished before spreading to neighbouring properties.
Three people were inside the house at the time – homeowner Liwan Saffner, her Swiss husband, and her sister.
According to Ms Liwan, the family was asleep when they heard crackling sounds and saw smoke coming from a bedroom on the second floor. They immediately evacuated the house before flames engulfed the upper floor.
No injuries or fatalities were reported, though significant damage was sustained to the upper level of the property.
Police said initial investigations suggest the fire was caused by an electrical short circuit in the second-floor bedroom. The area has been cordoned off, and forensic officers have been notified to conduct a detailed inspection.
The incident was reported to Kathu Police Station and recorded as a house fire for further investigation.