Mr Smith said the heat and amount of smoke being produced meant an attempt to get back into the house was out of the question.
"It wasn't worth the risk."
He said while most things could be replaced, he was concerned about his computer's hard drive that not only stored lots of photos, but also his farm management information.
After looking through the house after the fire had been put out, Mr Smith said the interior was worse than he thought it would be. "Two of the three bedrooms are totally ruined, fire has even burned holes in the floor, while the third bedroom and living areas are pretty badly damaged."
Downstairs had also had a large volume of water through it.
A visibly upset Mrs Smith was also taken through the home by fire officers.
Whakatane deputy chief fire officer Malcolm Rowson said a youngster playing with matches had been identified as the cause of the fire.
"By the time the father got to the bedroom the curtains of the bedroom were already ablaze."
He described the fire as a K99, meaning it was well involved when the two fire trucks and one water tanker arrived. A neighbour described the blaze as spectacular.