This review paper addresses a significant knowledge gap in the study of Floor Area Ratio (FAR) and its influence on urban thermal environments in Egypt. Recent policy changes have facilitated increased building heights through the application of FAR, prompting concerns regarding its environmental implications. To investigate the relationship between FAR, building height, and thermal comfort, a deductive approach was employed to analyze existing literature. Key factors influencing thermal comfort and their potential interactions with FAR were identified and analyzed. A review of existing literature reveals two primary approaches to studying the relationship between FAR and thermal performance: -1 Varying FAR Configurations: This approach investigates the impact of different FAR configurations on thermal outcomes. -2 Fixed FAR and Building Height: This approach explores the influence of building height or Building Coverage Ratio (BCR) while maintaining a constant FAR. Understanding the intricate interplay between these factors is crucial for effective urban planning and design. By optimizing urban design strategies, it is possible to enhance outdoor thermal comfort and create sustainable urban environments.