Socio-political concerns of lesbian, gays, bisexuals, transgender, intersexual and queer people (LGBTIQ) find increasing consideration in western societies since the 1960s due to different emancipation movements. Pride parades have thus become festive events in big European cities. However there exist socio-cultural institutions made by and for LGBTIQ people, away from short-term media attention. The present thesis examines the relations between these specific LGBTIQ community spaces and urban space through ten examples in Budapest and Vienna. Such premises have, as strategic platforms for the social, cultural and political organization of sexual minorities in largely heteronormative societies, manifold meanings. On the one hand they offer relatively protected meeting points and workspaces for different users. On the other hand these places also function as material interfaces to the public sphere. In doing so they can be potential bases for groups to express shared values and issues. Forms of interaction with the surroundings represent, beside self-expression, a central aspect of their relation with urban space. The examined objects can be clubhouses, culture and communication centers, as well as squats. They are mostly banal buildings and are impacted on by neighborhood transformation processes. The present thesis looks into the respective circumstances of access to space, the means of design and of appropriation of the premises. The material-architectural situation is considered hereby in connection with the respective cultural, historical, legal and political context.