The topic of this master's thesis is „Comparison and analysis of 5D building models and monitoring accuracy in model construction“. The comparison and analysis will be conducted on given examples of two small family house models, built during the course Integrated Design of the academic year 2019/2020 at the Faculty of Civil Engineering and Architecture Osijek. The thesis consists of an introductory, a theoretical and a practical part, which ends with a discussion and conclusion. After the short introduction, the paper investigates the development and application of the BIM concept, its development over a specific period of time as well as its application. In addition to a brief description and visual presentation of some of the computer tools used in BIM, the advantages of using BIM systems are presented, as well as some of its disadvantages. A review of professional literature identified how the usage of BIM system is applicable even in small family house projects. In the practical part, modelling errors based on built small family house models are analysed and structured according to the consequences on project quality up to level 5D. The models were constructed according to 2D documentation, the solutions were compared and the frequency and error type were identified. The identified errors were structured for 3D, 4D and 5D model dimensions. Throughout the discussion, suggestions for the conception of project assignments in order to reduce the possibility of errors, are given.