The fire broke out in the wooden house opposite the Seventh Day Adventist Church compound at Railway Road yesterday morning.
The owner of the house Kimami Sitauti is residing in Australia with his family.
The 14.8m long and 8.5m wide house was unoccupied at the time of the blaze.
Radio and Television Tonga witnessed the firemen trying to control the blaze, and a van which was parked outside the house which was also caught on fire.
