Let to Buy Mortgages

Edited: February 2026

Let to Buy mortgages allow homeowners to move house while keeping their existing property as a rental investment. Many people use this approach when they want to retain a well-located home, generate rental income, and purchase a new main residence at the same time.

This guide explains how Let to Buy works, who it suits, and what lenders look for. At GPS Financial, we regularly structure Let to Buy transactions and coordinate both mortgages to complete smoothly.

What Is a Let to Buy Mortgage and How Does It Work?

A Let to Buy mortgage allows you to remortgage your current home, release equity, and convert the property into a rental.

At the same time, you take out a new residential mortgage on the home you plan to live in. As a result, your existing property moves onto a Buy to Let style mortgage and must be rented out to tenants.

In most cases, lenders expect both mortgages to complete on the same day. This simultaneous structure allows lenders to assess affordability across both properties together.

What Is the Difference Between Let to Buy and Buy to Let?

Although the terms sound similar, the intention is different.

With Buy to Let, you purchase an additional property purely as an investment. With Let to Buy, you refinance your current home, keep it as a rental, and move into a new main residence.

For many homeowners, Let to Buy provides a practical way to move without giving up a long-term asset.

You can read more about Buy to Let lending here

Who Can Get a Let to Buy Mortgage?

Lenders assess Let to Buy applications on a case-by-case basis. However, most look for the same core factors.

Typically, you will need a clean or manageable credit profile, sufficient income to support borrowing, and enough equity to leave at least 25 percent loan to value in the existing property.

If your current mortgage sits at a high loan to value, Let to Buy may not be possible until more equity is available.

Who Offers Let to Buy Mortgages?

Let to Buy is a well-established mortgage product.

Many high-street and specialist lenders offer Let to Buy mortgages. However, some of the most competitive options are only available through mortgage brokers rather than directly to the public.

What Criteria Do You Need to Meet?

Although criteria varies by lender, common requirements include a minimum income, often around £25,000, acceptable credit history, limits on portfolio size, and rental income that comfortably supports the mortgage.

Rental affordability plays a key role. In higher-value areas, particularly parts of London, borrowing may be restricted where rental income does not keep pace with property values.

How Much Equity or Deposit Is Needed?

In most cases, you must leave at least 25 percent equity in your existing property once it moves onto a Let to Buy mortgage.

For example, if your home is mortgaged at 90 percent loan to value, Let to Buy is usually not available. If your home is mortgaged at 50 percent loan to value, Let to Buy is far more likely to be achievable.

The equity released is typically used as the deposit for your new residential purchase.

Can You Stay in a Let to Buy Property?

No.

Once your property is on a Let to Buy mortgage, it must be rented out. You cannot continue living in it.

For this reason, lenders usually structure Let to Buy as a simultaneous transaction, with the remortgage and onward purchase completing together.

Pros and Cons of Let to Buy

Let to Buy can work well, but it comes with important considerations.

Potential advantages include keeping a property as part of your rental portfolio, generating ongoing rental income, and avoiding selling costs on your existing home.

However, potential disadvantages include the additional 3 percent Stamp Duty surcharge on your new purchase, increased tax complexity, and the requirement to treat your former home purely as an investment.

Professional tax advice is strongly recommended before proceeding. Official guidance on Stamp Duty is available from HMRC

Are There Alternatives to Let to Buy?

Alternatives are limited.

Some homeowners choose to sell first and repurchase later. Others move out temporarily and remortgage onto a standard Buy to Let mortgage. In many cases, however, Let to Buy remains the most straightforward and efficient route.

How a Mortgage Broker Can Help

Many Let to Buy lenders only operate through intermediaries.

At GPS Financial, we assess affordability across both properties, identify suitable lenders, and manage the timing to ensure transactions complete smoothly. We also coordinate the Let to Buy mortgage alongside your onward residential purchase to reduce risk and delays.

Frequently Asked Questions

Is Let to Buy regulated?
Yes. The residential mortgage on your new home is regulated. The Let to Buy mortgage on the existing property is usually unregulated Buy to Let lending.

Do I need tenants in place before completion?
Not always. Some lenders allow completion based on an expected rental figure supported by a letting agent’s assessment.

Can first-time landlords use Let to Buy?
Yes. Let to Buy is often the first step into property investment.

Do I pay higher Stamp Duty on the new purchase?
Yes. The additional 3 percent Stamp Duty surcharge usually applies because you will own more than one property.

Can Let to Buy be done in stages?
Sometimes, but most lenders prefer simultaneous completion. Staged transactions require careful planning.

Can I move back into the property later?
Potentially, but this would require refinancing back onto a residential mortgage and meeting lender criteria at that time.

Speak to GPS Financial

If you are considering Let to Buy and want clear, practical advice, speak to the team at GPS Financial.

We will review your current mortgage, assess rental potential, and help structure a Let to Buy solution that supports your move.

Call 029 2267 7707 or contact us here.