How to show it about capital gain investment & also claim rs.35k

I sold my bangalore property and the capital gain is 35 lakhs during year 2014. i have paid the tds as rs.35000/= to it dept for 35 lakhs during the year 2014.i am now constructing a new house but this property is in my wife's name. since i am investing my capital gain money for this new house construction purposes. important point to note is that the civil contractor wants me to pay only by cash or by self cheque and not by cheque in his name or by dd as this will invite service tax of 14.5 %.he says that i could pay by cheque / dd if i could pay the service tax charges of 14.5% additionally along with the agreed construction amount.so this is causing a worry for me as i am unable to show any kind of proof to the it dept to show that i am investing my capital gain amount for this construction.kindly advise me what should i do to show it dept that capital amount is utilized for this purpose so that i could get the tds amount reimbursement from it dept. the main concern is that this new property is in my wife's name. kindly advise me as i am doing the investment. hari - [deleted]