The cost of BIM modeling based on the laser scan is also higher due to the expensive BIM software, highly skilled professionals who create the model, and the time for modeling itself is higher than the conventional CAD drawings creation. However, assessing the bigger picture, it is noticeable that the BIM model contains a lot of information which was previously stored in different places, copied a lot of times, and lost during the information transfer process. All of the errors caused by these factors are eliminated with BIM modeling. High-quality BIM models created once can be evolved during the building life-cycle, new information is added to them with time and it is the only true source of the information. Therefore, a lot of time is saved for information collection, transfer, copying, searching in different locations, let alone the errors caused by clashes which are not detected in CAD drawings but easily detected during the clash detection procedure in the BIM modeling.