Fire crews from Mosgiel, Roslyn and Lookout Point were able to extinguish the fire, but not before one side of the property at 43 Perth Street was extensively damaged.
"We were told en route that the property was vacant, but we sent a crew through the front door to make sure of that," Mosgiel station officer Steven Turnbull said.
Fire and Emergency New Zealand (Fenz) was called at 2.42am yesterday. When personnel arrived, they concentrated on protecting the property on the right of the house, which was beginning to show heat damage. The neighbour on the left was briefly taken out of their house as a precaution, and police had already evacuated the neighbour on the right.
"We sorted that out that for the neighbour [on the right]," Mr Turnbull said.
![A Perth St, Mosgiel, property was badly damaged by fire yesterday morning. Photo: Gerard O'Brien](https://www.odt.co.nz/sites/default/files/styles/odt_landscape_extra_large_21_10/public/story/2017/10/house_fire_011017_0.jpg?itok=KOTB6AZa)
A Fenz investigator has declared the fire to be suspicious and police are now investigating.
The property was having work done on it: painters had been in the property during the week, as had electricians, Mr Turnbull said.
"It had been burning for quite some time. I’m unable to say when the fire began, but [through] experience and looking at the scene I would suggest it had been burning for quite some time before the neighbours were alerted to it."
The property had working smoke alarms which were going when Fenz arrived at the property, he said.
- Mike Houlahan