Dear Archana,
As you said, "After the death of the father, the son1 can transfer the property in his name on the basis of the will.' Since property is freshly owned by father, do son1 has to registered it again on his name (like stamp & land registration)?
If son1 starts building home at such land and after some time father has decided to make new WILL and give some land to another son2 then what will previous son1 will do? It's completly loss of money by him.
Suggest me how can son1 get full assurance of it so that he can start building home on that land. Here, chances are very complicated (if, WILL get changed by father after some time).
Regards
Ashish