The process may be a little complex and time-consuming but that's where Creditfina loan advisory service can be of help to you. NOC from your existing lender is required as unless you close your account with the previous bank, another bank will not entertain you as a prospect.
However sometimes a home loan switch is needed, especially where the saving in interest are substantial between the two lending institutes. The Bank you switch your account to, will treat you as a new customer and require you to complete all the documentation afresh and follow the same procedure all over again. Additionally, on every loan transfer you may be required to pay certain processing fees to your new lender that may range from 0.5% to 1.5% of the sanctioned amount.