Recently, many cases of building construction design errors had been investigated. The concrete quality had not satisfied the requirement. There is no need to dismantle the constructions, several structural strengthening methods can be considered, in this case the structural elements of columns strengthening respectively: reinforced concrete jacketing (RCJ) and steel jacketing (SJ) was necessary. This research had performed the comparison study of reinforced concrete column strengthening method by numerical analysis. The prototype is hospital reinforced concrete building that was located on seismic zone area. The 3D single RC column model had been idealized in 3D solid idealizations by utilizing Abaqus. Some parameters had been observed in this research, such in: column strength capacity increasement, column section geometric, and seismic resistance. The nonlinear analysis had been performed in this research by utilizing Riks methods. The numerical cyclic test also had been conducted in this research to evaluate the hysteresis curve of the column. The results showed that 3 strengthening methods had similar strength capacity increasement; 1531% (RCJ); and 1727% (SJ). This research also showed that the RCJ had highest stiffness. In another hands, the SJ had highest seismic capacity among another column strengthening methods.