The objective of this study is to develop the real estate housing project in the year 2021 and to study the design of real estate housing project for Bangkok and the metropolitan. This is a qualitative research, which consists of 2 phrases. The first phrase is the study by document analysis and in-depth interview with consumers looking to buy houses in the Bangkok and metropolitan area. Second phrase is the study by data analysis technique of the housing consumer demand, together with strategic cite forecast techniques. It is found from the study that 1) the concept of developing the housing project in 2021 is a detached house for the elderly and family. There will be a smart home suitable for two ages, middle-aged and elderly. It emphasizes on the importance of environment and inside facilities of the house, where the problem of polluted air PM 2.5 could be reduced. 2) The design of real estate housing project for 2021 consisted of 5 components: First component is the project style and location, consisted of project type, size of the project, location of the project, pricing, reputation of the operator and other services. Second component is the physical characteristic of the housing project, consisting of physical characteristic of the house, style, lay out of a house and the design of the house to be of a contemporary home. Third component is the interior design, consisting of an overall design of living room, dining area, kitchen area, bedroom, bath room and installation of electrical equipment. Fourth component is the layout of the common area, consisting of the club house, public parks, housing project management office, the environmental and utilities management, security system and management system when it becomes a Juristic Person. Fifth component is the design to be a smart home, consisting of security management, energy and resource management, convenience and comfort management, health and wellness management, and media entertainment.