Interior Space and Exhibition Design Mezzanine Apartment Interior Design by Yi-Lun Hsu The mezzanine apartment which the space function is priority in planning is 4.3 meters high. The upper floor is a private area and the lower floor is a public area. Because of adding to the fun of the high space, the main TV wall of the living room is embossed with a 15 degree V-shaped sloping wood. The light scattered from the bay window is evenly covered with the living room. The interior presents a natural green life when the plants can be hung freely on the railing of the second floor which is made of punched-plate.