'Graft' in architecture refers to any designs added to existing or neglected structures, reinvigorating tired spaces with new life. Instead of dismissing these spaces as simply 'functional', graft in architecture values them for their potential and shows how we can turn negative spaces into opportunities to breathe new life into architecture. Along with the Design Research & Innovation Laboratory (D-Lab), Professor Jin-Ho Park highlights four projects and the process involved in grafting, from conception to fabrication, along with plans, drawings, and photographs detailing every aspect and consideration. Using inventive ideas and experimental approaches, Professor Park demonstrates the benefits graft in architecture can bring to any space.