The "Eruv" is a Hebrew term for a well-known Jewish religious law and practice which has a twofold aim: first, it creates a boundary around a Jewish community and second, through this it allows for the otherwise prohibited transportation of objects on the Sabbath (The Jewish day of rest). In constructing this boundary, it creates a clearly marked private and public realm, according to Jewish law, so that the Sabbath can be observed. The practical solution of the 'Eruv' constitutes a symbolically determined boundary (mainly from string and poles) around a shared space, transforming them into a single 'private sphere' therefore allowing for carrying within those specific confines, according to Jewish law. Moreover, in order for the Eruv to be valid, some form of shared meal should be placed within its borders, symbolizing the urge to participate in community practice within the 'Eruv'. While these legal aspects of Eruv have received Jewish legal scholarly interest, there remains a lacuna insofar as a conceptual and theological framework is concerned. This paper will claim that the regular debates around the 'Eruv' should be considered from the conceptual perspective with specific regard to sustainability and spatial justice. In light of this, this presentation will address this lacuna through exploring both similarities and differences between 'Eruv' and 'Kibbutz' communities along the themes of exclusion vs. inclusion, religion vs. secularity, communality and power relations. In this sense, this paper contributes an original and novel study of a Jewish aspect of sustainability which has little been discussed to date.