A building structure and a kit comprising: a hollow shell; a plurality of exterior panel assemblies attached to an exterior surface of the shell, each panel assembly including: a mounting member extending outwardly from the shell, the mounting member having a first end secured to the shell and a second end located away from the shell; an exterior wall panel secured to the second end of the mounting member so as to be spaced from the shell. According to another aspect, there is also provided a building structure and a kit comprising: a hollow shell defining an interior enclosure sized and shaped to house at least one individual; a plurality of modular wall sections secured to the hollow shell inside the interior enclosure.