Hello,
Generally all the banks allow loans on the basis of agreement to sale. However you need to take care of the previous outstanding loan with the bank of the seller.
You can either get the previous loan shifted to your account so that you won't have to take a fresh loan. Or you may ask the seller to settle the previous loan and then get a fresh loan from another bank. In either case the title of the property must be clear. The Builder, You and Bank will enter into a tripartite agreement whereas the original sale deed will be delivered to the bank till the completion of the loan.
You may simply approach the bank from where you want to obtain the loan with all the relevant papers and they will guide you through.
Regards,
