Located at the corner of des Oblats avenue and Montmagny street, Perché contribues to the respectful and slow densification of Saint-Sauver neigborhood by replacing and old and disaffected storage facility. Arranged in an orthogonal and regular pattern delicately jostled by the slight shift in volumes, the traversing units are distributed around a common courtyard. The facades, articulated by recessed masonry frames, are punctuated by the alternation of solids and voids created by the openings. The canopies mark the entrances to townhouses that are away from public sidewalks through to the few steps that assume the threshold with the building. The dwellings are organized around a vertical circulation shaft in the center of the floor area which distributes the rooms and sequences the levels of privacy. The top floor, set back from the main facade, is a terraced exterior room that offers a breathtaking view towards the upper town of Quebec. The corner unit, distributed over four levels, allows the transition to lower buildings on Montmagny street : its mezzanine, carefully designed and generously fenestrated, is protected from overheating by awnings which frame the profile of the facade. The carriach porch (porte-cochère) reinterprets the traditional archetype of the annex building which is so typical of the architecture of the neighborhood. Above, a common bicycle storage has been provided to reinforce healthy lifestyle promoted by commuting and urban living.