An investigation into the cause of the fire is under way.
Photos taken today show gaping holes in the roof following the blaze.
Police and Fenz staff can be seen on the property, with tape strung across an entrance to the building.
Newstalk ZB reporter Ethan Manera was at the scene yesterday and said at least seven fire appliances responded.
No one was in the building and Wellington Free Ambulance told the Herald nopatients had been transported for further treatment.
Yesterday, Fenz advised Kelburn locals to avoid smoke from the smouldering building.
“People are advised to avoid the area to allow Fire and Emergency crews to work,” it said in a statement.
“There is some smoke in the area, so if you are affected, keep your doors and windows shut and turn off your air conditioning.”
Melissa Nightingale is a Wellington-based reporter who covers crime, justice, and news in the capital. She joined the Herald in 2016 and has worked as a journalist for 10 years.