Structures having open ground storey (OGS) are certainly sought after because of their operational advantages. However, the safety of such structures is somehow compromised in order to harness functional benefits. While there are proposed techniques to enhance the safety of OGS structures, these methods often prove challenging to implement, expensive or result in a reduction of the structures’ functionality. Even the predefined factors for OGS columns have been found insufficient in mitigating the soft storey effect. In this current study, efforts have been made to address the stiffness deficiency of OGS structures, yielding marginal improvements over conventional construction practices. The study investigates the stiffness variation of OGS structures based on varying bay number and width, and determines the magnification demand by OGS columns. Unlike some national codes that prescribe a constant magnification factor (MF), our approach varies the required MF for OGS columns based on different structural configurations. The analysis employs various linear and nonlinear methods, as well as static and dynamic approaches. We propose a relationship between the required MF for OGS columns and different structural parameters, resulting in significantly improved outcomes. Importantly, the technique we propose is not only easy to implement but also effective in mitigating the stiffness irregularities of OGS structures.