The paper presents and discusses the results of a research on the seismic behaviour of cold-formed steel stud shear walls, sheathed with wood-based (oriented strand board) and gypsum-based (wallboard) panels. Within this activity, this paper provides the outcomes of the results of experimental (capacity evaluation) and theoretical (demand evaluation) phases of the research. Moreover, a contribution is given for the .evaluation of the strength reduction factor of this structural typology.