Can anyone give me some idea of how much will charge a builder to build a downstair bedroom with 1 bathroom western style ? The bedroom will be an extension to the existing house of my FiL. All build should be around 5x3,5 m including the bathroom. Location is close to Ubolratana in north east of Thailand ( Khon Kaen area). I want to have brick walls. Or do you reccomend other type of walls ? Also where i can find how much cost building materials ? I need to have an idea to not be ripped off by builder. Any other advice is most then welcome