The data situation concerning the office market in the big cities of Austria (except Vienna) is non-satisfying for owners, estate agents and investors. There is no transparency in the office sector referring the cities Graz, Linz, Salzburg and Innsbruck. No data or official information exists on office space or new construction volume, supply, demand, yield or other key figures. The FH Kufstein - the Real Estate and Facility Management Department and the OVI (÷sterreichischer Verband der Immobilientreuh‰nder, - developed a revolving market report concerning the office market. The report contains the existing space, the new construction volume, the volume of new tenancy but also vacancy rates and rent levels. As a second aim trends and opportunities on the western office market are analyzed. Key question is the total office space for the analysed cities. Different methods (e.g. space per clerks and expert interviews) are used to gain this relevant information. Similar methods create all other figures.On the ERES-conference the authors present the result of the study and we are looking forward to an interesting discussion.