This study aims to analyze the role of Quality Control in enhancing customer satisfaction by managing building defects in Lippo Group construction projects. Building quality is a key determinant of customer satisfaction, as it relates to safety, comfort, and the alignment of the finished work with the company's established standards. The study employs a qualitative method using a case study approach. Data were gathered through direct observation during a practical internship (KKP), review of company documentation, and analysis of inspection records, Unit Handover Reports, Unit Repair Reports, and the Quality Control System (QCS). The collected data were analyzed using the interactive analysis model developed by Miles, Huberman, and Saldaña. The results indicate that Quality Control is implemented systematically through final inspections, defect identification and logging, supervision of contractor repairs, and verification prior to unit handover. This process effectively reduces the number of defects, accelerates repair follow-ups, and ensures that every unit meets the company's quality standards. Consistent quality control implementation also positively impacts construction quality, reduces rework, and boosts customer trust and satisfaction. Thus, Quality Control serves not only as a quality management process but also as a vital strategy for maintaining construction quality and enhancing customer satisfaction within the property industry.