Thailand houses come in all styles, shapes and sizes. There are the traditional Thai wooden homes, the modernized version of a traditional Thai style; Mediterranean style, Bali style, minimalist, cottage, ranch, Italian, and so the list goes on. Current (January 2023) construction costs in Thailand, are lower than many other countries. It has allowed people to let their creative ideas flow and with the right architect, many varying styles of home have been created. To start the ball rolling you need to know your legal position and status regards owning a home; so seek a good lawyer to help you. Once you know you are able to build a home then seek the advice of a professional architect in Thailand. Then see a professional builder in Thailand.
If you want to build a house in Thailand use a professional contractor and /or project manger with experience. Good luck in your journey.