The built environment, the main stage for human life and civilization, must urgently respond to the escalating global demand for safe, resilient, and affordable housing, recognized as a fundamental human right, while simultaneously confronting its staggering environmental footprint. This places the built environment at a critical crossroads between human needs and planetary health. This first of a kind edited collection: Sustainable Materials for the Built Environment, navigates this complex challenge. It presents an exploration of innovative materials, methods, and philosophies essential for transforming how we design, construct, and maintain our world. Moving beyond purely technical analysis, this book champions a multidisciplinary vision where environmental stewardship, social equity, and economic viability converge. Drawing insights from leading thinkers and practitioners from around the globe, the volume bridges ancient wisdom, revitalized through modern science, with cutting-edge advancements in materials and circular design. Ultimately, this work reveals how conscious material choices are fundamental to resolving the interconnected crises of climate change, resource scarcity, and biodiversity loss. By prioritizing materials that harmonize with natural systems, we can create built environments that provide not only shelter, but spaces that actively nurture human well-being, cultural identity, and community resilience.