The Twin House project is presented by the Nook Architects studio in Barcelona, Spain. Two adjacent apartments are located on both sides of the staircase and have been combined into a single living space. There is a bedroom, bathroom, dressing room and kitchen in one part of the residence while a living room, second bedroom and bathroom are presented in the opposite part. Designers have left creative wooden beams and reinforced them with steel elements; concrete floors are complemented with wooden inserts, which are present as pieces of furniture and also are widely used in the decoration. The whole apartment is designed in bright colors and there are almost no bright decorations, so it makes the apartment quiet, simple and stylish at the same time.