The sustainable economic design aims to meet the need for environmentally sustainable housing that provides thermal comfort without depleting energy and resources. This paper proposes a methodology for achieving an economically sustainable residential model that optimizes energy uses and maximizes resource efficiency to achieve the best environmental performance at the lowest possible economic cost. The theoretical foundation of this research paper explores the relationship between sustainable housing and reducing economic costs and climate-appropriate treatments for residential buildings in hot, dry regions. And in its practical section, the research paper addressed an applied study for evaluating and developing one of the housing models in Egypt's hot, dry region, that is The National Housing Project. By testing the effect of different climate treatments on thermal comfort and the economic cost of using the study model in the long term. This was carried out using the simulation and modeling program (Design Builder) to achieve an economically sustainable residential model that achieves maximum energy and resource efficiency and the best environmental performance at the lowest possible economic cost. To achieve the objectives of this research paper, the study relied on both inductive and deductive methods in the theoretical and analytical aspects and applied those methods using simulation software. The research concludes by extracting the results and proposing appropriate recommendations to reach an economically sustainable housing model in Egypt's hot, dry region