Now that we have all the quotes for the work we want to do to our house, we now know how much extra we need to borrow to complete the work next year spring/summer.
Our current fixed mortgage rate will come to an end In March 2019. At that point, LTV will be 57% which means we can pick a 60% LTV product. Assuming house prices fall off the cliff due to brexit.
My confusion is what happens next. I understand that we can go for the extra borrowing anytime now, if we want. And that we then end up with 2 mortgage products at the same time. So if we say, decided to borrow the extra amount just after the remortgage of the original amount, how do they decide what rate? The extra amount pushes the LTV to 71%. Would that mean that we end up with two mortgage products one at 60% LTV and another at 75% LTV? Or have I got it all wrong and that we would need to apply for a whole new mortgage to cover the whole mortgage(original + extra borrowing) with an overall LTV OF 75%?