Bridging Finance for Unmortgageable Properties

March 2026

Some properties cannot be financed with a standard mortgage.

They may be missing essential facilities, require significant renovation, or fall outside the criteria of mainstream lenders. While this can make them difficult to finance with traditional lending, it can also create strong opportunities for property investors.

Bridging finance can provide a short term funding solution that allows investors to purchase these properties quickly, carry out improvements, and then refinance onto longer term finance once the property becomes suitable for standard lending.

At GPS Financial, we regularly arrange bridging finance for investors purchasing properties that standard lenders will not consider.

What Makes a Property Unmortgageable to Mortgage Lenders?

A property is typically considered unmortgageable when it does not meet the minimum requirements of mainstream mortgage lenders.

Common examples include properties that:

• Do not have a working kitchen or bathroom
• Require significant structural repairs
• Are in poor or derelict condition
• Have a short lease remaining
  Are of non standard construction
• Have been partially developed or significantly altered
  
  

In these situations, most buy to let lenders will not offer finance until the property has been improved or brought up to an acceptable standard.

How Bridging Finance Can Help

Bridging finance is designed to provide short term funding for situations where speed and flexibility are important.

For property investors, this can make it possible to secure properties that would otherwise be difficult to finance.

Once the purchase has completed, investors can carry out refurbishment, structural improvements, or reconfiguration of the property. When the property becomes suitable for mainstream lending, it can often be refinanced onto a longer term buy to let mortgage.

This approach is commonly used by investors who:

• Purchase properties that require renovation
• Acquire properties at auction 
• Buy properties below market valuePlan to convert or significantly improve a property before refinancing

How Much Can You Borrow for an Unmortgageable Property?

The amount you can borrow will depend on the condition of the property, the level of work required, and the overall structure of the project.

Most bridging lenders will assess the loan based on the current value of the property and the level of risk involved. In many cases, bridging finance may be available at up to around 70 to 75% of the property’s current value.

If the property requires significant refurbishment or structural work, the maximum loan may be lower, as lenders will consider the additional risk involved.

Where investors already own other property, it may sometimes be possible to use additional security to increase the overall loan available. This can allow higher leverage and in some cases enable the full purchase price of the property to be funded.

Each case is assessed individually, and the amount available will depend on the property, the proposed works, and the exit strategy.

100% Funding Options

In some situations it may be possible to arrange bridging finance that effectively covers the full purchase price of a property.

This is typically achieved by using additional security, such as equity in another property owned by the investor. The lender may then consider the combined value of both properties when assessing the loan.

For example, an investor purchasing a property that requires refurbishment may use equity from another property in their portfolio to increase the overall loan available. This can sometimes allow the purchase to proceed without a traditional cash deposit.

This approach is commonly used by experienced investors who wish to preserve cash for renovation costs or other projects.

Every case is assessed individually and the structure will depend on the security available and the planned exit strategy.

When Investors Use Bridging Finance for Unmortgageable Properties

Bridging finance is often used by property investors who are purchasing properties that require significant improvement before they can qualify for a standard mortgage.

Typical scenarios include buying a property that needs renovation, purchasing a property at auction, or securing a property below market value where fast completion is required.
You can read our detailed guide to auction bridging finance to understand how investors commonly use bridging loans when buying property at auction.

Once the refurbishment or improvements have been completed, the property may then be refinanced onto a buy to let mortgage or sold as part of an investment strategy.

For investors who specialise in renovation or property conversion projects, bridging finance can provide the flexibility needed to secure opportunities that traditional lenders will not support.

Exit Strategies for Bridging Finance

Bridging finance is normally arranged as a short term solution, so having a clear exit strategy is essential.

Common exit routes include refinancing onto a buy to let mortgage once the property has been renovated and meets standard lending criteria.

Another option is selling the property after renovation to realise the increase in value.

Some investors also move the property onto longer term development finance where further works are planned.

Having a clear exit strategy from the start is an important part of structuring bridging finance successfully.

How GPS Financial Can Help

Every bridging case is different, particularly when a property has unusual characteristics or requires significant work.

GPS Financial works with a wide range of specialist lenders who understand property investment projects and complex scenarios. Our role is to understand your project, identify suitable lenders, and guide you through the process from the initial enquiry through to completion.

If you are considering purchasing a property that cannot be financed with a standard mortgage, we can help you explore the bridging finance options available. Get in touch anytime.  We are here for you.