This study conducts a comprehensive analysis of rainwater harvesting (RWH) efficiency concerning distinct roofing materials, specifically comparing concrete and tile-covered roofs. RWH strategies were applied to two separate detached residences in Aydın, Turkey, representing varied roof scenarios. Tailored prototype RWH systems enabled precise performance evaluation. Hydrological data and municipal water usage statistics were analyzed to measure RWH effectiveness. Hydraulic principles governing system components are outlined. Results indicate the implemented RWH system significantly enhances water reuse, aligning with sustainable goals. Circular and cost considerations provide a holistic view. This study advances RWH understanding, highlighting material influence on system performance and contributing to water management progress.