This review explores the integration of renewable energy sources (RES) in building systems to achieve sustainability and reduce carbon emissions. The study identifies key design principles and strategies for enhancing energy efficiency and analyzing the potential of RES such as solar, wind, geothermal, and biomass. It also examines recent developments in hybrid renewable energy systems, energy storage solutions, and AI-based technologies. The research emphasizes the importance of sustainable building practices, energy efficiency, and the integration of renewable energy technologies to reduce the carbon footprint of buildings. The study highlights the need for comprehensive research in this area, focusing on the challenges and opportunities associated with integrating RES into various building systems. The review discusses the role of building orientation, envelope design, energy efficiency measures, and energy monitoring and management in achieving sustainable buildings. It also explores the integration of solar technologies, including building-integrated photovoltaics (BIPV), and the potential of hybrid energy systems. The study concludes that the integration of renewable energy sources in buildings is essential for achieving a low-carbon built environment and contributing to global sustainability goals. The research provides valuable insights and practical recommendations for achieving regenerative, carbon-neutral buildings that align with global sustainability targets.This review explores the integration of renewable energy sources (RES) in building systems to achieve sustainability and reduce carbon emissions. The study identifies key design principles and strategies for enhancing energy efficiency and analyzing the potential of RES such as solar, wind, geothermal, and biomass. It also examines recent developments in hybrid renewable energy systems, energy storage solutions, and AI-based technologies. The research emphasizes the importance of sustainable building practices, energy efficiency, and the integration of renewable energy technologies to reduce the carbon footprint of buildings. The study highlights the need for comprehensive research in this area, focusing on the challenges and opportunities associated with integrating RES into various building systems. The review discusses the role of building orientation, envelope design, energy efficiency measures, and energy monitoring and management in achieving sustainable buildings. It also explores the integration of solar technologies, including building-integrated photovoltaics (BIPV), and the potential of hybrid energy systems. The study concludes that the integration of renewable energy sources in buildings is essential for achieving a low-carbon built environment and contributing to global sustainability goals. The research provides valuable insights and practical recommendations for achieving regenerative, carbon-neutral buildings that align with global sustainability targets.