Nowadays, building has provided by soft storey or weak storey. This feature is not suitable for building situated earthquake prone reason. In this study effect of soft storey in different height, different section of beam and columns while keeping their area constant. The determinations of percentage stiffness, maximum bending moment, maximum Shear force. The analysis is carried out by STAAD. Pro V8i. Here the present works (problem taken) are on a G+9 storied regular building. These buildings have the plan area of 15 meter x 15 meter with a soft storey height of 2.1 meter & 2.5 meter at first floor, and 4 meter constant height above first floor in all models. Depth of foundation is 2.5 meter, and the overall height of chosen building including depth of foundation are 40.6 meter & 41 meter. The analysis has done on computer with the help of STAAD. Pro V8i software using the parameters for the design as per the IS-1893- 2002-Part-1[B] for the Bhopal area and the post processing result obtained has summarized. It is concluded that from this study that the column section 200 mm x 450 mm is more suitable than, square column whose section is 300 mm x 300 mm, and a circular column whose diameter 340 mm. This is finding out on the basis of their area constant with different section.