The thesis is aimed at the role of Construction Management Professional to minimizingrnmaterial wastage in building construction projects in the case of Addis Ababa. The mainrnfocuses of the paper is to identify the existence of building materials wastage and vividlyrncomprehend the extent of material wastage in building construction sites. It is also thernintent of the thesis to show the causes and effects of the material wastage in buildingrnconstruction and come up with conclusion and recommendation to minimize wastagernwith regard to the role of construction management professional.rnThe methods employed for the thesis were; literature review, questionnaire followed byrninterview for further clarification, site visits to take measurement and observation.rnVarious literatures locally available were reviewed and several web sites searched.rnQualitative data collection techniques are used.rnThe thesis affirmed the existence of material waste in the building construction. 86.96%rnof the respondents have agreed the existence of material wastage in the respectivernprojects. The observation on sties and assessment of archives reiterates the existencernof material wastage. The thesis ascertained; design, procurement, material handling,rnoperation, residual and sub-contract types are sources to cause material waste. It alsorndepicted the extent of material wastage is significant. The economic impacts of materialrnwastage are found to be very high that greatly contribute to the expensiveness ofrnbuilding cost which currently observed.rnFinally; the thesis clearly defined the role of the Construction Management Professionalrnto minimize material waste. The role is explained dividing in to two stages; the role ofrnconstruction management professional at pre- construction and construction stage. Inrnthe final analysis in the case of Addis Ababa; Construction Management Professionalsrnare expected to play the great role to minimize material waste in building constructionrnproject staring from inception to execution.rnKey Words; Material, Wastage, Minimization, Role, Professionals, cause and effect