Adding a partner to a mortgage

loopingtons

My partner has a mortgage with santander and wants to add me to the mortgage. Its a fixed rate for 3 years which was created/renewed in December last year. As we understand it we would be required to pay £95 to Santander for administration and financial checks and we would be required to get a solicitor and pay any associated costs. Does anyone have any idea what the process is from the solicitor's point of view and the likely costs for such a process?
I have read on here that you can change title deeds using the land registry quite cheaply or employ a solicitor to do this, but I am wondering what else is required if anyone has been through this process and some approximate costs. Many thanks

[Deleted User]

You wont be able to do this yourself as your lender will need their interests protected. DIY is just for mortgage free properties. Id imagine ( just a guess ) it would cost about £300 in solicitors fees to add you by you signing the deed and other bits 
cannot imagine much more apart from any Land Registry fees depending on value  

dl8860

What are the lender's interests in this case? Is there any downside at all from the lender's point of view for someone else becoming responsible for the mortgage?

MovingForwards

The property is their interest (security for the mortgage).

Having the option of going after two people increases the odds of the lender getting their money back in case there's arrears or the property is repossessed.

dl8860 said:

What are the lender's interests in this case? Is there any downside at all from the lender's point of view for someone else becoming responsible for the mortgage?