European International Journal of Science and Technology Vol. 2 No. 3 April 2013 239 PERFORMANCE OF BUILD-OPERATE-TRANSFER PROJECTS: RISKS’ COST IMPLICATIONS FROM PROFESSIONALS AND CONCESSIONAIRES PERSPECTIVE Amusan Lekan* Murtala Building Technology Department College of Science and Technology, Covenant University, Cannanland, PMB 1023 Ota. Nigeria (lekan.amusan@covenantuniversity.edu.ng ) 234-(0) 8030743025 Joshua Opeyemi Building Technology Department College of Science and Technology, Covenant University, Cannanland, Ota. Nigeria Oloke C. Olayinka Estate Management Department Department College of Science and Technology, Covenant University, Cannanland, Ota. Nigeria *Correspondence Author Abstract Determining cost implication of risk factors on performance of Build Operate Transfer (BOT) projects is a major focus of this study. One-hundred and seventeen structured questionnaires were used to collect information randomly from the respondents which made up of professionals such as Builder, Architect, Quantity surveyor and Civil engineer. Content analysis was carried out on the responses for validation; data were further analyzed with Mean Item Score using Risk Mean Index and validated with regression analysis. Meanwhile, the most common risk to all the projects executed are inflation, variation to works, change in government policy and fluctuating nature of foreign exchange with inflation being the highest on rating scale of 0.1 to 1.0 with corresponding cost implications and years. Against the background of the research outcome therefore, cost and time is used in this context as a model typifying the extent of risk implication experienced on the projects. Keywords: Performance, Concession, Risk, Transfer, Concessionaire 1.1 INTRODUCTION One of the major emerging projects financing system is Build-Operate-Transfer (BOT). It enables client to have access to fund for construction on event of fund insufficiency. It involves financing partnership between a private and government with parties involved receiving concession on design, planning, funding, execution and management of a project. The system provides an opportunity for a project to be managed after completions to enable the proponents recover the sum invested in the project. The need to execute project effectively and given the high cost of execution of environmental projects necessitates government sourcing of private initiative. In the case of this type of arrangement, private undertakes the project funding before being transfer to the government (Chege and Rwelamila(2000), Zhang 2005).