The aim of this qualitative study is to understand whether there is a difference for people with mental disabilities to grant the intervention housing with special service; according to either the Law of Support and Service for Persons with certain Functional Impairments (LSS) or to the Law of Social Welfare (SoL). Furthermore, the aim of the study is to explore how user organizations describe their cooperation with the municipality. In this study, I compare the municipalities of Malmö and Stockholm. Individual interviews were conducted with three persons from different user organizations and three interviews were conducted with persons working in the municipality. Information and official documents describing the intervention and the municipalities’ organization were also used for this study. The empirical data was analyzed through the sociology of law approach. The main results indicate that there is a difference between the intervention housing with special service depending on the regulation applied. Regarding housing with special service according to LSS, fewer persons live together and the cost is higher. The analysis shows that SoL and LSS differ in various ways which affect the intervention. The user organizations described the collaboration with the municipality as good but also containing several challenges.