The best practice case studies on sustainable buildings in India and Australia highlight shared values, including improved energy efficiency, integration of renewable energy, low emissions, and productive work environments. Sustainable building materials and community engagement are increasingly prioritised, reinforcing the vital role of stakeholder inclusion in advancing sustainable built environments. The case studies reveal distinct focuses in each country: in India, there is a strong emphasis on reducing operational carbon emissions, while in Australia, the trend is toward reducing embodied carbon and using sustainable building materials. This chapter explores the common themes and unique movements shaping the built environment in both nations, showcasing cross-learning opportunities and the urgent need for more affordable technology and supply chain solutions to accelerate the transition to sustainable built environments. Looking ahead, the chapter suggests that regulations for sustainable built environments and sector-specific practices will be essential for significantly reducing carbon emissions.