The cost of building a villa in Koh Samui can vary greatly depending on a number of factors such as the size and complexity of the design, the materials used, and the location of the property. Additionally, the cost of labor and permits can also vary depending on the contractor and the specific area on the island.
According to some estimates, the cost of building a villa in Koh Samui can range anywhere from ฿30,000 ($900) to ฿80,000 ($2,400) per square meter. This means that a 300 square meter villa could cost between ฿9 million ($270,000) to ฿24 million ($720,000) to build.
It is important to note that these estimates are just a rough guide, and actual costs may vary depending on individual circumstances. It is recommended that you work with a reputable contractor or construction company who can provide you with a detailed cost estimate based on your specific project requirements. Additionally, it is important to factor in additional costs such as legal fees, permits, and furnishings when budgeting for your villa construction project.