In this project, we will develop a system of computer-assisted, automated workflows to specify, manufacture, and install panelized retrofit systems, focusing particularly on panel joints and interface detailing between the panels and facade openings. The proposed system will substantially decrease the time and expertise required for site-specific design and reduce the required expertise and labor hours from contractors and installers on-site. These reductions in labor effort will thus reduce the disruption to building occupants and the total cost of panelized retrofit projects: two key barriers to retrofit adoption. In addition, the improved dimensional accuracy of on-site measurements and quality of panel fit will increase the energy performance and durability of the retrofits.