A firefighter, however, was injured. Authorities said the injury was minor.
Waikanae Fire Brigade Chief Fire Officer Sarah Sundgren was at the site this morning, and said the fire investigator had also been there today.
At this stage the investigator has ruled the cause of the fire as "undetermined".
Sundgren said it was a challenging fire.
"This was one of the most challenging ones in that you potentially had three fires," she said, referring to neighbouring houses.
She said the wind direction also made matters worse because it blew the fire back through the house.
There were several fire appliances on site this morning dampening down a few hot spots.
One of the house's occupants (a tenant) had been on the scene this morning, along with the evacuated owners of the neighbouring properties.
The owner of the destroyed house, who lives out of the area, was expected today along with his insurers.