The 21st century reveals itself as an era of multiple crises, the effects of which are becoming increasingly apparent. Climate change, demographic shifts, socialpolarization, and economic upheavals are not only transforming the conditions of housing but also calling into question fundamental assumptions about housingquality, comfort, and social participation. Housing construction thus moves to the center of the societal negotiation processes: it becomes a site where structuralinequalities are contested and a projection surface for possible future scenarios.Within this field of tension, architecture expresses urgent societal transformations.Technically highly optimized buildings, standardized construction regulations, and space-intensive housing forms are coming under pressure in light of ecologicallimits and unequal access to participation. At the same time, it is becoming clear that comfort cannot be determined solely by measurable parameters such astemperature, humidity, or energy efficiency. Rather, the question arises under which spatial, social, and institutional conditions housing can be experienced as comfortable— and for whom.Based on this observation, the present work examines the concept of comfort (Behaglichkeit) as a central category of housing. Comfort is not understood as atimeless or universally valid category, but as a condition produced culturally, socially, and spatially. At the core is the question of the “technique of comfort”, understood as a historically and socially shaped practice that is produced, stabilized, or limited by institutional frameworks.The focus lays on social housing in Vienna, which, due to its specific historical development, its high proportion of subsidized housing, and its particular positionwithin the European market, represents a particularly suitable field of investigation. However, Vienna does not function as an exceptional case, but as an exemplarycontext in which central questions of European housing policy and architecture become visible.Methodologically, the study combines a conceptual-theoretical analysis with the examination of concrete architectural typologies. In the first part, the terms “Komfort” and “Behaglichkeit” are derived in their etymological context and historical usage, and their differences and similarities are examined. Building on this, the following section situates residential comfort within the context of currenthousing policy, in the field of tension between urban regulations, the free market, and as a result of the social production of space. These theoretical foundations form the basis for the subsequent analysis of selected housing forms.In the analytical third part of the study, comfort is examined along contrasting housing models. Housing forms at the margins of the system are considered, in which comfort emerges not as a permanent quality but as a precarious condition.Building collectives (Baugruppen) and neighborhood housing projects are analyzed as responses to ecological and economic limits to growth, where collective organization and spatial flexibility generate alternative “techniques of comfort”. Finally, a intergenerational housing ensemble is interpreted as model of institutionalized care, in which a specific technique of comfort is manifestedthrough state frameworks, social infrastructure, and architectural form.The central research question of the study is: What understanding of comfort can be identified in Viennese housing, historically and in the present, and how is a “technique of comfort” expressed in spatial, social, and institutional structures under the conditions of current societal challenges?By addressing this question, the study aims to sharpen the concept of comfort as an analytical category of housing while also contributing to the discussion of socialsustainability in housing. Ultimately, it seeks to develop a new perspective on the role of the architect, the use of institutional tools, and societal housing practices.The study does not present itself as a normative guideline, but rather as a critical investigation of the conditions under which housing today can be experienced asprotective, appropriate, and livable.