The intention of this thesis is to investigate the competition in social housing development of Vienna from 1919 to 2010. The residential care affordable to broad social classes after both world wars in Vienna was to a great extent in the hand of municipality.
Nevertheless, since the 1980s non-profit housing companies have taken care of this task increasingly. This development led to the disappearance of the city of Vienna as principal since 1995 for the realization of competitions in the residential construction but has been taken up by Wohnfonds_Vienna. The aim of the work is to examine and to estimate the effects of this change in competitive culture and as to how the implementation of the developer's competitions has affected the professional guild of the freelance architects. To make the changes tangible, the structures of the competitive situation are being compared from 1919 to 1995 in contrast to the structures of the situation after 1995. It is indicated how things have changed, like the residential housing politics and the city's magistrate internal general conditions of competitions in social housing. Especially of interest are the exclusion mechanisms and the criticism of freelance architects in regard to the workable competitions which are being practiced. Historical and present statements are systematically processed partly within the scope of reactions of expert's interviews. At last, this work tries to propose improvements in the method of developer's competitions.