Residential mortgages are designed for owner-occupiers, who will be living in the property as their main residence. If you want to rent out a property, you will need to apply for a buy-to-let mortgage, which is specifically designed for this purpose. The main difference between the two types of mortgage is the way in which the loan is assessed and underwritten by the lender and also how it is regulated. A buy-to-let mortgage lender will typically base their decision on the rental income potential of the property, whereas a residential mortgage lender will consider factors such as the borrower’s income and credit commitments. It’s important to note that if you obtain a residential mortgage with the intention of renting out the property, you could be in breach of your mortgage terms and potentially face legal action.