This is called porting a mortgage, and the lender has to agree to it. If you have a low-interest mortgage, why would your lender agree to this when you sell yo

This is called porting a mortgage, and the lender has to agree to it. If you have a low-interest mortgage, why would your lender agree to this when you sell your current house and want to port it to another house? I guess there is some incentive, because they will still be getting some interest from you, vs if you pay off the loan, they will get zero future interest. But from my experience with lenders, I doubt they would go for this. Now sure, if you have a higher interest rate mortgage, they'd be glad to port that in a lower interest rate market. But then that would be dumb for the homeowner.