Olasunkanmi Ezekiel OLAGUNJU2025-10-032025-10-032023-12Kate TurabiaM.Schttps://repository.lcu.edu.ng/handle/123456789/1150Energy efficiency is a critical aspect of sustainable development and has gained significant attention in recent years. Public facilities, such as governmental buildings, sports complexes, educational institutions, and healthcare centres, account for a substantial portion of energy consumption. Therefore, assessing and optimizing the energy efficiency of these facilities is of paramount importance in achieving sustainable energy goals. This research aims to assess and evaluate the energy efficiency of public facilities through a comprehensive study. The primary objective is to identify the key factors that impact energy consumption and propose effective strategies for energy optimization. The study explores various aspects, including building design, equipment efficiency, occupant behaviour, and energy management systems. The research employs a mixed-methods approach, combining quantitative data analysis and qualitative assessments. Energy performance indicators, energy audits, and simulation models are utilized to evaluate the energy efficiency levels of selected public facilities. Energy consumption patterns are analysed to identify areas of improvement and potential energy-saving opportunities. Additionally, detailed surveys and interviews are conducted with facility managers and occupants to gain insights into occupant behaviour and preferences related to energy usage. The findings of this research will contribute to a deeper understanding of energy efficiency in public facilities and provide valuable recommendations for stakeholders involved in facility management and policy-making. The proposed strategies aim to enhance energy performance, reduce energy consumption, and mitigate environmental impact while ensuring occupant comfort and productivity. This study serves as a foundation for future research and policy development in the field of energy efficiency in public facilities. Keywords: Energy efficiency, Energy performance, Occupant behaviour, Public facilities Word Count: 252enEnergy efficiencyEnergy performanceOccupant behaviourPublic facilitiesThesis