The rapid growth of urban infrastructure has increased the demand for safe and economical multi-storey residential buildings. This mini project focuses on the analysis and design of a G+3 reinforced concrete residential building using STAAD.Pro software in accordance with Indian Standard codes. The structure is modeled as a three-dimensional frame, and loads such as dead load, live load, and seismic load are considered as per IS 875 and IS 1893 provisions.The building components including slabs, beams, columns, staircases, and footings are analyzed and designed using the limit state method. STAAD.Pro is used to obtain bending moments, shear forces, axial forces, and deflections. Manual calculations are also carried out for selected elements to verify the accuracy of software results. The study demonstrates the effectiveness of STAAD.Pro in structural analysis and design while ensuring safety, stability, and serviceability of the structure. Staad Pro has a very interactive user interface which allows the users to draw the frame and input the load values and dimensions. Then according to the specified criteria assigned it analyses the structure and designs the members with reinforcement details for RCC frames. We continued with our work with some more multi-storeyed 2-D and 3-D frames under various load combinations. Our final work was the proper analysis and design of a multistorey G + 3 residential building