He said the fire was reported about 12.15am and when Wangara fire crews attended, they required help from Joondalup, Duncraig and Osborne Park after advising the house was �fully engulfed�.
�Crews deemed the house too dangerous at first to enter and had no choice but to fight the flames from the outside,� Mr Tucker said.
�A neighbour who lives opposite the house told me he was woken by a massive explosion and when he walked outside, he said he could just see a giant fire ball above the trees in his front yard.
�He also told me he had heard from another neighbour that the fire had started by a visitor dropping his smoke.�
He said a Department of Fire and Emergency Services chaplain also attended to help the house occupants find alternative accommodation.