Best investment property mortgage lenders in the UK in 2026

The best investment property mortgage lenders in the UK include high street banks such as Barclays, NatWest and Lloyds Bank, specialist lenders such as Paragon and Shawbrook Bank, and challenger lenders such as Together, each suited to a different type of investor, property and deal size. There is no single lender that works best for everyone. The right choice depends on the property you are buying, whether you are applying personally or through a limited company, and how large your portfolio already is.

Choosing the right lender matters just as much as choosing the right property, since criteria, rates and maximum loan to value vary hugely between a mainstream bank and a specialist provider. This guide covers the main types of investment property mortgage, the best lenders to compare, current rates and deposit requirements, and what you will need to apply.

What is an investment property mortgage?

An investment property mortgage is finance secured against a property you are buying or refinancing to generate income or growth, rather than to occupy yourself. Lenders assess these applications differently to a residential mortgage, focusing on the rental income the property will generate, or how secure the tenant's lease is for a commercial let, rather than just your personal income.

Because the lender's risk is tied to the property's performance rather than your salary, an investment property mortgage usually needs a bigger deposit and comes with a higher rate than a standard residential mortgage on the same property value.

What types of investment property mortgage can you get?

The right product depends on the property you are buying and how you plan to let it.

• Buy to let mortgage. For a single residential property let to one household, assessed mainly against expected rental income and available from most high street and specialist lenders. 

• HMO and multi unit mortgage. HMO stands for house in multiple occupation, a property let room by room to several unrelated tenants, while a multi unit mortgage covers a block of several self contained flats under one title. Both are treated as a form of buy to let but priced and underwritten by specialist lenders, since the higher rental yield comes with more tenant turnover and management to consider.

• Commercial mortgage. For a commercial property, such as a shop, office or industrial unit, let to a business tenant rather than a residential one, assessed against the strength of the tenant's lease as much as the property itself. 

• Portfolio mortgage. For landlords holding four or more mortgaged properties, some lenders assess the whole portfolio's income and debt together, rather than one property at a time, which can simplify refinancing as you grow.

What are the main types of investment property mortgage lenders?

Lenders fall into three broad groups, each with a different appetite for risk and complexity.

• High street banks, such as Barclays, NatWest and Lloyds Bank, offer competitive rates to strong, straightforward applications, but tend to have stricter criteria on property type, portfolio size and applicant income.

• Specialist lenders, such as Paragon and Shawbrook Bank, focus on property investors specifically, and are typically more flexible on portfolio landlords, limited company structures, HMOs and multi unit blocks.

• Challenger and alternative lenders, such as Together, take a more case by case view of an application, and can consider non standard property types or circumstances that a mainstream bank would decline.

For a deeper comparison focused purely on residential buy to let, our buy to let mortgage lenders guide breaks down rates and criteria lender by lender.

The best investment property mortgage lenders to compare in 2026

There is no single best lender for every investor, which is why comparing across a panel tends to find better terms than applying to one bank directly. These are examples of lenders worth comparing from the Capitalise panel of 130+ UK providers, each suited to a slightly different type of investor or property.

Figures are based on publicly available lender information as of August 2026. Always confirm current terms directly with the lender, or through a Capitalise funding specialist, before you apply.

What deposit and rate should you expect on an investment property mortgage?

Most investment property mortgages need a deposit of at least 25% of the property's value, capping the loan to value at around 75%, though some specialist lenders will stretch to 80% for strong applications.

These figures reflect Capitalise's panel of specialist and near prime lenders as of August 2026, not a quote, and can run higher than a simple, prime deal arranged directly with a high street bank. The Bank of England base rate has sat at 3.75% through mid 2026, and every lender applies its own margin on top depending on the property, your experience and their appetite at the time. Run your own numbers with our buy to let mortgage calculator to see what a given rate and term would cost.

How much rental income do you need for an investment property mortgage?

Most lenders need the expected rent to cover at least 125% of the mortgage interest, calculated at a stress rate higher than the rate you will actually pay, which is known as the interest coverage ratio. Borrowers applying personally, rather than through a limited company, are often asked for 145% cover instead. Commercial investment mortgages are usually assessed a little differently, against the strength of the tenant's lease rather than a fixed percentage. Our buy to let mortgage guide walks through the full stress test maths with a worked example, if you want to check a specific property against it.

Am I eligible for an investment property mortgage?

Most lenders on the Capitalise panel look at a similar set of factors, whichever type of investment property you are financing.

• Rental income, or a signed lease, that meets the lender's coverage requirement

• A deposit of at least 25% of the property's value, more for complex or non standard cases

• Your credit history, and your business credit score if applying through a limited company

• Your experience as a landlord or investor, particularly for larger portfolios or HMOs

• Any other borrowing you already hold against existing properties

Even if your circumstances are not straightforward, such as a newer portfolio or an unusual property type, it is worth comparing more than one lender, since some on our panel specialise in cases a mainstream bank would turn down.

How do you compare investment property mortgage lenders?

A few factors matter more than the headline rate when you are weighing up investment property mortgage lenders.

• Rate and true cost. Look beyond the pay rate to the APRC, which reflects the total cost including fees, so you are comparing like for like across lenders.

• Fees. Arrangement, valuation and legal fees vary widely between lenders and can outweigh a small difference in rate on a large loan.

• Flexibility on structure. If you are buying through a limited company, already hold several properties, or the property is an HMO or multi unit block, you need a lender whose criteria actually stretch to your situation.

• Maximum loan to value. A lender's ceiling on borrowing against the property's value directly affects how much deposit you will need to find.

Comparing all of this lender by lender takes time, and applying to several individually can affect your credit score. This is where a panel makes the difference. Rather than approaching one bank and hoping it fits, apply with Capitalise and we'll match you with providers most likely to say yes on your terms, with a dedicated funding specialist talking you through the rates, fees and structure on offer before you commit.

Investment property mortgage vs bridging loan vs development finance

An investment property mortgage is not always the right tool, depending on the property's condition and how quickly you need to move.

• Buying a finished, tenanted property to hold long term? An investment property mortgage is usually the lowest cost option.

• Need to complete quickly, such as buying at auction, or the property is not mortgageable yet? A bridging loan covers the gap before you refinance.

• Funding a conversion or major refurbishment before it is ready to let? Development finance is released in stages as the work progresses.

Many investors use more than one of these across a single project, bridging or developing first, then refinancing onto an investment property mortgage once the property is complete and let.

Apply for an investment property mortgage with Capitalise

Compare investment property mortgage offers from our panel of UK lenders, covering high street banks, specialist buy to let and commercial providers, and challenger lenders. A dedicated funding specialist will match your property and circumstances to the lenders most likely to offer competitive terms, right through to completion.