Can I rent out my house and buy another?

For many homeowners, keeping their current property and renting it out while buying a new home is an attractive way to avoid selling at the wrong time — and it can be the start of a rental portfolio. The strategy is often known as let-to-buy: you let out your existing home and take a new mortgage on the property you move into.

It isn't, however, a simple "rent it out and carry on" decision. When you retain an existing main residence as a rental and buy another property, you need to consider:

• Potentially higher stamp duty on the onward purchase
• Changing the mortgage on the retained property (or obtaining lender permission to let)
• Buy-to-let affordability, which is based on rental income rather than salary
• Tax differences depending on whether the rental is held personally or through a Ltd company / SPV
• Timing and your exit route — whether you keep the rental long term or sell later

This guide sets out the main factors so you can see how the pieces fit together before you commit to a plan.

Important: Stamp duty and tax treatment can be fact-specific. We recommend confirming the position with a qualified tax adviser and/or solicitor.

1) Stamp duty: the onward purchase may cost more

If you buy another property while keeping your existing main residence, the onward purchase is usually treated as an additional residential property. That can mean paying an extra 3% stamp duty on top of the normal rates.

Relief if you sell within a set timeframe

In some circumstances, relief (or a refund) may be available if you sell your previous main residence within a defined period after buying your new home. Relief is time-sensitive and has specific claim deadlines, and the outcome depends on how the property is treated for tax purposes at the relevant points. It's worth checking the position early, because retaining a property can change the stamp duty you pay on the new purchase.

For official guidance, see: https://www.gov.uk/stamp-duty-land-tax

2) Your existing mortgage: permission to let vs remortgaging

Before you can rent out your current home, you need to consider what your existing mortgage allows.

Permission to let (a short-term bridge)

Many lenders may grant permission to let for a limited period — often around 12 months, sometimes longer. This lets you rent the property without switching to a buy-to-let mortgage straight away.

Permission to let typically comes with conditions:

• A fee and/or a higher interest rate
• The need to request extensions, which are not always guaranteed

Treat permission to let as a bridge rather than a permanent strategy.

Remortgage to a buy-to-let (longer-term)

If you plan to keep the property as a rental for the foreseeable future, the more typical approach is to remortgage onto a buy-to-let product. A buy-to-let mortgage is assessed differently from a residential one — it's not usually based on the same "income multiple" approach. For landlords considering a Ltd company/SPV route, the remortgage process is more specialist and may involve additional steps and documentation.

3) How much you can borrow for the next purchase

When you retain your property, the amount you can release for the new purchase is usually driven by buy-to-let underwriting, which focuses on the rental income and the property's value rather than your salary.

Lenders typically look at:

• Property value (current market value) and the resulting loan-to-value (LTV)
• Projected rent (based on realistic rental assumptions)
• Existing mortgage balance and the equity you can release
• Your tax position and how the rental will be held (personal vs Ltd company/SPV)

Even if you can borrow against the retained property, you may still need additional funds for the new deposit, fees, and any stamp duty due. Planning the cashflow and timing is often just as important as the mortgage itself.

4) Personal ownership vs Ltd company/SPV

One of the biggest decisions is whether the rental property will be owned personally or through a Ltd company / Special Purpose Vehicle (SPV).

Personal buy-to-let

Rental profits are generally taxed as income in the individual's name (subject to the relevant rules and your wider circumstances). Personal ownership can be straightforward and cost-effective where your overall tax position means the rental income is taxed at a lower effective rate.

Ltd company / SPV ownership

Some landlords hold buy-to-let property through a Ltd company or SPV. The company pays corporation tax on profits, and lenders may assess the rental income differently.

Potential advantages:

• Different tax treatment of rental profits
• Sometimes different (and potentially higher) borrowing capacity for the same rental income — subject to lender criteria

Potential drawbacks:

• Specialist lending requirements and different interest rates/product availability
• Additional ongoing administration and compliance costs
• The need to consider how funds are extracted from the company

Because the structure affects both mortgage underwriting and tax treatment, it's important to align the mortgage plan with your ownership and tax strategy.

5) Funding routes at a glance

When you keep your current home and buy a new one, the funding route often looks like one of these:

1. Permission to let first, then remortgage later — if your lender allows a temporary rental switch while you settle the new purchase.
2. Remortgage to buy-to-let — to release equity from the retained property for the onward purchase.
3. Move the retained property into a Ltd company/SPV (where appropriate) and use company lending to fund the new purchase.

Each route can affect stamp duty outcomes, cashflow timing, and the complexity of the process.

6) Timing and your exit route

Whether you're aiming for a short-term move or a long-term rental strategy, timing can affect both costs and options. Two timing points commonly come up:

1. How long you keep the original property as a rental (sometimes called the "3-year question")
2. Whether and when you sell the original property

If you expect to sell within a shorter window, that can change how stamp duty and other elements are approached (and may affect whether relief applies). If you expect to hold for longer, you'll usually need a plan that works on a sustainable buy-to-let basis.

It's also worth thinking about how your plan might change if you:

• decide to sell the retained property sooner than expected,
• want to move back into it,
• need to refinance, or
• your circumstances change (income, tax position, or household structure).

7) Practical and compliance considerations

Switching a home from residential to rental use brings practical issues beyond the mortgage itself:

• Ensuring the property is suitable for letting
• Landlord responsibilities and ongoing management
• Keeping records for tax purposes
• Understanding how the ownership structure impacts reporting and administration

Where company or SPV lending is involved, it's especially important to coordinate the mortgage plan with appropriate legal and tax support.

8) Planning checklist before you commit

Before deciding whether you can rent out your house and buy another, it helps to confirm:

• Your stamp duty position on the onward purchase (and whether any relief could apply)
• Your current lender's stance on letting — permission to let terms, fees, and duration
• Whether you need to remortgage to achieve the longer-term rental plan
• How much borrowing you may be able to raise, based on rental affordability and equity
• Which ownership route fits best — personal vs Ltd company/SPV
• Timing — how quickly you need to move, and how that affects permission to let and/or remortgaging
• Your exit route — do you intend to keep the rental long term or sell within a set window?

9) Why specialist input matters

This type of plan sits at the intersection of mortgage lending, stamp duty rules, and (in many cases) tax and legal structure. Even when the goal is straightforward — keep your current home and buy another — the details can be complex, and getting the structure and timing right can make a significant difference to the overall outcome.

For Ltd company/SPV routes in particular, expect a more specialist process and plan for input from a solicitor and accountant alongside your mortgage planning.

Related guides

• How let-to-buy mortgages work
• Let-to-buy mortgages
• Let-to-buy vs consent to let vs permission to let
• Changing a residential mortgage to buy-to-let
• Limited company buy-to-let (LTD/SPV) guide

Summary

Yes — many borrowers can rent out their current home and buy another, but the feasibility and cost depend on:

• Stamp duty on the onward purchase
• Whether you can obtain permission to let and for how long
• Whether you remortgage to buy-to-let (and when)
• How much you can borrow, based on rental affordability and equity
• How the rental is held: personal vs Ltd company/SPV
• Your timeline and whether you expect to sell the original property within a shorter window

Mapping the route early — temporary permission to let versus remortgaging, and personal versus company ownership — can help you avoid surprises and build a plan that aligns with both your cashflow and long-term intentions.

Useful official guidance

• HMRC: Stamp Duty Land Tax (SDLT) guidance (gov.uk)
• MoneyHelper: Renting out a property / buy-to-let considerations (moneyhelper.org.uk)