Conventional reinforced concrete buildings generally consist of slabs supported by beams and columns. However, flat slab systems eliminate beams and directly transfer loads from slabs to columns, resulting in architectural flexibility, reduced storey height, simplified formwork, and faster construction. This project focuses on the analysis and design of a flat slab system for a residential building using STAAD Pro software in accordance with IS 456:2000 provisions. The flat slab structure is modeled and analyzed by considering dead load, live load, floor finishes, and relevant load combinations. Structural components such as flat slab with drop panels, ring beams, columns, footings, and staircase are designed based on results obtained from software analysis. Critical parameters such as bending moments, shear forces, punching shear stresses, deflections, and column interaction ratios are evaluated to ensure safety and serviceability. The flat slab is designed with drop panels and column heads to enhance punching shear resistance and improve load transfer efficiency at slab–column junctions. Reinforcement detailing is carried out using AutoCAD software in compliance with Indian Standard provisions.The results demonstrate that the flat slab system satisfies strength, stability, and serviceability requirements and can be effectively implemented in residential buildings. The study confirms that STAAD Pro is a reliable and efficient tool for analyzing and designing flat slab structures with accuracy and code compliance.