This document provides a review of construction defects, including their causes and types. It begins by defining construction defects and discussing their negative impacts on cost, duration, and resources. It then reviews literature on previous studies of defect causes, including factors related to design, construction management, materials, and human errors. The document categorizes defects as structural or non-structural. It provides examples of common structural defects like cracks and discusses non-structural defects. Recommendations are provided for minimizing defects during the design and construction phases, including quality management programs, design reviews, coordination between teams, and proper construction methods.