This project explores sustainable redevelopment strategies for vacant heritage. It explores the opportunities for stakeholder participation in heritage activities, the importance of which is stressed by, i.e., UNESCO, the Faro Convention, and the Cultural Heritage Agency of the Netherlands. The project experiments an innovative systematic approach for heritage façade redesign, filling the academic gap between participatory design approaches and heritage building redesign. It employs a combination of methods structured by sets of divergent and convergent phases. Innovative methods of cognitive mapping and 2,5D model game are tested in the research respectively for inquiry and design testing, the two key participatory stages. The research outcomes include locals' initial perceptions and remembrance of the site. The key findings are the common ground and reasons in their scenario preferences, which lead to the final redesign on creating Sensitive Surface, Inclusive Core, and Attentive Home. In this way, the redesign meets locals' functional, spatial, and psychological demands, thus being well perceived and inteprete by them. Locals would like to come to the site, meet others, and enjoy themselves. The isolated building would then be transformed into a great joint in the community, maximising the social and community values.