Existing research into computational methods to optimize material usage in timber building structures often results in highly differentiated structures and individualized members, which have less potential for dis- and reassembly in a circular economy. This research proposes and uses a novel synergetic optimization software that integrates various criteria, including structural design, manufacturing, and space planning. It aims to reconcile opposing objectives (minimizing structural material use and complexity) for a structural kit-of-parts system. By using the software, a balanced design solution reconciles both objectives. Results that show a significant reduction in mass per usable floor area are achieved while only moderately increasing the complexity of the structure and achieving a more robust presence and readability in space.