As global temperatures rise due to the greenhouse effect, achieving thermal comfort in residential buildings becomes increasingly challenging. In Egypt, where summer temperatures soar, addressing indoor environmental conditions is crucial. This study investigates the efficacy of solar chimneys as a passive design strategy to enhance natural ventilation and thermal comfort in low-rise residential buildings. Through Design builder commercial software package simulations and thermal behavior analysis, the study evaluates the impact of retrofitting existing service courts into solar chimneys in a typical low-rise multi-apartment building in 6th of October city, Giza, Egypt. The results demonstrate significant improvements in indoor air temperature and airflow velocity after the implementation of solar chimneys. By converting service courts into solar chimneys, indoor cross-ventilation is enhanced, mitigating the greenhouse effect induced by continuous solar radiation exposure. The study showcases the feasibility and effectiveness of passive treatments tailored for specific climatic conditions, providing insights into sustainable building practices in hot, arid regions. These findings contribute to the advancement of passive design strategies and offer practical solutions to enhance indoor environmental quality while reducing reliance on mechanical ventilation systems. Previously, southern zones experiencing temperatures up to 36.83°C saw significant reductions, now averaging between 29.47°C to 30.52°C, aligning with thermal comfort standards. And, average air velocities increased to 0.62 to 1.59 m/s, enhancing natural ventilation and airflow circulation across all building floors
 Ultimately, the integration of solar chimneys presents a promising approach to achieve thermal comfort in low-rise residential buildings, aligning with sustainable development goals and promoting environmentally conscious.