With the growing need for vertical expansion in modern cities, high-rise buildings must be designed to withstandlateralforces, especially those resulting from seismic events. Outrigger and wall-belt systems have emerged as effectivestructuralsolutions to enhance the performance of tall buildings under such loads. This study presents a detailed investigationintotheoptimal location of a single outrigger and wall-belt support system in a G+20 storey reinforced concrete buildingsituatedinSeismic Zone III of India. Using CSI ETABS software, six different structural configurations (OTS1 to OTS6) were modeledandanalyzed to evaluate parameters such as lateral displacement, base shear, bending moments, and axial forces. Theresultsdemonstrate that placing the outrigger and wall-belt system at the third floor level significantly improves the building's lateral loadresistance. The findings offer valuable insights for structural designers aiming to enhance the seismic resilience of tall buildings.Keywords: Outrigger system, Wall-belt support, Seismic load resistance, High-rise building, Lateral displacement, ETABS analysis