Due to rapid urbanization and economic growth there is huge demand for construction of building. Since population density is high it led to construction of buildings on sloping ground, but this sloping grounds like hilly areas are more prone to earthquake which causes severe damage of life and property. The buildings constructed on hilly areas are different from buildings constructed on flat ground buildings on hilly areas have horizontal/plan, vertical, torsional, mass and many more irregularity. The structure irregularities are considered as one of the main fundamentals of its failure. Here we have done seismic analysis of a G+9 regular RCC building, C and I shape building of floor height 3m resting on sloping ground of horizontal angle of inclination 45o on zone II, Response spectrum analysis is done for three cases that is plain building and building with shear wall and bracings for all the three buildings, after analysis the response of the structures with respect to variation in the story drift, story displacement, base shear, story shear has been recorded and will be discussed and concluded.