Structural pounding often occurs between neighbouring buildings in earthquake-prone cities during seismic activity. This research aims to avoid the pounding impact by strategically positioning the added elastic spring components in the neighbouring structures. An essential cause of the pounding phenomenon is the occurrence of vibrations that are out of phase between nearby structures. A pair of adjacent, varying-height structures are simulated as shear buildings in order to establish the proposed methodology. The objective function to be minimized is the relative displacement, which refers to the horizontal displacements of nearby buildings at the top level of the shorter building. Furthermore, an examination is conducted to analyze the decrease in relative displacement between the buildings and the impact of different vibration characteristics on each structure. This analysis is based on transfer functions. The equations of motion for a structure, which are independent when each component is analyzed separately, become interconnected when stiffness factors are included between the neighboring structures. The initial mode response of the structures is taken into account while deriving the transfer function response. Optimal designs are calculated for various overall stiffness levels and distinct vibration characteristics of adjacent buildings. The numerical calculations demonstrate that good designs significantly reduce the relative displacements between adjacent buildings. Optimal designs are compared to the uniform design in the absence of elastic spring instances. The numerical calculations demonstrate that the suggested optimum elastic spring design approach in this work is very successful in preventing the collision of adjacent structures.