Adding to mortgage

[wpfklaur]

We are wanting to borrow some money against the house for home improvements, is the only way this can be done is by remortgaging? Or can we add mid term?

You don't need to remortgage, you need to request "additional borrowing". Contact your mortgage company. You might be able to do this online. Reduced rates may be available if you are installing energy efficiency measures. They will stress test you can afford the additional payments.