The research aims at studying the built environment from the point of view of its appropriation by less than eleven-years old children. Aim selecting infor mations needed to plan and design the most pliant and the most appropriate structures for children's and adults' use. This paper is the punt-study carried out in the general context of the above research. - Subject of research four eight-years old children belonging to families of middling-high socio-economic level and living in an urban cultural environment. - Environment of research find out the way children perceive, conceive of, interpret and classify their environment and its elements (Saloniki, 1974). - Method for collecting information from children 1. In the known environment (their own home) : a) Memory drawing of their home's spaces. b) Observation of their behaviour in these spaces. 2. In an unkwnow environment : a) Observation of their behaviour, in the spaces of an unknown house. b) Memory drawing of these spaces. The collected informetions were processed by comparing and correlating between them and the actual state of the environment. As this is a first approach to the research and as the sample is very small, the chief interest of this research lies in its methodology and in the discussion of conclusions.