It is well known that shear deformations are of paramount importance in the planar (2D) analysis of shear wall systems, both for strains and stresses, so they should be included in the analyses of such systems. Shear deformations are also included in 3D analyses of shear wall systems; however, to the authors' knowledge, the impact of shear deformations on the 3D behavior of structures has not been previously assessed. This paper presents a study where the impact of shear deformations of wall systems in the location of centers of rigidity or torsion (CTs) and static eccentricities (e s) of shear wall buildings are assessed, comparing to the results when shear deformations are not included. It is shown that shear deformations associated to the rotational degrees of freedom of walls impact the location of CTs and e s , therefore, the aspect ratio of the walls (h/L) is an important variable to consider for these systems. Also, for these systems one cannot define an elastic vertical axis, this is, a geometrical locus of the elastic centers of rigidity of the floors, even for systems with the same distribution of walls in all floors.