Now it seems about 2 bitcoins for one house. But it reallly depends on place where you want to build and, of course, how big is the house which you need 
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.2 BTC for one house? In which place this exists?
In my country I need 15 BTC to buy it. If I can do it or 2, then I am going to move on your country.
Depends on where you live. That amount of Bitcoin could build you a cheap solid home in a good rural area. 2BTC is about $20,000. The most important thing is having a roof over your head, whether it cheap or not doesn't really matter as long as it's safe to dwell in. You could even make the environment beautiful with plants and nature for free.