The rise in demand for sustainable energy in institutional buildings has driven increasing interest in renewable energy solutions, particularly in developing countries. This study assesses the potential and utilization of renewable energy in the building services systems of Federal Polytechnic Bauchi, Nigeria, focusing on lighting, electricity supply, heating, ventilation and air conditioning (HVAC), water supply, and communication systems. A quantitative research design was adopted, employing a structured questionnaire developed through expert review and pilot testing to ensure validity and reliability. Data were collected from 276 respondents, comprising academic staff, technical staff, administrative staff, and students, resulting in a 76.7% response rate. Descriptive statistics were used to summarize the data, while comparative analysis provided deeper insight into variations across service categories. Results indicate that solar power is the most available and utilized renewable energy source, primarily for lighting, electricity supply, and communication systems, while HVAC and hot water services remain underutilized. Major barriers to adoption include high initial costs, lack of technical expertise, inadequate infrastructure, and maintenance challenges. The study highlights the untapped potential for expanding solar, wind, and biomass applications within the institution. Practical implications include guiding facility managers and policymakers in prioritizing investment, capacity building, and infrastructure upgrades. Theoretically, the findings contribute to sustainable energy adoption models by integrating context-specific barriers and potentials in a tertiary education setting. This research advances knowledge on renewable energy integration in Nigerian higher education institutions and offers a framework for scaling adoption in similar contexts.