Customer satisfaction is a key priority in the competitive real estate sector, in particular, in Saudi Arabia’s rapidly growing market. This study investigates the impact of service quality on customer satisfaction, focusing on the implementation of ISO 10002:2018 at Makkiyoon Company, a leading firm in the Western Region. Despite the current rapid growth of the real estate industry, the influence of quality management standards on customer satisfaction remains underexplored. This study evaluates the effectiveness of ISO 10002:2018, identifies implementation challenges, and recommends optimized quality assurance practices to enhance customer experience. The research method uses a PRISMA-based systematic literature review from the past decade, sourced from Web of Science, Lens.org , and Google Scholar database, and a tripartite scale analysis of Makkiyoon’s internal documents assessing complaint handling processes. Findings reveal Makkiyoon implemented 83.33% of ISO 10002:2018 standards, with a 16.67% gap due to partial application of five standards, including staff training and complaint resolution timelines. These results offer actionable insights for Makkiyoon and a scalable model for real estate companies to improve trust and service quality. The study contributes region-specific insights to the quality management literature and supports Saudi Vision 2030 and the Sustainable Development Goals, particularly SDG 8 (Decent Work and Economic Growth) and SDG 11 (Sustainable Cities and Communities) by advancing customer-centric frameworks for sustainable business practices.