This study explores the implementation of Lean Construction (LC) within a Hungarian small- and medium-sized enterprise (SME) specializing in precast concrete manufacturing. It addresses the critical need within the sector to reduce inefficiencies and operational losses. Hungarian construction SMEs encounter considerable obstacles in adopting LC, primarily due to limited financial resources, inadequate investment capacity, a lack of collaborative supply chain integration, uncertainty towards mutual benefits, and minimal client support for process innovation. The research utilizes a thorough evaluation of Lean tools, such as Value Stream Mapping (VSM) and the Ishikawa diagram, to assess their effectiveness in optimizing workflows, minimizing waste, and enhancing productivity within the SME context. The findings of this study are expected to provide actionable insights for integrating LC methodologies to illustrate the potential to enhance the triple-helix goal of sustainability, flexibility, and cost-effectiveness within a construction industry case study. This study can support the broader adoption of lean philosophy among SMEs as they navigate digital transformation and competitive pressures.