This paper presents the process of product construciton and design on the example of a model of a collapsible garage system. The paper is divided into two parts – theoretical and analytical The first part of the paper defines the basics of design theory and the steps that follow the process of product design in which the activities of designer are listed. Based on analysis of existing solutions, a list of requirements has been adopted, which defines the requirements that foldin – assembly garage must acomplish. The morphological matrix defines the principles of solving individual partial functions on the basis of which three product variants are defined. The evaluation of variants as a basis for the selection of the most favorable of the three proposed variants was also performed. In order to carry out quality techno – economic evaluation, it is very important to collect a large amount of important information and precisely define the goals we went to achieve. The functional structure of the product was made for the selected variants. In the second part of the paper, a 3D CAD model of an innovative solution of collapsible garage system is made and described, including the design and the principle of operation of typical details. Analytical and numerical calculations of the load-bearing structure were performed, taking into account the action of snow and wind, as well as the own weight of the structure. A cylinder calculation was also performed including the required flow and capacity of the cylinder pump.