If you are thinking about becoming a landlord, or growing an existing property portfolio, understanding how buy to let mortgages work is an important first step. The criteria are different to residential mortgages, and lenders focus heavily on the rental potential of the property rather than just your personal income.
As a mortgage broker in Cambridge, we regularly help both new and experienced landlords secure buy to let mortgages. Whether you are purchasing your first rental property, switching your current home to buy to let, or remortgaging to release equity, choosing the right mortgage product is key to making your investment work.
The Buy to let Mortgage Process
A buy to let mortgage is designed for properties you intend to rent out, not live in yourself. Lenders will typically require a larger deposit than for residential purchases, often starting at 20–25% of the property’s value. Interest rates are also usually higher, reflecting the added risk of renting out a property.
Unlike residential mortgages, affordability is assessed mainly on rental income. Lenders apply rental stress tests to check that the rent comfortably exceeds the mortgage repayments, usually with a margin of 125–145%. They may also test whether the mortgage would still be covered if interest rates rose.
Cambridge’s housing market has a reputation for strong rental demand, thanks to its growing economy and excellent transport links. This demand helps make buy to let an attractive option for many investors.
Who can get a buy to let mortgage in Cambridge?
Most buy to let lenders prefer applicants who already own a home, though some are open to first-time landlords. If you are new to the rental market, you may need to provide a larger deposit and show a reliable source of income alongside a clean credit record.
Lenders will also consider any other mortgages you hold, as well as your overall financial position. If you are a portfolio landlord with multiple rental properties, lenders often assess the performance of your portfolio as a whole to ensure it is sustainable.
What types of buy to let mortgages are available?
The two most common repayment structures are interest-only and capital repayment. Many landlords choose interest-only because it keeps monthly payments lower, with the balance usually repaid when the property is sold or refinanced. Others prefer repayment mortgages, which gradually reduce the loan balance and provide full ownership at the end of the term.
Buy to let mortgages in Cambridge are also available on different rate types, including fixed, tracker, and variable. Fixed rates provide certainty with set monthly payments, while variable or tracker rates may be attractive if you want flexibility and are comfortable with possible rate changes.
For specialist cases, limited company buy to let mortgages are available for landlords purchasing through a company structure, and lenders may also offer products for HMOs or multi-unit properties. These usually require a larger deposit and stronger rental coverage but can provide higher yields.
Remortgaging A Buy To Let Property In Cambridge
If you already own a rental property, remortgaging can be a useful way to access better rates or raise funds for further investment. Many landlords remortgage to release equity, which can then be used as a deposit for another buy to let property.
When reviewing a remortgage application, lenders will reassess the property’s value and the rental income to confirm that the mortgage remains affordable. Our mortgage advisors in Cambridge work with landlords to compare options across the market and find products that support their plans.
First Time Buyers Buy to Let in Cambridge
Although most buy to let mortgages are aimed at existing homeowners, it is still possible for first-time buyers to become landlords in Cambridge. These applications are less common and usually require a larger deposit, a strong income, and a solid credit history.
First-time landlords should also be prepared for the additional responsibilities that come with renting out property. Our team can explain both the financial and practical aspects of buy to let, making sure you understand how lenders view your application and what products may be suitable.
Date Last Edited: October 3, 2025
