The yard in traditional houses has been a multi-purpose element, responsible for uniting several other elements, organizing spatial connection and diversity, creating open and social space on a family scale, connecting with nature and balance, transparency, fluidity, etc. Is. Today, the rapid growth of Iranian cities in recent decades has quantitatively neglected them in terms of the quality of the yard and open space, this situation has minimized the comfort and quality of homes, today due to the progress made In the field of technology, it is possible to create a flexible architecture that adapts to the changes, an architecture that adapts to the changing needs of its residents. The research method in this research is descriptive-analytical to study and analyze houses built in the Qajar and Pahlavi periods in Arak and find common features related to plant species, water and body structure and landscape elements in the yard in order to create flexibility. Pays outdoors. In traditional Iranian houses, the connection of areas such as energy saving, landscaping and flexibility, etc. has been done, which in recent decades has been raised as a concern of scientists and architects as a fundamental and critical issue in the present world. The results show that the courtyards of ancient houses in Arak have a single structural pattern as well as landscaping elements and vegetation. This study tries to test the efficiency of landscape components in the open space of houses and based on modeling and retrieving the principles and factors of landscaping to find a suitable solution to enhance the flexibility of today's open architecture.