Upcycling in construction enhances material efficiency, reduces waste, and improves lifecycle performance key priorities in computational and experimental engineering. Yet in Egypt, practical adoption remains limited. This study applies a comparative, criteria-based evaluation of three residential projects to assess the engineering feasibility and scalability of upcycling: El Hadidi Residential Villa (Egypt), Zaporizhia Home (Ukraine), and Upcycle House (Denmark). Assessment criteria include material reuse rates, energy performance, cost-efficiency, embodied carbon (kg CO₂e/m2), adaptability, waste recovery rates, and material passport coverage. These metrics align with circular economy frameworks from the United Kingdom Green Building Council, the European Union, and Nordic initiatives. The analysis draws on project documentation, performance data, and stakeholder interviews. Results show that the Egyptian project, while innovative, lacks institutional support, design for disassembly, and material tracking. In contrast, the European projects integrate reused materials, adaptable design, and documented circularity performance using databases and carbon metrics. The study highlights the need for standardized circularity indicators. Without measurable targets—reuse percentage, disassembly potential, and embodied carbon—circular practices remain fragmented and difficult to scale. Future work should apply lifecycle assessment, BIM-integrated material tracking, and benchmarking tools. These methods can support engineers, designers, and policymakers in advancing upcycling as a scalable, data-driven practice in residential construction.