With 3 growing children, the family living in this former duplex was beginning to feel cramped. The new addition, combined with a complete interior re-design, allows the family to enjoy a renewed and refreshed living space. A large vestibule, with abundant storage space and a long built-in bench, leads to a spacious and generous living space oriented towards the backyard. In the hallway leading from the vestibule to the living room, an access to the client’s office separates the working space (including a 2nd bathroom) from the rest of the house. A large patio door on the south-west facade offers the dining room, living room and kitchen a superb view into the garden and lots of natural light. A skylight above the interior staircase enlivens the brick and stone of the original house walls, exposed on the full height of the house. Next to the staircase, a small alcove office was built using restored wood from the original house. On the top floor, the 4 bedrooms are organized around a large open space and connected to the existing washroom, to a new laundry room and to storage spaces. The mansard roof of the addition gives a modern and original touch to the garden faced and avoids the need to provide a new roof basin to the existing roof.