Central demolition workers will meet with engineers and building owners next week to determine the best course of action for removing the last of Thain's building.
Demolition began in early August after the building was ravaged by fire on July 20, resulting in extensive damage to the floors and roof.
At the start of September, contractors stopped demolition with one wall remaining, the one closest to the Thai Villa restaurant.
Central Demolition managing director Ian Butcher said the meeting would determine the best way they can remove the wall without compromising neighbouring buildings.
"The biggest issue we have with it is just how connected the two walls are and if they share a foundation and, if they do, what we do about that," Butcher said.