Limited availability of building land and push effects to the surroundings of regional centres ask for innovative approaches to create affordable and eco-friendly living space. Based on surveys with home seekers, transitory flats and matching mobility offers have been elaborated and combined with GIS-based densification potentials and settlement types respecting location and target groups. For application in planning practice, the WohnMOBIL construction kit offers decision support tools for communities and constructors at different intervention levels.