The main goal of this survey is to analyse the current Facility Management (FM) market trends in Bulgaria, to evaluate the importance of FM Departments in the Companies' structure and their significance in optimising the facilities' costs and thus adding value to the core business. The present research has been carried out with the support of Vienna University of Technology. Since 2005 the Vienna University of Technology has been analysing the demand side of FM on an annual basis in different European countries such as Austria, Bulgaria, Germany, Italy, Romania and Spain. The survey provides data about which specific areas are responsible for costs, why they cause costs, and why different cost drivers require differentiated cost control. The goal is to determine the value added of FM departments and the parameters influencing its magnitude. The scope of the data collection for this research are 25 randomly selected Bulgarian companies among the Top 500 (ranked by their revenues). The research is based on a mixed method approach that focuses on finding out the correlation between different variables. The main question is whether companies with a FM department are more effective in optimising their FM services costs and increase in productivity than those without a FM department and is outsourcing believed to be a cost-reducing technique.