Development Finance for Landlords – Converting HMOs, Flats and Mixed-Use Properties

For landlords looking to add value, development finance is a crucial tool. Whether converting a house into an HMO, redeveloping flats, or upgrading a mixed-use property, these projects often require funding beyond the scope of a standard mortgage. Development finance provides the bridge between vision and completion – but it comes with its own rules, risks, and requirements.

What Development Finance Covers

Development finance is designed for projects where works add significant value or change the property’s use. Typical examples include:

• Converting a single dwelling into a House in Multiple Occupation (HMO).
• Splitting a large property into self-contained flats.
• Refurbishing tired stock to meet EPC standards or improve yield.
• Redeveloping semi-commercial or mixed-use properties.

Unlike a standard loan, development finance is structured to release funds in stages as work progresses.

How It Works

Lenders typically advance funds based on a percentage of purchase price plus a percentage of build costs. Drawdowns are released in tranches, verified by monitoring surveyors who confirm that works are completed before the next stage is funded.

At the end of the project, the loan is usually repaid either by sale or refinance onto a term product such as a commercial mortgage.

When Development Finance Is Suitable

• When a property is not mortgageable at the outset due to condition.
• Where value uplift from refurbishment or conversion will support a refinance.
• When a landlord has the expertise to manage contractors and budgets effectively.
• For projects where timing and liquidity are critical to keeping momentum.

Risks and Considerations

Development finance is more expensive than standard term loans. Key risks include:

• Cost overruns if works take longer or materials rise in price.
• Delays in drawdowns if surveyors or lenders flag issues.
• Exit risk if the sales or refinancing market weakens.

To manage these risks, landlords should plan contingencies, obtain reliable cost estimates, and ensure they have liquidity buffers to cover unexpected expenses.

Practical Examples

• A landlord converts a Victorian house into a six-bed HMO using staged development finance, then refinances onto a commercial mortgage based on higher rental income.
• A portfolio owner redevelops a tired mixed-use building into upgraded retail and residential units, increasing both yield and value.
• A flat conversion project uses bridging to acquire, development finance to build, and a refinance to exit, maximising leverage throughout the process.

The Role of NACFB Brokers

NACFB brokers ensure projects are matched with lenders comfortable with the scale, location, and borrower experience. They negotiate terms, manage expectations around drawdowns, and present cases professionally to avoid costly delays. Their oversight helps landlords focus on delivery while finance runs smoothly in the background.

Conclusion and Takeaway

Development finance allows landlords to transform properties and unlock higher returns. But success depends on planning, risk management, and clear exit strategies. With the right broker and lender, development finance becomes a powerful enabler of long-term portfolio growth.

Next Steps

If you would like to discuss development finance with an NACFB member broker, please complete the short form below and a consultant will be in touch.

Published: 22 October 2025