Councillors had already given the development outline planning permission in 2010, but had to consider a scaled down version when the academy's main sponsor - Durham University - pulled out.
However, it said that in relation to the Perth development, it has been given permission to expand to meet the demands of the immediate development issues.
The company currently holds land in Fife and Clackmannanshire with planning permission for development, but the business has only one completed house in Lochgelly for sale.