Clients are incresingly demanding the use of BIM tehnology, which is becoming essential for successful complition of building project. The economical crises forced the Construction industry to a more precise design and construction methods in terms of end-user needs, quality, costs and duration. In the thesis, I demonstrate building project optimization for one-family house. Building has three stories, totaling to a 352m2, out of which approximately 100m2 are in the top floor. Using BIM tools I created a 3D building model, and upgraded it with additional dimension of time (4D) and cost estimation (5D). Parametric model of the building was created in ArchiCAD in which I also made a list of quantities of materials and visualization. Project scheduling and cost estimation was done in Vico Control. For the purposes of optimization of the project schedule, I divided the building into inividual zone that were used for flow-chart and related redeployment of tasks and labor activity. The virtual construction simulation was also created with »Construction Simulation«.