46 The assessment of life cycle costing for sustainability of building projects in the South Eastern states of Nigeria ARTICLE INFO Artcle history: Received August 11, 2021 Received in revised form August 29, 2021 Accepted September 27, 2021 Available online 0ctober 11, 2021 ABSTRACT The research work is on the assessment of life cycle costing for sustainability of building project in the South Eastern states of Nigeria. The broad objective is to assess the life cycle costing for sustainable building projects in the South Eastern states in Nigeria. The specific objectives are to examine the impact of life cycle costing on cost profile of building projects; to develop the optimal usage of life cycle costing analyses for sustainability of building projects in South Eastern Ni- geria. The researcher used survey design and Ex post facto research design for the research. The use of survey research method makes the data generated directly from respondents to be more distinct and finite whereas the Ex post facto research design is gathered from an already existing data site. The ordinary least square (OLS) regression technique was adopted in examining the impact of life cycle costing on cost profile of building project. The result of the study indicates that life cycle costing has significant impact on the cost profile of building project, with the mean value of the estimated total cost as 120234000 and a corresponding standard deviation of 0.92013. The researcher recommends that sustainable life cycle costing have significant impact on the cost profile of building project, there is need for the stakeholders in the building industry to empower the proper use of life cycle costing in their building cost profile so as to enable them have proper check and accountability of any problems in the building. Keywords: Assessment Building project Costing, life cycle Sustainability. Corresponding Author’s E-mail: kriscjaycee2007@yahoo.com https://doi.org/10.36265/arejoen.2021.040207 ISSN ONLINE – 2736-139X PRINT – 2736 - 1403 © Publishing Realtime. All rights reserved. Department of Quantity Surveying, Enugu State University of Science and Technology, Agbani, Enugu State, Nigeria , Department of Architecture, Enugu State University of Science and Technology, Agbani, Enugu State, Nigeria Department of Quantity Surveying, Enugu State University of Science and Technology, Agbani, Enugu State, Nigeria 1.0. Introduction 1.1. Background of the Study The global trend today in the construction industry is for the procurement experts to consider at inception and design stages, the application of life cycle tools in arriving at the estimated total cost of projects up to and including the eventual end of its useful life. About 40% of the world’s resources energy use is linked to the construction and maintenance of buildings. These concerns can be addressed by the sustainable construction practices, which is more sustainable than current practices. Sustainable Life Cy- cle Costing for commercial buildings are environmental- ly responsible and resource-efficient throughout a struc- tured life cycle. Assessment of Sustainable Life Cycle Costing of buildings can be introduced at any stage of construction, from design to demolition. Ideally, the impact of the built environment should be addressed on a life cycle basis, from the origins of the construction material, through the manufacture and installation of the resources, to the eventual deconstruction of the building, (Allen and lano, 2004). The nation can save a lot by Obieze Joseph C., Prof. A. O. Nwagbara, and Dr. Nnadi, Ezekiel O. E. Obieze et al. Arejoen Vol 4(2) 2021, 46-53