Adaptation process of a child in pre-school is influenced by many environmental factors as well as factors that result from individual psychical conditions of the child. To create an ideal environment that supports adaptation of a three- -year-old child in pre-school it is necessary to integrate all aspects that involve fulfilling the child’s needs and guarantying his/her harmonious development. After all, the adaptation takes place at very important moment when the child is “separated” (for some time) from home and beloved parents. One of the environmental factors is a building – the pre-school area. Space that is at child’s disposal includes: play room – daily room, toilets, cloakroom, halls that connect all other rooms, playground, room designated for resting and recreation rooms. All these constitute architecture of the pre-school building along with its surroundings, interior design, fitting-out of premises and space at the disposal of children.