A MUFB mortgage (multi-unit freehold block mortgage) finances properties where multiple self-contained units sit on a single freehold title — a block of flats, a converted house with individual units, or a purpose-built investment block. Most buy-to-let lenders do not offer MUFB products, or impose severe restrictions on the number of units they will consider. The specialist lenders we work with take a different view.

 

At Onozzi, we arrange MUFB mortgages for blocks of any size — from a two-unit conversion to a twenty-unit residential block. We have access to specialist MUFB lenders who assess these properties on their rental yield and loan-to-value rather than applying blanket unit restrictions. Up to 85% LTV is available through lenders on our panel. Both personal name and limited company applications are accepted. Where the rental income falls short of standard stress-test calculations, top slicing arrangements are available through specialist lenders.

 

With over 15 years’ experience in arranging large mortgages and high-value property finance for clients in the UK and abroad, we have the expertise and direct connections with decision-makers at private banks, mainstream banks, and specialist lenders to secure the best possible terms for our clients.

 

Check out our Case Studies for an overview of the types of deals we can arrange. If you’re looking for help sourcing a mortgage to buy an MUFB property or a remortgage to reduce your outgoings, contact us to speak with one of our specialist advisers.

MUFB investments offer strong yield potential for experienced landlords — a block of six flats generating individual rents typically produces a total rental yield that a single property cannot match. The mortgage structure is more complex than a standard buy-to-let, which is why the right broker matters. We have direct relationships with the specialist lenders who understand MUFB underwriting, and we have arranged MUFB finance for blocks ranging from converted Victorian terraces to purpose-built apartment complexes.

What is an MUFB Mortgage?

MUFB v HMO

A Multi-Unit Freehold Block has self-contained units with individual tenancies. An HMO has shared facilities. The mortgage products and lenders differ between the two. If you are unsure which category your property falls into, we can advise.

MUFB vs Portfolio

A MUFB is a single property with multiple units on one title. A portfolio of separate properties each with their own title is financed differently. We arrange both MUFB mortgages and portfolio landlord finance.

Freehold v Leasehold

MUFB finance is typically available for freehold blocks. Where units are sold on long leases (e.g. 125 years), different lending criteria may apply. We can advise on the right product for your specific title structure.

What our clients think

Why Onozzi

Whole of Market

We are not panel-restricted. Our access to 80+ specialist lenders — including specialist MUFB lenders, commercial lenders, and private banks — means we search the full market for the best MUFB mortgage for your specific block and circumstances

Limited Company & Personal Name

MUFB mortgages are available through both personal name applications and SPV limited company structures. For portfolio landlords using a company, we can source MUFB products available through both routes and advise on the implications of each.

Expert MUFB Knowledge

Onozzi has arranged large and complex mortgages for over 15 years. Our HMO cases range from small first-time purchases to large licensed MUFB portfolio refinances. We have direct relationships with decision-makers at specialist lenders and private banks.

Why MUFB Investors Choose Onozzi

LIMITED COMPANIES

MUFB mortgages are available through both personal name applications and SPV limited company structures. For portfolio landlords using a company, we can source MUFB products available through both routes and advise on the implications of each.

NO MAXIMUM UNITS

Most mainstream lenders restrict MUFB mortgages to a maximum of 4 units. Specialist lenders on our panel have no maximum unit restriction. Whether you are financing a 3-unit conversion or a 15-unit residential block, we have lender access.

TOP SLICING

We work with lenders who will consider your rental income to top up affordability.

HIGH LTV OPTIONS

Standard MUFB lending typically maxes at 75% LTV. Through specialist lenders on our panel, we can access up to 85% LTV for qualifying properties. This reduces the deposit requirement significantly for larger blocks.

TOP SLICING AVAILABLE

If the rental income from your MUFB does not meet the standard rental coverage ratio required by most lenders, top slicing allows personal income to be used to supplement the stress test calculation. Available through specialist lenders in our network.

EX-PAT LANDLORDS CONSIDERED

UK nationals living abroad who wish to finance a UK MUFB investment can do so through specialist lenders on our panel who offer ex-pat BTL products.

LIMITED COMPANIES

MUFB mortgages are available through both personal name applications and SPV limited company structures. For portfolio landlords using a company, we can source MUFB products available through both routes and advise on the implications of each.

NO MAXIMUM UNITS

Most mainstream lenders restrict MUFB mortgages to a maximum of 4 units. Specialist lenders on our panel have no maximum unit restriction. Whether you are financing a 3-unit conversion or a 15-unit residential block, we have lender access.

TOP SLICING

We work with lenders who will consider your rental income to top up affordability.

HIGH LTV OPTIONS

Standard MUFB lending typically maxes at 75% LTV. Through specialist lenders on our panel, we can access up to 85% LTV for qualifying properties. This reduces the deposit requirement significantly for larger blocks.

TOP SLICING AVAILABLE

If the rental income from your MUFB does not meet the standard rental coverage ratio required by most lenders, top slicing allows personal income to be used to supplement the stress test calculation. Available through specialist lenders in our network.

EX-PAT LANDLORDS CONSIDERED

UK nationals living abroad who wish to finance a UK MUFB investment can do so through specialist lenders on our panel who offer ex-pat BTL products.

Core Areas

Large Mortgages

Our specialty lies in providing tailor-made mortgage solutions for loans over £1 million. Our success is underpinned by our established relationships with private banks, mainstream banks, and specialist lenders. We pride ourselves on our personalised approach, understanding our clients’ unique profiles to match them with the right financial institution.  Our longstanding industry connections often enable us to unlock exclusive deals that transcend typical lending criteria. Clients looking for an expert mortgage broker value our proficiency and dedication to securing the best loan terms.

Complex Mortgages

We thrive on sourcing unconventional mortgages, be it for non-standard property types, self-employment income, or foreign income sources. Mortgages are multifaceted, demanding a deep understanding of the market and strong banking relationships to secure the best deals. As a specialist in complex mortgages, we offer the expert knowledge and professional relationships essential to navigate these challenging scenarios. If there is a solution available for your complex mortgage needs, we will find it.

Commercial and Real Estate Finance

Our experience spans across a variety of asset classes and client types. From individuals looking to buy their trading premises to large organisations refinancing their commercial real estate portfolios.  We often engage multiple lenders simultaneously, presenting each deal with complete transparency.  As lenders are aware that they are in a competitive tendering process, we encourage the provision of the best possible rates. Our partners experience the difference that our client-centred approach makes in their commercial and real estate financing.

BTL Mortgages

Navigating the complexities of buy to let mortgages can be demanding, particularly when faced with portfolio landlord criteria or seeking financing for an HMO or multi-unit block. As regulations for BTL Mortgages become increasingly complex, it’s more important than ever to have an expert broker to guide you through the diverse criteria on stress tests, property types, and portfolio restrictions. We demystify the complexities of BTL mortgages. We specialise in securing portfolio loans from multiple lenders, resulting in lower rates and higher leveraging.

Mortgages for Business Owners

Business owners encounter distinct challenges when pursuing mortgages, including the need to substantiate income and demonstrate stability. Our tailored mortgage solutions reflect the unique income structures of business owners. Traditional lenders tend to calculate their loan offers based on historical dividends, potentially underestimating the business owner’s real income. By partnering with us, you can take advantage of our expertise in sourcing mortgages designed for business owners. We carefully assess your income, liaising with lenders who consider your profit share, the latest year’s profit, or pre-tax profits to maximise your borrowing potential.

Bridging and Development Finance

Sourcing the best bridging or development terms requires industry knowledge and expertise. Our team excels in sourcing deals for both non-experienced developers and seasoned professionals. We have access to low-rate bridging loans through strategic partnerships with building societies and private banks. Moreover, we specialise in arranging high-value self-build mortgages, ensuring that your financing needs are met throughout the entire development process. With our guidance, you can embark on your projects with confidence, secure in the knowledge that we will procure the most favourable rates and terms available.

Case
Studies

Our case studies highight real-world examples of how we help our clients achieve their goals.

£15m HMO Portfolio Loan

We secured £12.5m of borrowing on 25 of the 30 properties with three high-street lenders, leaving 5 high-value properties unencumbered for future sales or development.

Read more
£11m BTL Portfolio Loan

By securing a deal with multiple lenders the client was able secure 70% borrowing on a lower all-in fixed rate

Read more
BTL with TOP SLICING for overseas client

Our client was an Italian national who owned a residential property in London.

Read more
LTD CO BUY TO LET MORTGAGE WITH TOP SLICING

We secured a loan facility with greater borrowing than any other lender using the client's net profit as security for the rental shortfall.

Read more
£3.9m Loan on Complex BTL Properties

All in, the new arrangement will save the client over £500k over five years

Read more
Buy-To-Let Refinance For Cypriot National

Our client was a Cypriot National who owned several investment properties in London.

Read more

Our Team

Their unique blend of skills and expertise provide you with the best service possible.

Our principal broker with over 15 years’ experience in arranging large and complex mortgages. Brian is particularly adept at re-structuring clients’ property portfolios to find the most cost-efficient combination of loans. Brian’s primary focus is securing the best possible finance terms for HNW individuals and large property portfolios through his extensive network of contacts in both the Private Banking and Corporate Real Estate Sectors.

Brian O’Neill—
Principal Broker

Working with Onozzi for over 5 years, Craig has accrued a wealth of knowledge and specialises in sourcing complex Buy-to-Let and self-employed mortgages. His deep understanding of lenders’ criteria, combined with extensive contacts within the industry, allows him to secure deals with both mainstream and niche lenders. Craig particularly enjoys assisting clients in purchasing their dream homes by finding tailored solutions from the whole of the UK market.

Craig Scott—
Senior Broker

Sam's career showcases his expertise in streamlining complex processes across various industries, from large-scale international events to staff recruitment. As our operations manager, he's transformed and optimised our systems to improve our efficiency and enhance our client journey. Sam's values-driven approach and professional qualifications in leadership and management equip him with a unique perspective to ensure the operational effectiveness of Onozzi.

Sam Hey—
Operations Manager

Lara offers a highly personal and discreet protection-focused service, specialising in safeguarding clients with complex financial arrangements. Her understanding of insurer criteria and extensive market access allow her to structure bespoke life, income and business protection solutions tailored to each client’s circumstances. As well as this, Lara also advises on complex mortgage arrangements, ensuring clients’ borrowing is structured with the same level of care and precision.

Lara Williamson—
Mortgage & Protection Specialist

Previously a Distillery and Liquid Innovations Manager for a leading gin company, Joe brings creativity, precision, and an eye for detail to his work. Now as our most recent trainee broker, he is learning from the senior team to develop his expertise in specialist lending and tailored funding solutions. Joe aims to ensure every client has a seamless and bespoke experience.

Joe Hornig—
Trainee Broker

We are always interested in top talent and we are currently looking to hire a new experienced broker.
If you would like to join our team please send your CV to hello@onozzi.com

Our Impact

FAQs - MUFB Mortgages

What is a MUFB mortgage?

A MUFB mortgage (multi-unit freehold block mortgage) is a specialist buy-to-let mortgage for properties where multiple self-contained residential units sit on a single freehold title. Each unit has its own front door and facilities. The mortgage is assessed on the total rental income from all units and the overall loan-to-value of the freehold property.

How many units can I finance?

With the specialist lenders we work with, there is no maximum number of units. Mainstream lenders typically restrict MUFB mortgages to blocks of 4 units or fewer. Specialist lenders on our panel will consider larger blocks — the assessment is based on rental yield and total loan size, not an arbitrary unit cap.

What LTV is available for a MUFB?

Standard MUFB mortgages typically max at 70–75% LTV. Through specialist lenders on our panel, we can access up to 85% LTV for qualifying properties with strong rental yield. The exact LTV available depends on the property, the rental income, and the overall loan size.

Can I buy a MUFB through a limited company?

Yes. SPV limited company applications are available for MUFB mortgages through specialist lenders we work with. The mortgage rates for limited company MUFB applications differ from personal name applications. We can advise on both routes and the criteria each lender applies.

What is the difference between a MUFB and an HMO?

An HMO (House in Multiple Occupation) has shared facilities — typically shared kitchens and bathrooms — and is rented on a room-by-room basis. A MUFB has self-contained units, each with its own kitchen and bathroom, rented on individual tenancies. The mortgage products, lenders, and licensing requirements differ between the two. If you are unsure which category your property falls into, we can confirm and advise on the right product.

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