This thesis analyses the construction course of a commercial building from two aspects: time and cost. A time analysis and a comparison between a contract term plan and an executive term plan as well as the actual execution of the constructional project from the start of the construction until the handover and acceptance are being presented. Reasons for the deviation from the constructional work term plan are stated. It is of the uttermost importance for the contractor to follow the term plan stated in the construction contract. A cost analysis for concrete, metal and mason work, as well as panelling and scaffolding is performed. The analysis contains a comparison between an offer-based calculation and an after-calculation, which complies with the actual cost of used quantities. Reasons for the increase of the contract price of a project are stated at the end.