The Dutch population is ageing. The impact of the housing situation of the elderly on society is therefore increasing. The current housing situation of the elderly may be inappropriate regarding the use of space and the wellbeing of the residents. Especially the housing situation of owner-occupiers aged between 55 and 75 is not suitable. Relocation can improve the housing situation of these older adults. However, in the Netherlands, the willingness to move is low for older adults, which is one of the reasons for their low residential mobility. It is, however, unsure what will work in enhancing this willingness to move, as there are currently no well-developed instruments regarding this issue. There is also not much research on possible interventions regarding the willingness to move of owner-occupiers aged between 55 and 75. Therefore, this research aims to examine how instruments can increase the willingness to move of owner-occupiers aged between 55 and 75. The main research question of this study is: How can the willingness to move of owner-occupiers aged between 55 and 75 be increased by instruments on a municipal level? To answer the research question qualitative research has been conducted. This qualitative research consists of two parts: literature research and case study research. The selected case is the municipality of Rotterdam, one of the four big cities in the Netherlands. Based on this research it can be concluded that instruments can influence the willingness to move by making residents aware of push and/or pull factors, creating pull factors, influencing the evaluation of the current situation, reducing transaction costs of relocating and influencing the evaluation of the new situation. Instruments that influence the triggering mechanism, e.g. push factors and pull factors or awareness of these factors, have priority over instruments that influence the evaluation mechanism, e.g. evaluation of the current situation, transaction costs of relocating, and evaluation of a new situation.