This thesis compares the impact of two different construction methods on time and costs of building construction. Building used for comparison have same purpose and meets all the criteria regarding functionality, stability, durability and owners wishes. In order to make comparisons of influences of building technology on costs and time of project, in concept phase it is necessary to plan construction costs, time of activities and resource allocation. Planning methods are explained in theoretical part of this thesis. In the practical part, a construction model of the building is presented in two ways: In the first case, it is built with load-bearing walls and semi-prefabricated „monta“ ceiling, while in the other case the supporting structure is made of reinforced concrete columns, beams and slabs. Costs are calculated for both cases and relationships of cost-effective activities are shown. When calculating the duration of activities, the PERT method (Program Evaluation and Review Technique) was used and the probability of execution for both cases was presented. Scheduling plans were made for both cases. Both cases are presented in form of gantt-charts, workflow histograms and cash flow curves. After the calculations, the results of both cases were compared and shown with their advantages, disadvantages and possible changes in order to remove those disadvantages.