Pounding is the phenomenon where adjacent tall buildings collide with each other during seismic excitation due to insufficient provision of separation distance between the adjacent buildings when they vibrate out-of-phase, i.e. towards each other. It has become one of the major covert causes of structural damage during seismic events. In this paper, a rigorous analysis of building frames is conducted by employing both response spectrum and nonlinear time history analysis to investigate the pounding effect between different medium height buildings. Both material and geometric nonlinearities are considered in time history analysis to predict more accurate building behaviours in the form of building deflection. For the purpose of analysis, two buildings of different heights, i.e. 4-storey and 8-storey buildings are considered. Seismostruct (ver. 2023) software is used for modelling and analysing the two building frames. Based on the analysis, it has been observed that the codal provision of separation distance, as per IS 1893(Part 1):2016, is found within permissible values if response spectrum method is employed, however the codal provision needs further investigation if nonlinear time history analysis is employed.