The recent transformations connected to the ecological recycle of dismissed urban materials are the focus of this work, which collects the emerging issues of contemporary and future design. Land Stocks, reserves of land, is the name that describes the new operational landscapes of city and territory, a resource for urban transformations, made of residual areas, wastelands, got stuck in the middle of the spread city or in the compact urban fabric of post-industrial contexts, like landscapes left out of development. The Land Stocks are not invented today. They are a figure of the post-crisis city. They express the weakness of the metropolitan model and the need to investigate alternative transformation strategies. Such as recycling the existing urban fabric in order to bring this land capital back into the urban life cycle.