This study presents an innovative simulation-based optimization tool to select the minimum cost mix of building technologies, in a typical existing household with at least one vehicle, under different energy market scenarios. The proposed approach considers in its solution scheme the integration of building performance improvements, local renewable energy generation, and possible Electric Vehicle (EV) adoption with vehicle-to-house (V2H) technology. The method was applied to a prototype single-family building and resulted in relevant minimum cost solutions for a cycle of 20 years. The findings make the proposed methodology useful for the research realm, for the market, and for policy makers.