The expandable container house is an upgraded version of the flatpack container, designed to maximize living space through a dual-side expansion mechanism. When in transport or storage mode, the structure remains compact, with foldable roofs, walls, and bases neatly secured on both ends of a 20ft or 40ft flatpack frame. Upon arrival at the site, these sides can be effortlessly unfolded and interconnected, instantly creating additional usable area. For example, a standard 20ft flatpack container typically offers only ~14 Square meter of floor space, while its expandable counterpart delivers a spacious ~36 Square meter -over double the area-making it ideal for residential, commercial, or temporary accommodation needs.