Welcome to the RADCO website. We hope that you will find the information you need quickly and easily. If you need additional assistance, please contact us. Founded in 1967 as a service oriented engineering company, RADCO established its test laboratory and listing capability in early 1970. Additionally, RADCO provides plan check and inspection services for factory built structures (including recreational vehicles) under numerous federal and state programs which recognize third parties. RADCO is one of the largest independent third party agencies in the HUD manufactured home program.