The Marolles, a lively district in the heart of Brussels, is the subject of a series of housing developments framed under the Sustainable Neighbourhood Contract. In this context, Haute 275 focuses on the urban regeneration of a traditional urban block. A challenging goal within a superurban framework: to achieve a harmonious cohabitation between city functions: housing, working space, education and sports. For that purpose, the proposal colonizes the street front and top of the CPAS building with the housing volumes while maintaining a free access to the sports hall at the back. At the same time, a series of public urban scenarios take place along the plot, densifying the block and creating a dialog between public and private spaces. An open-plan workshop pends from the ceiling as the meeting point between both spatialities. All of it is contained by a dynamic window pane aimed to engage pedestrians into a new typology of urban fabric.