On 17 June 2021, the Government of the Republic of Slovenia adopted a Bill on Long-term Care. This legislative activity also raised the question of the existence and effectiveness of a legal environment to promote social infrastructure development for housing and care of older adults. Social infrastructures include the facilities in which long-term care services are provided. Therefore, the new legislative proposal also raised the issue of the regulation of this social infrastructure and the housing and care solutions as a part of the social infrastructure since they benefit individuals and communities. Furthermore, in line with the growing trend towards deinstitutionalisation, the legal environments should enhance alternative housing solutions for the elderly. The purpose of this article is to describe the foundations of the social infrastructure for older adults and examine the legal basis for its provision. The research belongs to legal geography studies, which means that the substance of laws and materialisation in space are considered. We identified two primary spatial–legal barriers to overcome, which are (a) the separate treatment of the housing and health aspects and (b) the absence of the guarantee schemes for the construction of housing-with-care solutions. The results would be helpful for the optimal organisation of integrated care, which individual research groups in Slovenia are studying.