As society moves toward greater sustainability, the global building sector is leading the way in adopting green construction. Even though Sri Lanka is now going through an energy and financial crisis, the building sector can grow because of green building ideas. It is advisable to consider a building’s Life Cycle Cost (LCC), which comprises cost characteristics related to operations, replacement, maintenance, and demolition. Thus, the primary goal of this research is to determine which component in a green building has the biggest influence on LCC and to offer ways to lessen that aspect’s influence to further minimize LCC. A questionnaire was used to poll the relevant authorities, enabling a thorough examination of the research. This employed quantitative analysis to corroborate findings and provide recommendations based on feedback from several construction industry stakeholders. The research shows that the cost data for LCC that is most impacted is the replacement cost. Additionally, to eventually minimize LCC, this study offered solutions for cutting costs in sustainable building. By considering the financial implications of the green construction concept, this research study will be pertinent to Sri Lanka’s efforts to address the present economic issues.