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Best Let-to-Buy Mortgages 2026

Let-to-buy lets you keep your current home as a rental while buying a new one — remortgaging the old property onto a buy-to-let and releasing a deposit. This guide covers the best let-to-buy mortgages in 2026 and how the two-part deal works.

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Quick Answer: Best Let-to-Buy Mortgages in 2026

Let-to-buy involves two linked mortgages: a buy-to-let remortgage on your current home (often releasing a deposit) and a residential mortgage on your new home. Lenders that handle let-to-buy include Barclays, NatWest, The Mortgage Works, BM Solutions, Coventry and many BTL specialists. The BTL is assessed on rental income (ICR); the residential on your income, with the new BTL mortgage treated as self-financing. A second-property stamp duty surcharge usually applies. A broker coordinates both parts.

Rates last reviewed June 2026. Figures shown are indicative market ranges to help you compare — not live quotes or personalised offers. Mortgage rates change daily and depend on your circumstances, the lender's criteria and the Bank of England base rate. Check live rates for your profile →

How Let-to-Buy Works

The arrangement has two coordinated parts:

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Gary from London

"Easier Than Expected"

Gary, London
★★★★★
"I kept putting off remortgaging because I thought it would be a massive headache. Honestly, the whole thing was painless — filled in a quick form, got my options, and it was all sorted within weeks. Wish I'd done it sooner."
Katie from London

"Done In No Time"

Katie, London
★★★★★
"Our fixed rate was ending in a month and I was panicking about going onto the SVR. Managed to get everything sorted really quickly and we're now on a much better rate. Saving us about £200 a month."
Janet from Exeter

"So Much Better Off"

Janet, Exeter
★★★★★
"Was a bit nervous about switching as I'd been with the same lender for years. Turns out I was massively overpaying — got a much better deal and the whole process was far easier than I expected."
Lucy from Tamworth

"Happy Saving"

Lucy, Tamworth
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"After having to pay a ridiculous amount due to the interest rate hike, we have now got a more suitable monthly payment, consolidated a loan and have money left for hopefully a loft conversion."

Let-to-Buy: The Two-Part Structure (2026)

PropertyMortgage type & assessment
Current home (kept & let)Buy-to-let — assessed on rental income (ICR)
New home (moving to)Residential — assessed on your income
Deposit for new homeOften released from the current home's equity

The elegance of let-to-buy is that the rental income usually covers the old mortgage, so it doesn't reduce how much you can borrow on the new home — letting you move without selling.

How to Set Up a Let-to-Buy

To structure it well:

Best Alternatives and Related Options

Related routes to weigh up:

Important: Your home may be repossessed if you do not keep up repayments on your mortgage. There will be a fee for mortgage advice. The actual rate available will depend on your circumstances. Think carefully before securing other debts against your home.

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Frequently Asked Questions

Let-to-buy lets you keep your current home as a rental while buying a new one to live in. It involves two linked mortgages: a buy-to-let remortgage on your existing home (often releasing a deposit), assessed on rental income, and a residential mortgage on your new home, assessed on your income. Because the rental usually covers the old mortgage, it typically doesn't reduce how much you can borrow on the new home.

You remortgage your current home onto a buy-to-let basis — assessed on the rent it will earn against the interest cover ratio — and usually release some equity as a deposit. You then take a residential mortgage on your new home, assessed on your income, with the let property's mortgage treated as self-financing (covered by rent). A broker coordinates both mortgages to complete together, letting you move without selling.

Usually yes — buying an additional property (your new home, while keeping the old one) typically triggers the second-property stamp duty surcharge, since you'll own two properties on completion. There can be relief if you later sell your previous main residence within the qualifying period, but in a let-to-buy you're keeping it, so the surcharge generally applies. Budget for it and confirm the position with a conveyancer.

Usually not — in a let-to-buy, lenders generally treat the buy-to-let mortgage on your current home as self-financing, meaning the rental income covers it, so it doesn't count against your affordability for the new residential mortgage. This is the key advantage: it lets you borrow for the new home on your income without the old mortgage reducing your capacity, provided the rent comfortably covers the BTL.

It depends on how long you plan to let. Consent to let is your current lender's permission to rent out your home temporarily on your existing residential mortgage — simpler and cheaper for a short-term move. Let-to-buy is a proper buy-to-let remortgage, suited to a longer-term arrangement, and it allows you to release a deposit for your new home. For a permanent keep-and-let, let-to-buy is usually the right route.

Lenders that handle let-to-buy include Barclays, NatWest, The Mortgage Works, BM Solutions, Coventry and many buy-to-let specialists. The buy-to-let side is assessed on rental income and the residential side on your income. Because let-to-buy involves two coordinated mortgages with linked timing, a broker is recommended to align both for a same-day completion and place each with a suitable lender.

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