Sustainable construction in the Nigerian construction industry: unsustainable practices, barriers and strategies

Purpose Sustainable construction practices are strongly correlated with a profitable and competitive construction industry, improved client satisfaction and efficient use of resources. However, due consideration is not being given to sustainable construction practices in Nigeria. Therefore, this study aims to identify the unsustainable construction practices on construction sites, the barriers to sustainable construction and possible strategies to improve sustainable construction in Nigeria. Design/methodology/approach A questionnaire survey of 50 construction sites was conducted with construction professionals on the sites as the specific target, out of which only 43 construction sites have at least a construction professional present at the site. Forty-three filled questionnaires from the respondents were used for descriptive (mean score, standard deviation and charts) and inferential analysis (t-test and Kruskal-Wallis) in this study. Findings The study shows that a large percentage (75%) of construction professionals in Nigeria are aware of sustainable construction. The descriptive and inferential analysis showed a disparity in the ranking of the 12 unsustainable practices, 14 barriers and 11 strategies among the respondents. Five unsustainable practices ("negative externalities", "excess energy", "unsustainable technologies", "non-management of health and safety of workers" and "material waste"), six barriers to sustainable construction ("absence of historical data and exemplary projects on which construction professionals can build and learn from", "lack of professional to handle the task", "poverty and low urban investment", "lack of urban and construction policy", "lack of awareness" and "lack of technical know-how") and three strategies to improve sustainable construction practices in Nigeria ("cooperation, partnership and participation", "protection of biodiversity and conservation of natural resources" and "sustainability assessment system") were found to be significant. Practical implications The study offers significant insights into the construction industry unsustainable practices, barriers to sustainable construction, as well as strategies for improving sustainable construction practices. These insights can be applied to other developing countries with an emphasis on geographical differences. Originality/value To the best of the authors' knowledge, this is one of the recent studies in Nigeria that explored the context of sustainable construction in the construction industry by providing insights into the unsustainable construction practices, barriers and strategies to improve sustainable construction in Nigeria.