The paper deals with the design of a building (G+14) and later extending it to (G+18) with the help of IS Codes and designing tools such as STAAD Pro using retrofitting techniques to ensure the quality and safety control along with compliance with the latest designing standards. The main objective of a civil engineer is to understand the effect of various external loads on a building. Cities nowadays are also seen as concrete man-made jungles which are hazardous when under extreme external loads and are left vulnerable to natural disasters which will lead to multiple casualties. With an aim to reduce this impact, the first part of our study will be concerned with analysing the impacts of various earthquakes in the Indian subcontinent through which we can identify seismic failures. This will also include the study of Base isolation techniques which for reducing the impact of disaster. The second part of the study was to analyse and design a multi-storey (G+14) building using STAAD Pro in zone 4. The final part of our paper deals with the how the vertical extension of same building by four floors (G+18) can be done by re-design the structure. Based on re-design as per latest Codal provisions, the requirement of retrofitting was identified by the hit and trial method and this technique has been adopted to make the building safe against any disaster.