Aim: The research examines characteristics and challenges of homeless Emerging Adults in Vienna. Findings are linked to perspectives within Viennas supporting system for homeless people. Due to multi-complexity or health influences of homelessness in general as well as the examined fitting of client systems and their environment in particular, this research highly contributes to knowledge of Clinical Social Work. Theoretical Background: Studies on transition to adulthood propose the conception of Emerging Adulthood, focusing on the age period 18 to 29. Evidence is provided to the distinctness and instability of this period. At the same time, homelessness can be seen as a product of destabilisation, blocking the ability to cope with crises. Due to individual relations of destabilising factors, homelessness is multidimensional and storied. However, drafts on pathways of homelessness reveal differences in age, showing specific characteristics and challenges of Emerging Adults pathways. Concepts of support service providers therefore try to address this population explicitly. Still, evaluations point out, that providers are not always able to offer adequate access to support or adequate support per se. The support system Viennas for homeless people is primarily based on stages. Each stage offers more stability, but is more restricted in access. This applies in particular to the stage of transitional living, which access is regulated by certain criteria. A Viennese expert group suggest disadvantages in accessibility for homeless Emerging Adults by the system, based on relations of quantitative data on shelter users and transition home users. Methods: To examine influences on access to transitional living of homeless Emerging Adults Viennas (18a to 30a) characteristics and challenges are identified by quantitative data of the supporting system and a Qualitative Content Analyse on documentation (n=82) of cases in the year 2016. Findings of the Qualitative Content Analyse are measured in frequency and described relative to durations of support for each client. Using those generated items as independent variables and the access status as dependent variable, logistic regression models (n = 62) are calculated to identify influences on accessibility. Results: The findings underline the multidimensionality of homelessness as well as the relevance of age. One third of the clients belong to the age cohort 18-30. Twenty relevant characteristics and challenges could be identified, giving proof to the populations heterogeneity. Even though, those characteristics concerning existential safety (e.g. financial support or shelter) are the most relevant over all, most clients counselling contained several of other topics (e.g. drug use or challenging communication during counselling) in high extend. Model performances of the logistic regression suggest two models relevant. While the model Support-Intensity is based on standardised or easily generated variables, the model Qualitative Content Analyse explains influences on the access to transitional housing of homeless Emerging Adults the best. Those models contain eight significant variables. Due to their regression coefficients and odds ratio, access to transition living for homeless emerging adults seem highly dependent on the intensity of deficits. Therefore, the consideration of clients resources is suggested.