In this thesis the question, how can buildings that no longer serve their original purpose be reused for a new typology in a sustainable way, is worked out and given answers. It will be explored through the typology of a recreational depot. The theoretical premise/unifying idea that pushes the research is that, buildings, when repurposed create less waste and that the buildings create opportunities. The justification for this projects is, when buildings are repurposed the decrease in waste material due to not demolishing the building is good for sustainability. The thesis contains a narrative explaining why reusing buildings is important and that principles must be set up for the proper act of repurposing a building. The client for this project is the Lake Wobegon Trail Association, and the users are the general public of the central Minnesota area. Major project elements include a marketplace, observation area, workshop, gallery, offices, bicycle parking, and changing rooms. The site for the project is Saint Joseph, Minnesota, located along the Lake Wobegon Trail. In the thesis the emphasis will be on the principles that designers should follow when reusing buildings; discovered through the use of multimedia, drawing and models. A mixed method, quantitative qualitative analysis design methodology will be used through a concurrent transformative approach. Data will be compiled digitally and uploaded to the universities institutional repository.