The process of sustainable design involves creating structures with environmentally friendly techniques and resource-efficient materials, influencing various stages of a project's lifespan, particularly architectural design. Although time management, performance, and quality are critical aspects of construction projects, existing methods often fall short of fully integrating the principles of sustainable project management. Recognizing the growing importance of both time management and sustainable development in the construction industry, this study delves into their interconnected roles in effectively managing project time, quality, and cost throughout the project lifecycle. The study centers on a case study of residential projects in the United Kingdom, examining the requirements of sustainable design. Simultaneously, it explores the current state of sustainable construction practices in Egypt, aiming to develop a specialized time management program for these projects during the design phase. By investigating the real-time project management processes in residential complex projects, the study seeks to understand their impact on sustainable project management and identify solutions that align with sustainability principles. The objective is not only to analyze and utilize sustainable management systems and methods as tools for meeting sustainability requirements but also to provide recommendations for the implementation of sustainable project management in Egypt. Ultimately, the study envisions a comprehensive understanding of the relationship between time management and sustainable development, strengthening regulatory frameworks for governments to continually update regulatory frameworks to incentivize and mandate sustainable design practices. This includes revising building codes, zoning laws, and environmental regulations to keep pace with the latest developments in green building.