This handbook is designed to serve as a comprehensive guide tailored to managing construction projects within the unorganized sector, which is often characterized by small-scale, informal operations that lack structured management practices. This handbook places a special emphasis on emerging economies, where the unorganized sector plays a significant role in the construction industry. This book aims to provide a robust foundation in construction project management by covering essential principles and practices necessary for effective project management. It focuses on offering practical solutions and strategies to improve project delivery, cost management, and operational efficiency within the unorganized sector. Additionally, the book emphasizes sustainability and the integration of innovative technologies, promoting green practices and digital transformation. By adopting a holistic approach, it incorporates socioeconomic considerations, stakeholder engagement, and capacity building to foster improvements across the sector. Real-world case studies and examples are included to illustrate the successful application of various methodologies and highlight lessons learned. Content from this book can also be used to supplement classroom teaching for courses related construction project management and the building construction profession aimed and practicing building engineers, construction professionals and even architects. The contents of this book will be useful to researchers, academics, and practitioners alike.