Building costs in Thailand - Rural area in Real Estate, housing, house and land ownership Posted February 24 On 2/22/2020 at 6:42 PM, saengd said: These are the rules of thumb that I know of (about three years old): 15k per square metre unfinished. 25K per square metre finished to Thai standards 45k to Western standards 55k to top end standard. I paid 13K per square meter in upper Nan province. The build finished in Feb last year. I'd say my build was far closer to Western standards than Thai standards and have had many comments to that regard. Spend considerable time to get a competent builder and yes indeed, make sure family are not supplying anything or working on it.