The evaluation based on both site inspection and structural calculation to represent the seismic performance of building in terms of the seismic index of structure IS and seismic index of nonstructural elements IN is called seismic evaluation. The seismic performance is evaluated by checking its ultimate strength capacity and deformation capacity. There are three different levels of screening methods to find the seismic capacity of RC buildings in Japanese standard and guidelines. In this study, the first and the second level of screening methods are used to evaluate an existing RC building in Nepal. After the evaluation, it was found that the first and second floors are judged as unsafe in both directions. For retrofit, optimum techniques shall be adopted. In this case shear walls with two boundary columns are installed. After retrofitting, again, analysis is done by using STERA-3D software. The result is compared as the second screening versus push over static (before and after retrofit) and dynamic analysis (before and after retrofit). The criteria of seismic capacity based on Nepalese standard are proposed by comparing Japanese and Nepalese standards.