A young family and the challenge of offering them a quality space with a limited budget; a deep space and an irregular conformation of the perimeter deriving from the diagonal intersection of the streets facing the building: these are the starting data and the limits that the project has interpreted to transform them into opportunities. The new planimetric organization has allowed to obtain a sleeping area as regular and functional as possible, transferring the irregularity in the living area, an open-space of a triangular plan organized in functional areas (entrance, dining area, kitchen, living area). Here the main role is played by the close dialogue of two elements, the supporting structure of the bare concrete building and the natural fir bookcase, arranged diagonally to it. If on the one hand the structure bipartizes the space by offering a visual anchorage, on the other the library unifies it, causing the gaze to look at it. This counterpoint accentuates the dynamism of the composition and the sense of depth of the space.