REALIZE, under its existing grant with the US Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE), has conducted a market assessment of high performance, prefabricated retrofit technologies in the United States and the Netherlands. This report seeks to identify products in the European and US markets that can enable a more integrated and standardized approach to conducting zero-energy retrofits by leveraging off-site construction and manufacturing. Greater integration of energy conservation measures into prefabricated building components will further enable efficiency adoption, while reducing project complexity, risks, and costs.