The design focuses on an fixed and temporary intervention on an existing portiek dwelling in the Carnisse Eilandenbuurt, Rotterdam. Those dwellings are originally designed by architect Jo van den Broek. The portiek dwellings may be called minimum dwellings. The minimum dwelling is the theme of the research and design. The neighbourhood has always been a migration area. In today's situation the migrant is mostly coming from Eastern European countries and staying here temporary. The design focuses on this target group. This is the temporary part of the project; an flexible and durable interior unit, which is placed in the existing structure of the dwelling. The fixed part of the project focuses on the exterior and is an upgrade of the existing skin of the building.