Crews from NSW Fire and Rescue and the NSW Rural Fire Service arrived at the Lewis Road property shortly after 9am after a neighbour raised the alarm.

They found the property well alight, and were forced to fight the blaze from outside due to the threat caused by the carnage it had wrought on the structure and nearby power lines.

A NSW Rural Fire Service spokesman said the building was unoccupied at the time of the fire and its cause will be investigated.

The fire was being controlled about 10am but had fully involved the single-storey property, the spokesman said.

The Herald, Newcastle