As we (I) wanted a place that was fairly small and economical (my budget is 1 million baht for the land plus the house), I searched on TD and found DD's posts on free house plans.
This house is based on the 2 bedroom one bathroom plan here: http://teakdoor.com/construction-in-...aht-house.html (Thai House Plans - 500,000baht House)
The carport area is now a room inside the house, and I am adding a roofed 'porch' area out front. This is for me to sit outside, drink beer and shout obscenities at passers by.
I reckon the cost of the house will be 750,000 baht by the time we are finished, then add in the price of the land then that's my 1 million baht budget.