ETABS stands for Extended Three-dimensional Analysis of Building Software. ETABS is commonly used to analyse Skyscrapers, steel & concrete structures, low- and high-rise buildings. This project presents design and analyse G+26 storey office building using ETABS software. While designing all the forces that induce on the building were considered and in Post analysis of the structure, maximum shear forces, bending moments, maximum storey displacement, behaviour of building to seismic force, storey stiffness, storey drift and other reactions are computed. Then analysis of foundation on CSI SAFE software and reinforcement detailing in CSI DETAIL software has been completed.