The term 'BEACH BUILDING' can refer to three different structures: a HUT, CABANA, and deco. A HUT is a small, simple structure made of natural materials such as wood, straw, or mud, and is typically used as a shelter or home. A CABANA is a more luxurious structure, usually made of wood or canvas, and is often used as a changing room or lounge area at the beach. Finally, a deco is a type of beach building that is designed to provide shade and protection from the sun, and is usually made of canvas or other lightweight materials.