You may incur several costs when changing lenders, including:
An appraisal fee may be necessary to confirm the value of your mortgage property
New lender setup fees, such as registration, discharge, transfer and/or assignment fees from your current lender
A fee to cover the removal of any collateral charge on your mortgage from the current mortgage and subsequent registration of the new one (this will require you to either clear the debt or transfer all loan agreements that you secured using the collateral charge to the new lender)
Other administration fees
It’s a good idea to ask your new mortgage lender whether they will pay for some or all the costs incurred during the switch.