Office vacancy is a growing problem in the Netherlands. In the first half of 2012, office vacancy continued to grow to 7,62 million square meters, 15,4% of the total office stock. Demographic trends (decrease of the workforce), changing ways of working (telecommuting), decreasing immigration and technological innovations (continued automation) may give an even bigger rise to a strong reduction in demand for office space. The situation is clear that office vacancy is an enormous challenge for building owners dealing with non-rentable space and municipalities having to deal with the degradation of areas due to lack of liveliness. The report researches the topics of office transformation, flexibility and student housing. The design project tries to find a solution to the increasing vacancy rates, by offering a sustainable, flexible and customizable system which can be applied to standard size office buildings. The system is applied to 'De Pionier' in The Hague.