This paper introduces a twelve-step process for efficient design of structures made primarily via industrial large scale polymer additive manufacturing (ILSPAM). The process amalgamates common design processes and new steps that may be unique to ILSPAM. The design intent is to implement information feedback during low-cost steps (concepts, analysis, CAD, FEA) and iteration prior to slow steps (prototype, test). Researchers have made headway in the last decade in design for additive manufacturing, but literature focuses primarily on design for volumetrically small scale precision parts [1]. Prior literature regarding design for ILSPAM primarily pertains to specific artifacts and prototype demonstrations [2]. This paper expands on that literature to present a design for ILSPAM process which generalizes to a variety of structural products. This design process was demonstrated for dwelling homes made via ILSPAM for un(der)housed people in emerging economies. However, generalizing the 12-step AI driven design process is useful and applicable to other largescale additively manufactured structures for any user group or appropriate application.