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Buy to Let mortgage guide

If you want to buy a property to rent out rather than live in, a  buy to let mortgage (BTL) could help you get there. But how does a buy to let mortgage work exactly? In this helpful guide, we talk you through what they are, what they mean for you and how you can apply with us.

What is a buy to let mortgage?

Buy to let mortgages are designed to help you buy a property, just like an ordinary mortgage, but with some key differences.

For example, with a BTL mortgage, you rent out a property to tenants which creates monthly income (so you can repay the mortgage). The amount you can borrow with a buy to let mortgage will usually depend on how much rent you’re likely to expect from the property.

How do buy to let mortgages work?

A buy to let mortgage is like a residential one, you still buy a property. The difference is that you’re buying a property to rent out to others instead of living in it yourself.

How do I repay my mortgage?

  • Interest only mortgages - these allow you to pay only the interest each month, with the full loan amount due at the end of the mortgage term
  • Repayment mortgages - these allow you to make monthly repayments towards the interest and the amount borrowed, and the loan will be paid off by the end of the term as long as you keep up with repayments
  • Part and part mortgages - these are when you split your mortgage repayments to part interest only and part repayment

Portfolio landlords

If you have four or more mortgaged buy to let properties, we will class you as a portfolio landlord. So, a specialist underwriter will need to review your application.

We allow portfolio landlords with a minimum of four and no more than ten mortgaged BTLs. Other lenders will have different criteria, with some taking larger portfolios.

Portfolio landlords will need to apply through a broker for a mortgage with us.

Temporary letting

If you've got a residential mortgage but need to let the property for a short period of time, you'll need to contact your lender to get Consent to let. Depending on how long you want to let out your home, you may need to switch to a buy to let mortgage.

Can I rent out a room and still have a residential mortgage?

You’ll need your lender's consent before you can rent out a room. Consent could be subject to you agreeing to certain criteria. It may also be worth considering the government's Rent a Room scheme (opens in a new window).

Who can get a buy to let mortgage?

Common eligibility factors

  • The minimum age is generally 18 and the maximum age varies by lender
  • Usually, have UK residency
  • If buying alone, you may already need to own a residential property
  • Pass a credit assessment
  • Minimum deposit of 25% is often required
  • Lenders usually require a minimum property value, which may be at least £50,000
  • Property condition must be good; lenders may also have restrictions on type of property

Affordability and costs

What you could borrow

This will depend on factors including how much rent you expect to get, maintenance costs, agent fees, landlord insurance and other potential costs.

Find out how much you could borrow and what your monthly payments could be.

Deposit needed

You generally need a bigger deposit with a buy to let mortgage than a residential mortgage. Typically, most lenders require a minimum deposit of 25%.

Possible additional costs

  • Product fees
  • Valuation fees
  • Administration fee
  • Legal fees
  • Stamp duty (known as Land and Business Transaction Tax in Wales, and Residential Property Rates in Scotland)

Finding a property

When searching for a property, it’s important to be clear about both the type of property you want and where it’s located.

Keep an eye on house prices in your chosen area, as well as the average rental costs - this will give you a good sense of demand and local market conditions.

It’s also worth getting to know the area by looking at things like:

  • The type of tenants the area attracts (students, families, professionals)
  • The area’s reputation
  • Transport links
  • Shops, facilities, schools
  • Any large scale developments that could impact property prices
  • Property values

All of these factors will influence the kind of property you choose to buy. You should also think about whether any work is needed before renting it out, if there are service charges or ground rents to pay and how energy efficient the property is.


How to apply for a buy to let mortgage with us

Whether you're an experienced landlord or it's your first buy to let property, Leeds Building Society has a range of buy to let mortgages available. As well as helping you purchase a buy to let property, we're also here if you'd like to remortgage from another lender.

We do not provide advice for our buy to let mortgages. If you’d like advice on what buy to let mortgage to choose you can apply through a broker. You also cannot apply online for a buy to let mortgage with us.

Applying through us

These are some mortgages you can apply for directly through us.

Standard Buy to Let Mortgages

Mortgages for people buying or remortgaging a property to rent out.


Holiday Let Mortgages

Mortgages for buying a holiday property to let or use yourself.


HMO (Houses in Multiple Occupation) Mortgages

HMO mortgage products offer you even more lending options in the Buy to Let market.


If you have any questions, you can call us on 03450 505 062 or book a non-advised appointment with our buy to let specialists.

Applying through a broker

You can apply through a broker for any of our general buy to let mortgages, but for our more specialised mortgages, you can only apply using a broker. The broker-only mortgages are:

Limited Company Buy to Let Mortgages

These mortgages are for taking a mortgage on a property through a limited company, rather than in your own name.

Portfolio Buy to Let Mortgages

These are mortgages for borrowers who have four or more distinct mortgaged rental properties in the UK.

You’ll need to find your own mortgage broker. If you’re not sure where to start, unbiased.co.uk offers a free service to help you find an FCA-regulated expert.

Unbiased.co.uk (opens in a new window)

Your rental property could be repossessed or a receiver of rent appointed, if you don’t keep up your mortgage repayments.

Tips for landlords

As a landlord, it’s your responsibility to ensure your rental property is safe and free from hazards. This includes keeping all safety documentation up to date, especially those relating to gas and electrical equipment. Along with this, you should also ensure you have an up to date Energy Performance Certificate (EPC).

Before agreeing to a tenancy, make sure your tenants have provided the necessary documentation and, where applicable, references. Some landlords prefer to meet their tenants in person - this is entirely your choice.

Once you have chosen your tenants, ensure that all parties are happy with the tenancy agreement. This should clearly set out the rental term, costs and any arrangements for rent reviews or property inspections. Finally, protect your tenants’ deposit through a government-approved scheme.

Find out more about landlord responsibilities

Buy to let mortgages - Common questions

This guide is not advice and you should seek independent financial or legal advice if needed.