Hi Joeedbkk
Looks like you are building in the Baan Balina development ??
If it is............We looked there several years ago and was impressed with the design and the finished product but the Thai developers where difficult to get an answer out of - this was post the 2008 credit crunch when Channotes (land titles) were being held by the banks as the developers were in a lot of strife - so effectivley you owned a house with no title to the land until the developer paid up the bank - not an ideal situation.
Also happened to us with another developer out the back of Bang Sare
Might still be happening..
Back in those days, the Balina development was on reclaimed land surrounded by a wet season swamp so my advice would be to ensure your house and garden drainage is adequate and the storm water drains run off site.
Definitely connect the car port to the house !
If it's not still do the roof between the carport and the house