Development in historic areas is a very sensitive issue because of the importance of these areas and their multiple values of historical, cultural and economic. Development should aim to emphasize and maximize the value of this context and to make possible contributions to address weaknesses. The aim of this research is to investigate the extent to which the role of added development can be maximized in heritage contexts for sustainability. The study hypothesis is discussing the possibility of enhancing the sustainability of historic contexts through an integral infill landscape project based on the potentials of these projects.
A questionnaire was conducted with architects and planners to determine the expected role of this type of development and how much contribution it should role. Case studies were selected to assess the extent to which the infill development in heritage domains could achieve sustainability. An analytical comparative study was done based on qualitative methods by studying the case studies of infill landscape projects that were added and positively affected the historic context.  
The research then proceeds with a set of conclusions and recommendations that can be applied when adding development in historic contexts.