Housing is a key determinant of people's quality of life and well-being. It is the space in which individuals express their identity, privacy, and sense of security. Access to adequate housing is therefore a fundamental human right and a prerequisite for a dignified life, as also emphasised in the Resolution on the National Housing Programme 2015–2025. However, Slovenia faces a shortage of rental housing, particularly public rental housing, despite having a surplus of dwellings relative to the number of households, especially in the most sought-after locations. Housing policy is therefore increasingly focused on expanding the stock of public rental housing. A key prerequisite for this is the provision of developable land for public housing construction, which can be supported through measures based on the principles of circular land use management. The concept of circular land use management has emerged as a guiding principle for all activities related to spatial development, including spatial planning, land policy measures, and construction. Its implementation enables more efficient use of existing urban areas and reduces the need for the development of new land. Within this framework, the regeneration of degraded areas is promoted, while new developments are directed primarily towards the internal development of settlements by making use of underutilised areas rather than undeveloped building land. In addition to the regeneration of degraded areas, the principles of circular land use management can also support the provision of public rental housing through the reuse of the existing building stock, particularly vacant dwellings. Measures based on circular land use management can therefore reduce the spatial pressures associated with public housing development. To achieve these objectives, it is first necessary to establish a comprehensive national register of suitable publicly owned land and properties. Such a register would facilitate the effective planning and implementation of public housing construction. Since no such register currently exists in Slovenia, the purpose of the research project is to identify suitable publicly owned land and properties for public housing development, prepare a comprehensive inventory, assess the suitability of sites, establish databases of suitable land, and develop expert foundations for the long-term planning of public housing construction.