A prefabricated structure comprises a shell including a shell frame and an extension including an extension frame deployable from the shell. The shell frame comprises a floor support, a roof support and a plurality of columns extends between the floor support and the roof support, the plurality of columns including a “C” channel. A plurality of vertical structures extends between the floor support and the roof support, the vertical structures including a “C” channel. The extension frame comprises a floor support, a roof support and a plurality of columns extends between the floor support and the roof support, the plurality of columns including a “C” channel. The prefabricated structure further comprises a plurality of panels including an “L” channel extending from a side, the “L” channels receivable within the “C” channels so that the panels can be associated with the shell or the extension to form an outer wall.