But fire safety staff, who yesterday spent more than five hours searching through the ruins of the Glencoe Rd property, near Arrowtown, say the cause of the fire is still unclear.
"No, we are still investigating," fire investigation officer Mike Cahill said when asked if he could say what had caused the fire.
"But we are not treating it as suspicious at this stage."
Mr Cahill said while he had a reasonable idea of the cause, he still had other witnesses to interview and hoped he might be able to release his findings in the next day or two.
He believed the house - a small part of which was "very historic" - was being renovated at the time and had been renovated several times previously.
It was unclear if the property was insured.
Detective Grant Miller said police would not release the name of the 48-year-old man who died at the scene on Monday because some next of kin had not been contacted, but they hoped to do so today. He confirmed the man, who lived nearby, had raised the alarm on the night.
There was no-one in the house at the time of the fire.
A doctor had yesterday confirmed the man had a pre-existing medical condition, so his death would not be referred to the coroner, he said.
While he had not spoken to the owner of the house, which sits on a 48ha property, Det Miller had talked to the person overseeing the development.
About 30 firefighters from the Arrowtown, Queenstown and Frankton brigades were called to the scene just after 7pm on Monday but the house was already totally involved when they arrived.
