Project cost estimates that are accurate and trustworthy are critical in determining whether to proceed with the construction activities. As it involves requests for proposals, cost estimating, contract negotiations, scheduling and levelling, and othe...
Project cost estimates that are accurate and trustworthy are critical in determining whether to proceed with the construction activities. As it involves requests for proposals, cost estimating, contract negotiations, scheduling and levelling, and other activities, cost estimates are utilised to get the funds required. Depending on time constraints and the availability of cost data, cost estimators employ a variety of estimation methods and approaches. Cost estimator experience is required, as well as consideration of the identified potential risks that must be updated. This will have an impact on the accuracy of cost estimations. The heritage building is one of the national real estates and its conservation measures often receive attention especially with respect to financial allocations. This study was made to highlight the challenges in producing cost modeling conservation work and two historical buildings have been selected as case studies. Observation techniques, interviews, and document analysis were used to obtain the data. Findings show that it is critical to creating an accurate, thorough, and reproducible cost estimate for cost modelling for conservation works. Therefore, it is hoped that this study can be used as a reference for problem-solving that occurs as well as references for relevant research in the future.