Fees charged by an architect are subject to a legal instrument. The architects registration (conditions of engagement and scale of fees) bylaws, 2009 provide for the minimum fee structure charged by an architect. However, the architect retains some level of discretion on fees based on a percentage of the cost of the works, a lump sum, or an hourly rate.
Always ensure to clarify the fees with the architect or look for this information in the terms of engagement or client/architect agreement that should be provided before your architect undertakes any work for you.