This comprehensive study explores the integration of sustainable practices throughout the various phases of a buildings lifecycle, including construction, operation, and maintenance. It emphasizes the pivotal role of material selection, construction techniques, renewable energy integration, energy management systems, retrofitting, water conservation technologies, predictive maintenance, and efficiency monitoring in minimizing environmental impact while enhancing efficiency. Advanced materials such as high-performance concrete and bio-based insulation, alongside innovative construction methods like modular and prefabricated components, are highlighted for their potential to significantly reduce carbon footprints and energy consumption. The study further investigates the adoption of renewable energy systems, demonstrating their efficacy in achieving energy self-sufficiency. Through the operational phase, it underscores the importance of sophisticated Energy Management Systems (EMS) and retrofitting existing buildings with energy-efficient technologies. Additionally, it delves into the incorporation of water conservation technologies, which substantially decrease water usage and associated energy demands. The maintenance phase is discussed with a focus on predictive maintenance using IoT sensors and AI, alongside the use of sustainable materials for repairs. Quantitative analyses throughout the study illustrate potential reductions in energy consumption, carbon emissions, and water usage, underscoring the critical role of these practices in promoting sustainability in the construction industry. This study aims to provide a holistic view of sustainable building practices, offering valuable insights and methodologies for industry professionals and stakeholders.