If the value of your property has increased since you purchased it, this is a good thing for a buy to let remortgage as your loan to value will be more.
You’ll have the option to leave your equity in and potentially qualify for a better interest rate or to do a buy to let capital raising remortgage to take the money out.
If the value of your property has decreased since you purchased your property this could be problematic during a remortgage application as your loan to value ratio could take you above the 75% or 80% maximum that is allowed on a buy to let remortgage.
Your mortgage broker will help guide you here and recommend the best way forward.