What is a buy-to-let remortgage?
A buy-to-let remortgage means replacing your existing rental-property mortgage with a new one, either with your current lender or a different one. Landlords do this for two main reasons: to secure a better rate when an existing deal ends, and to release equity from a property that has grown in value to fund the next purchase. It works much like the original mortgage — the same rental stress test applies — but there is no purchase, so the process is usually quicker and more predictable.
Why do landlords remortgage?
Beyond simply chasing a lower rate, remortgaging is a core tool for running a portfolio. Common reasons include:
- Rate switch: moving off a lender's standard variable rate onto a new fixed or tracker product when a deal ends.
- Equity release: withdrawing cash from a property that has appreciated, often to fund the next deposit.
- Restructuring: moving a property into a limited company, or changing the term to improve cash flow.
- Consolidation: refinancing several properties or moving to a lender with more capacity as a portfolio grows.
How does equity release through a remortgage work?
If your property is worth more than when you bought it, you can remortgage to a higher loan and take the increase as cash, up to the lender's maximum LTV. For example, a property bought at 200,000 pounds with a 150,000 pound mortgage that is now worth 260,000 pounds could support a new loan of around 195,000 pounds at 75% LTV — releasing roughly 45,000 pounds, subject to the rent passing the stress test. That released equity is a tax-efficient way to fund your next deposit, a strategy at the heart of most growing portfolios. Our guide to portfolio landlord mortgages explains how this fits into scaling up.
What do lenders assess on a remortgage?
A remortgage is underwritten much like a purchase. The lender revalues the property, checks the rent against its stress test and ICR, and confirms the new loan sits within its maximum LTV. If you are a portfolio landlord with four or more mortgaged properties, they will also run a background stress test across your whole portfolio. The rental stress test is usually the binding constraint — if rents have not kept pace with values, you may not be able to release as much as the LTV alone would suggest. See our guide to the rental stress test and ICR.
When should you remortgage?
Start the process around three to six months before your current fixed or discounted rate ends. If you let a deal lapse, you roll onto the lender's standard variable rate, which is usually much higher and eats into your rental profit. Starting early gives time for the valuation, legal work, and any stress-test complications to be sorted so the new deal completes seamlessly. Many products let you lock in a new rate months ahead, protecting you if rates rise in the meantime.
What does a buy-to-let remortgage cost?
Costs are generally lower than a purchase because there is no stamp duty and often no full conveyancing chain. As a general guide:
- Arrangement fee: often 1-2% of the loan, or a flat fee, sometimes added to the balance.
- Valuation fee: for the lender to confirm the current value.
- Legal fees: some remortgage products include free legals, otherwise modest conveyancing costs apply.
- Early repayment charge: payable if you leave your existing deal before its fixed period ends — always check this before remortgaging.
How do you arrange a buy-to-let remortgage?
Because rates, LTV caps, and stress tests vary so widely between lenders, shopping the whole market matters — the difference between a good and a poor remortgage can be substantial over a five-year fix. Assesr packages your remortgage into a lender-ready credit paper in around 60 seconds and matches it to specialist buy-to-let finance lenders offering the best fit for your rent, LTV, and structure. You pay nothing until completion — just the 0.5% Assesr Fee on drawdown, a quarter of the typical broker fee.
Frequently asked questions
Why do landlords remortgage a buy-to-let?
The two main reasons are to secure a better rate when a fixed period ends and to release equity for a deposit on the next purchase. Landlords also remortgage to move a property into a limited company, extend the term, or consolidate borrowing. Timing a remortgage well can materially improve cash flow and fund portfolio growth.
Can I release equity by remortgaging my buy-to-let?
Yes. If your property has risen in value, you can remortgage to a higher loan amount and withdraw the difference as cash, subject to the lender's maximum LTV and the rental stress test. Many landlords use this released equity as the deposit on their next property to grow a portfolio without adding new savings.
When should I start a buy-to-let remortgage?
Begin around three to six months before your current fixed or discounted rate ends, so a new deal is in place before you slip onto the lender's higher standard variable rate. Starting early leaves time for valuation, legal work, and any stress-test issues to be resolved without a gap.