The built environment significantly contributes to environmental degradation and social challenges, particularly in developing countries like Nigeria. This study investigates the barriers hindering the adoption of energy-efficient buildings in Nigeria and to assess the perceived social and environmental implications of their implementation among construction industry professionals. Data were obtained through structured questionnaires distributed to professionals in the construction industry, including engineers, architects, and construction managers. Respondents rated 15 identified implications and 15 hindrance factors using a 5-point Likert scale. The results showed that the most highly rated implications of energy-efficient buildings include improvement in indoor air quality and occupant health, promotion of renewable energy sources, and enhancement of sustainability. Conversely, key barriers include limited access to financing, lack of awareness, and unavailability of reliable data for regulations. A Kruskal-Wallis test was conducted to assess whether perceptions of these hindrances vary by professional background. The test revealed a statistically significant difference, suggesting that engineers, architects, and construction managers differ in their perception of hindrance severity. However, no significant difference was found in their perception of the benefits of energy-efficient buildings, indicating broad professional consensus on their importance. The findings highlight the need for increased financial access, awareness campaigns, and data-driven policy support to scale up the adoption of energy-efficient buildings in Nigeria.