Soil structure interaction effects must be considered in the design of all important facilities such as industrial structures etc., particularly when the contribution of significant modes in the dynamic analysis is at high frequencies/low time periods (say T = 0 to 0.5 s). In many real life problems majority of design offices consider the effects of translational springs whereas the effects of rotational springs are often ignored. This may be based on the assumption that application of translational springs also contribute indirectly to the rotational effects. However FE model based on translational springs alone remains an approximation and thus such models do not represent the rotational spring stiffness effects in totality and hence the effect of the same on the overall foundation system needs to be investigated. In the present study, an attempt has been made to obtain the effect of rotational springs on the response of a raft foundation. The results of a detailed 3D FE model, considering the soil structure stiffness effects based on the impedance function approach as per ASCE 4–16 are presented both for translational springs of only the FE model and also considering spring stiffness of all translations and rotations at each node of the base raft of the FE model. The nodal stiffness is derived based on the contributory areas. Finally, conclusions are drawn based on the obtained results of the above FE models. The foundation raft response is validated with available analytical solutions in literature.