This research investigates behavior of wheelchair users in a built environment, and how this environment should be developed to accommodate needs of disabled people best. The concept of this study is based on ecological viewpoints: materials, surfaces, the space and atmosphere they create, and the persons' perception of the whole. It is estimated that a proper balance between the space, the form and the surface is vital to ensure free activities by its users. Besides, it is important places where they can do with intent, for example: watching TV or smoking place. This research is useful to consider universal design, and it is need to research comparatively on ordinary persons.