A system for forming a wall is described. In an embodiment, the panel comprises: one or more prefabricated wall panels each panel comprising: a rear board; a front board forming an internal face for a room, said front board spaced away from said rear board to form a cavity; a first side stud and a second side stud, each side stud connected to the front and rear boards on opposing sides of the cavity; and a head track and a base track, each track connected to the front and rear board and the first and second side stud at a top and bottom of said boards and studs respectively; and wherein the first side stud comprises a male mating means and the second side stud comprises a female mating means such that the prefabricated wall panel can mate with an adjacent prefabricated wall panel to form a continuous internal wall surface.