Building Information Modeling (BIM) is an emerging concept in architecture, engineering and construction (AEC) industry promising to replace traditional 2D based construction documentation and management procedures and to reduce rework and cost in project execution. The level of information that could be assigned to building objects in BIM technologies could provide vast amounts of benefits to construction projects throughout projects’ life-cycle. Implementation of BIM, however, requires strategic planning to enable achieving these potential benefits. Industry-wide and organizational implementation guidelines and standards have been published around the world either to encourage organizations to adopt BIM or to present the minimum requirements to be followed where BIM implementation is a statutory obligation. In contrast, BIM implementation and/or deliverables has not been mandated by government or organizations yet in Turkey, therefore organizations which plan to adopt BIM processes have to develop their own implementation plans. The purpose of this study is to provide guidance in BIM implementation for construction companies particularly during the construction phase of the building projects. BIM standards and guidelines, and studies related to BIM implementation have been reviewed and important aspects of implementation have been identified. A case study of BIM implementation at a large construction company in Turkey to conduct quantity takeoff and cost estimation are presented and unique challenges of BIM implementation in Turkish AEC industry are discussed.