(1) Is the Builder Buyer Agreement is necessary for the Home Loan since the Mr. B has already sale deed of the above plot?
Answer: if the property of Mr. B are all in order and there are no discrepancies in is title then you have nothing to worry. But you should approach the Registrar if any builder agreement was registered or no;
(2) How i can get the copy of Builder Buyer Agreement or the confirmation that no Builder Buyer Agreement was executed at that time from the Ansal build well ltd.?
Answer: This is my response:
a. approach the builder and give a written letter to request the builder agreement, wait for him to reply;
b. If he does not give the same to you, you can file an RTI (can be done online);
c. If you don't get response file a request to the Registrar and try to retrieve it from there;
d. It is Mrs. A's responsibility to ask for the builder agreement or a xerox copy of the same, otherwise her title is also faulty;
e. Convince Mrs.A and Mr. B to join you in sending a legal notice to the builder;
f. If there is no builder agreement, then file a suit for specific performance;
g. If Mr. B has a the perfect title to the property then nothing to worry, but still the chain of documents should in place for ready reference to subsequent buyers.