Let to buy is for people who want to move into a new home but keep their current property and rent it out, rather than selling it. In practice it means running two arrangements at once: refinancing the home you’re leaving onto a buy-to-let basis so it can be let, and taking out a new residential mortgage on the home you’re moving into. This guide explains, in plain English, how let to buy works, who it suits, how the two applications fit together, and the risks to weigh up — so you can get your bearings before you take advice.
This page is information, not advice. It’s here to help you understand the landscape, not to recommend a particular product or course of action. Let to buy combines a home purchase with becoming a landlord, and that carries property, tax and commercial consequences — so before you commit, speak to a qualified Mortgage Adviser who can look at your property finance circumstances properly. Niche Advice Limited is a mortgage and credit broker, not a lender, and is authorised and regulated by the Financial Conduct Authority. Niche Advice Limited does NOT offer tax advice so is unable to comment on your tax position. Tax advice should always be obtained separately via a suitably qualified professional Tax Advisor or Accountant.
Both this sides of the arrangement are generally FCA-regulated unless you already own a buy-to-let so you are NOT classed as an “accidental landlord”.
What this guide covers
“Let to buy” sounds like one product, but it’s really a coordinated pair of moves with several moving parts. Below we walk through:
- What let to buy actually is — the two-application structure, step by step
- Keeping your home and letting it out — turning your current property into a rental
- Releasing deposit equity — using money tied up in your current home towards the new one
- Running the two applications together — how the let-to-buy remortgage and the residential purchase interact
- How it compares — let to buy versus selling, a second home, or a standard buy-to-let
- The realities of becoming a landlord — responsibilities, tax and risks, set out honestly
Each section is short and scannable. You won’t find interest rates, fees or monthly figures here, because those change constantly and depend entirely on your circumstances and the properties involved — for a current quote, speak to a qualified Mortgage Adviser.
What let to buy actually is
Let to buy is a way of moving home without selling the place you already own. Instead of one transaction, it usually involves two that run alongside each other:
- A let-to-buy remortgage on your current home. You refinance your existing property onto a buy-to-let footing so it can be let to tenants. This often also lets you release some of the equity built up in it (more on that below).
- A new residential mortgage on the home you’re buying. An ordinary, regulated residential mortgage on the property you’ll actually live in — like any other home purchase.
People choose let to buy for a range of reasons: holding onto a property as a long-term investment, being unable or unwilling to sell straight away, keeping a home in a familiar area, releasing equity towards the move, or thinking they may want to return to the property later.
The key thing to grasp is that you end up with two mortgaged properties and two sets of obligations — one residential, one buy-to-let. That’s more to arrange and maintain than a straightforward sale-and-purchase, which is exactly why advice is so valuable here.
Keeping your current home and letting it out
At the heart of let to buy is turning your current home into a rental. Most residential mortgages don’t permit you to let the property out indefinitely, so you generally can’t simply move out and start letting on your existing deal. Instead, the property is refinanced onto a buy-to-let basis designed for letting.
A few points worth knowing:
- Letting is assessed on the rent, not your salary. Where a residential mortgage looks mainly at your income, a buy-to-let arrangement focuses on whether the expected rent will support the borrowing on that property. Lenders apply a rental stress test — checking the rent comfortably exceeds the mortgage interest, with a margin to spare.
- You take on a landlord’s responsibilities. Letting brings legal duties around safety, tenancy paperwork, deposits and energy efficiency, plus tax on the rental income — whether you use a letting agent or manage the property yourself.
- The let property is an investment, with investment risks. Rent isn’t guaranteed to arrive every month: there may be void periods when the property sits empty, or times when a tenant falls behind. The mortgage still has to be paid regardless.
Both this sides of the arrangement are generally FCA-regulated unless you already own a buy-to-let so you are NOT classed as an “accidental landlord”.
Releasing deposit equity
One of the practical attractions of let to buy is that it can let you release equity from your current home towards the deposit on your new one.
The idea in principle: over time, you may have built up equity in your current property — the difference between what it’s worth and what you still owe. When you refinance it onto a buy-to-let basis, you may be able to borrow a little more than your current balance and take the difference as cash, which can form some or all of the deposit on the home you’re buying.
A few things to keep in mind, without any figures attached:
- Borrowing is capped by loan-to-value. How much you can raise is limited by a loan-to-value (LTV) percentage — the proportion of the property’s value the loan represents — and buy-to-let typically requires you to retain a larger share as equity (a bigger deposit) than a residential mortgage would. Each lender sets its own maximum LTV.
- The rent still has to support the larger loan. Releasing equity increases the borrowing on the let property, so the expected rent must still pass the lender’s stress test at that higher amount.
- More borrowing means more secured against the property. Raising equity increases the total you owe and, all else being equal, what you repay over time.
Whether releasing equity this way stacks up depends on both properties, the rent the let home is likely to earn, and your wider finances. For what’s realistic in your case — and the costs involved — speak to a qualified Mortgage Adviser.
Running the two applications together
The part of let to buy that catches people out is that the two halves are interdependent and need to be coordinated. The deposit for your new home may depend on equity released from the old one; the lender on your new residential mortgage will want to understand the borrowing you’re keeping on the property you’re letting; and the timing of both needs to line up.
In practice, that means:
- Two assessments, two sets of criteria. The residential purchase is assessed on your income and circumstances as a homebuyer; the let-to-buy remortgage is assessed largely on the rent the current property will earn. You need to satisfy lenders on both sides.
- Your existing borrowing counts. When you apply for the new residential mortgage, the lender takes account of the mortgage you’re retaining on the let property — though, where the rent is expected to cover that borrowing, many lenders treat it as self-financing rather than a drain on your income. How each lender handles this varies.
- Timing and sequencing matter. Because the deposit on the new home can hinge on completing the let-to-buy remortgage, the two often need to complete in a carefully managed order, and valuations, affordability checks and legal work all take time.
Coordinating two applications across potentially two lenders is exactly what a broker does day to day. A Mortgage Adviser can line the pieces up, explain how each lender views the other property, and keep the process moving — rather than leaving you to join the two halves together yourself.
How it compares with the alternatives
Let to buy isn’t the only way to move home, and it helps to see it next to the routes people weigh against it.
- Versus selling and buying. The conventional route is to sell your current home and buy the next one — simpler, releasing all your equity at once and leaving a single mortgage and no landlord duties. Let to buy is for those who’d rather keep the first property — as an investment, because they can’t sell quickly, or because they may want to return to it — and accept a second mortgage and the responsibilities of letting to do so.
- Versus a second-home mortgage. Let to buy is not buying a second home for your own use. With let to buy, the property you keep is let to tenants and treated as an investment — which is why the buy-to-let part is generally unregulated. A second home for your own occasional use is a different arrangement with its own rules.
- Versus a standard buy-to-let purchase. In a standard buy-to-let you’re buying an extra property to let. In let to buy, the property being let is the home you already own and live in, and the remortgage happens because you’re moving, alongside a residential purchase. The lending principles for the let property are similar; the context and the coordination with your onward move are what make let to buy distinct.
There’s no universally “right” choice here — it depends on your plans, your finances and your appetite for being a landlord. This is genuinely an area to talk through before committing.
A balanced view: the realities of becoming a landlord
Let to buy can be a sensible way to move home while holding onto a property you believe in — but it’s right to set the risks alongside the appeal.
- Two mortgages, two sets of risks. A residential mortgage on your new home and a buy-to-let arrangement on the old one both have to be serviced.
- Rent isn’t guaranteed. Void periods and tenant arrears can leave you covering the let property’s mortgage with no rent coming in, and property values can fall as well as rise.
- Letting is increasingly regulated. Safety, deposit, tenancy and energy-efficiency rules all apply and change over time. Managing a let property takes time, or money if you use an agent.
- The tax is involved. Rental income is taxable, the treatment of mortgage interest has changed in recent years, and moving a former main residence into letting can have its own tax implications. Niche Advice Limited does not provide tax advice — independent, professional and suitable tax advice alongside mortgage advice is well worth it here.
- The buy-to-let side is generally unregulated. The consumer protections around a residential mortgage don’t apply to the let-to-buy part in the same way.
None of this means let to buy is a poor idea — many people do it successfully and value keeping a property long term. It simply means going in with your eyes open, the sums done properly, and good advice behind you.
Frequently asked questions
What’s the difference between let to buy and buy to let?
With buy to let, you’re buying an additional property to rent out. With let to buy, you’re letting out the home you already own and live in so you can move into a new one — usually by refinancing your current home onto a buy-to-let basis and taking a new residential mortgage on the property you’re moving to.
Is let to buy regulated by the FCA?
Yes, unless you own a buy-to-let already the let-to-buy will fall under “consumer regulated buy-to-let”, and the onward purchase under standard regulation classification.
Can I release equity from my current home to fund the move?
Often, yes — it’s one of the main reasons people choose let to buy. Refinancing your current home onto a buy-to-let basis may let you release some of the equity towards the deposit on your new home. How much depends on each lender’s loan-to-value limits and on the rent the let property is expected to earn. Speak to a Mortgage Adviser for what’s realistic in your case.
Why can’t I just move out and rent my home on my current mortgage?
Most residential mortgages don’t permit ongoing letting, so letting usually means moving onto a buy-to-let arrangement designed for the purpose. A Mortgage Adviser can explain the options for your specific lender and property.
Do the two applications have to happen at the same time?
They’re closely linked. The deposit for your new home may depend on completing the let-to-buy remortgage, and your new residential lender will want to understand the borrowing you’re keeping on the let property — so the two often need to complete in a carefully managed order. That’s exactly the kind of thing a broker helps with.
A Let-to-Buy (i.e. turning your existing home into a buy-to-let and moving to a new home) is normally classified as a regulated mortgage contract, under the “accidental landlord” rule so attracts consumer protection. If the applicant already owns a buy-to-let at the point of this transaction then in may fall outside of regulation. A suitably qualified Mortgage and Credit Broker can explain what does and does not apply to your case.