The exterior is an inwardly sloping dome, with slate silver fish scale tiles. There is also several white lines running vertically down amongst the tiles. On the edges is metal gutters around the base of the dome. On either side is a semicircular window, with a short white overhang, a white grill, and green metal gates for decoration.
The interior has cream pink wallpaper, with no distinct designs. The floors are made up of series of overlapping dark oak rectangles. In the center of the room is a circular pink rug, with a black and pink flower design along the edges. The room is entered through a wooden trapdoor, which has a dark oak border around a birch center. Upon entering her room, Marinette's bed is to the right. Her bed has pink sheets with white polka dots, a white wooden frame, and white triangular legs. The bed also has a curved red headboard, with a white border. Resting upon the headboard is a similarly styled pillow and umbrella.