Buy-to-let remortgages

A buy-to-let remortgage replaces the existing mortgage on a rental property with a new one, either a new product with the same lender or a loan from a different lender. Landlords usually remortgage when an initial fixed or tracker period ends, to avoid moving onto the lender's standard variable rate.

The new lender assesses the property and the rent afresh, so a remortgage is treated much like a new application. The property is valued again, the rent is tested against the new loan and the landlord's wider portfolio may be reviewed if they own several mortgaged rentals.

The most common time is the end of an initial deal, when the rate would otherwise revert. Landlords also remortgage to raise money for another purchase or for works, to move from a personal name into a different structure, or to switch from repayment to interest-only or back again.

A product transfer with the existing lender can be simpler, because there is often no new valuation or legal work. A remortgage to a different lender opens up the wider market but involves more checks. Comparing both is common, and how pricing differs between them is covered on the buy-to-let mortgage rates page.

Releasing equity from a rental means taking a larger mortgage than the one being repaid and keeping the difference. It is often used to fund a deposit on another property, to pay for improvements or to reduce other, more expensive borrowing. The new loan has to fit the lender's maximum loan-to-value and pass its rent test at the higher amount.

Equity release in the retirement sense, a lifetime mortgage, is normally only available on the borrower's own home, not on a rental. Landlords searching for equity release on a buy-to-let usually mean a capital-raising remortgage. Raising money for a further purchase links closely to the buy-to-let deposit rules a new lender will apply.

Lenders check the current value, the rent and the tenancy, the borrower's income and credit, and any other mortgaged property. The rent must cover the interest at the lender's stress rate, which the PRA expects to be at least 5.5% for most products (PRA Supervisory Statement SS13/16, accessed 20 Oct 2026). Higher borrowing needs higher rent to pass.

Landlords with four or more mortgaged rentals are usually assessed as portfolio landlords, which means a business plan, a schedule of properties and cash flow for the whole portfolio. Lenders also check that the property is let on a suitable tenancy and that any licensing needed for the property type is in place.

Lenders also look at how long the borrower has owned the property. Some will not remortgage a rental bought within a short period unless the purchase price is used as the value, which matters to landlords who have added value through works and want to raise money on the new figure.

The cost of remortgaging includes any early repayment charge on the current deal, product and valuation fees, and legal costs. Many remortgage products include a free valuation or standard legal work, but the overall saving depends on the fees as well as the rate. Leaving a fixed rate early can make switching expensive.

Comparing the total cost of each option over the new deal period gives a fairer view than the rate alone. A broker who arranges buy-to-let remortgages regularly can compare product transfers and new lenders on the same case and set out the fees for each one.

Timing the application helps avoid paying the standard variable rate for any period. Many lenders let a new offer be agreed several months before the current deal ends, and a product transfer can often be booked in advance in the same way, so the switch happens on the day the old rate expires.