HMO Mortgage UK: Specialist HMO Finance for Landlords

HMO Mortgage Criteria at a Glance

Every lender writes its own rules. What follows is where most of them sit.

Our HMO mortgage requirements page lists the documents and property checks in full. And if your case sits outside these figures, ask us anyway. A deal that fails one lender’s rent test can pass another’s.

What is an HMO?

Under the Housing Act 2004, a property is an HMO when three or more people from more than one household live there and share a kitchen, bathroom or toilet. Gov.uk sets out the licensing position.

At Commercial Finance Network, we operate nationally as an HMO mortgage broker and arrange finance for most types of shared property. Typical examples include:

• Shared houses let room by room on one or more ASTs
• Houses converted into bedsits
• Student house-shares and shared flats
• Lodging houses
• Converted properties let as shared accommodation

Purpose-built blocks of self-contained flats are normally financed as multi-unit freehold blocks rather than HMOs, and we arrange those as well.

Licensing rules keep tightening, and more HMOs now need a licence to operate legally. We work with specialist lenders who lend on both licensed and unlicensed HMOs, provided local amenity standards are met and the property is operating lawfully.

Planning, Article 4 and Licensing

Finance and planning sit closer together on HMOs than on any other property type. A lender will not advance against a property operating unlawfully, and planning status changes what the building is permitted to be.

Start with use classes. An ordinary dwelling is C3. A small HMO housing between three and six people is C4. Moving from C3 to C4 is normally permitted development, so no planning application is needed. Push past six occupants and the property becomes sui generis, which always requires full planning permission.

Article 4 directions remove that convenience. Councils apply them to areas where HMO concentration has become a concern, and the effect is to strip out the permitted development right. Inside an Article 4 area, converting a house to a small HMO requires a planning application like any other, and refusal is common. Buy in one of these areas assuming the conversion is automatic and the project stops before it starts. Check the direction before exchange, not after.

Licensing runs alongside planning as a separate requirement. Since October 2018, mandatory licensing applies to any HMO housing five or more people from two or more households, and the old storey threshold no longer features. Many councils operate additional or selective schemes that pull smaller properties in as well, and those rules vary considerably between authorities.

Room sizes carry statutory minimums attached to the licence. A room slept in by one person over ten must reach 6.51 square metres. Two people over ten need 10.22 square metres. A child under ten needs 4.64 square metres. Anything below 4.64 square metres cannot be used for sleeping at all. Surveyors measure. Rooms that fall short get excluded from the income assessment, which drags the valuation down with them.

Lenders check licence status as part of underwriting. Some will accept evidence that an application has been submitted. Others want the licence issued before completion. That distinction decides your timeline, and it is worth confirming early.

These rules apply in England. Wales, Scotland and Northern Ireland operate different regimes, and any HMO finance application needs to reflect the right one from the outset.

Commercial vs Bricks-and-Mortar Valuation in HMO Finance: The Number That Decides the Deal

Two surveyors can walk into the same HMO and produce very different figures. The gap between them is the single biggest factor in what you can borrow, and most landlords meet it only when the valuation report lands. Our page on how lenders assess HMO mortgage applications covers the wider underwriting checks that sit around the valuation.

Bricks and mortar is the first basis. The surveyor ignores the rent roll and asks what the building would fetch as an ordinary house on that street. Comparable sales set the number. A six-bedroom terrace in an area where six-bed houses sell for £250,000 is worth £250,000, regardless of how many tenants pay rent inside it.

Commercial valuation works from income instead. The surveyor takes the annual rent, deducts the cost of running the place, and capitalises what remains at a yield that reflects the location and the quality of the asset. Run those numbers on the same terrace. Six rooms at £550 a month produce £39,600 a year. Operating costs on an HMO with bills included absorb roughly 30%, leaving £27,720. Capitalise that at 9% and the valuation reaches £308,000.

Same building. £58,000 apart.

Now the borrowing. At purchase, lenders advance against the lower of price or valuation, so the commercial figure rarely helps on day one. Buy at £250,000 with 75% lending and the loan is £187,500, with £62,500 down. Hold the property, let the rooms, and refinance twelve months later on a commercial basis, and 75% of £308,000 gives £231,000. That releases £43,500 of capital without selling anything.

Two conditions govern access to this. Size is the first. Many lenders reserve commercial valuation for larger HMOs, often seven bedrooms or more, and assess anything smaller as a house. Location is the second. The capitalisation yield moves with the strength of the local market, and a weaker area attracts a higher yield, which pushes the valuation down rather than up.

Budget on a commercial valuation and receive a bricks and mortar one, and the deal fails at the last moment. Establish which basis a lender will apply before you commit to anything, since it changes what your HMO finance actually needs to achieve.

How Lenders Assess HMO Rental Income

Rent from an HMO arrives room by room, and lenders treat that income differently from a single tenancy. The test itself is the interest coverage ratio, shortened to ICR, and it compares rent against mortgage interest at a stressed rate rather than the rate you pay. Our page on debt servicing ratios in complex HMO deals covers how this differs from DSCR on more complicated cases.

Take the £231,000 refinance above. Stressed at 5.5%, monthly interest reaches £1,059. A 125% test needs rent of £1,323. A 145% test needs £1,535.

The property produces £3,300 a month across six rooms. Cover lands at 312%. Even after a 25% deduction for voids and bills, which many lenders apply as standard, income of £2,475 gives 234% cover. Both figures sail past either bar.

This is why the rent test rarely decides an HMO application. The income is simply too strong relative to the debt. Valuation does the work instead, and that returns you to the section above.

One scenario changes the answer completely. Some lenders will not accept room-by-room income on smaller HMOs and assess the property on what it would achieve as a single let. Suppose that same house lets to one family for £1,400 a month. Cover falls to 132%. A basic rate taxpayer clears 125%. A higher rate taxpayer fails 145% and the loan shrinks.

The rent roll did not move. The lender’s method did. Ask which basis applies before an application goes anywhere, because the difference between room-by-room and single-let assessment reshapes the whole deal.

To test your own room rents against both limits, use our HMO mortgage calculator, which covers purchases and remortgages. For landlords modelling a single-let scenario alongside an HMO, our buy-to-let mortgage calculator runs the same ICR test on standard rental income.

How Your HMO Mortgage Broker Handles the Application

1. The property comes first. How many rooms, whether the licence is in place, whether the council has an Article 4 direction on that street, what rents you expect and whether you buy personally or through a company. Those answers narrow the lender list quickly.
2. Then the valuation. The same building can come back tens of thousands of pounds apart on a bricks and mortar basis and on a commercial one. We find out which basis a lender uses before you agree a price.
3. You see the shortlist with our reasoning. Rates and fees differ, so do loan to value limits, and so does the way each lender reads room-by-room rent. We set out the differences in plain terms.
4. We put the file together. Licence evidence, tenancy details and income figures arranged the way underwriters like to read them. Buying something that needs work first? Short-term funding can bridge the gap, and we plan the move onto a term mortgage before the bridge starts. Our page on funding an HMO conversion explains how those two stages connect.
5. We stay on it until completion. Valuation queries, legal questions and lender requests all land with us first, and you hear what is happening and what we propose to do about it.

Current rates are kept on our HMO mortgage rates page, because they change faster than a service page should.

Why Choose Commercial Finance Network as Your HMO Mortgage Broker?

Commercial Finance Network was among the first specialist commercial finance brokers to recognise the potential for growth of HMO housing. We are among the pioneers in designing HMO finance packages based on the potential of the project, so that borrowers can access the LTV and terms their project actually supports.

Beyond the lending terms above, here is what our HMO finance service adds:

• All applications assessed and acted upon within 24 hours
• Specialist knowledge across the widest range of HMO projects, licensed and unlicensed
• Access to specialist HMO mortgage rates across the whole market
• HMO finance packages customised to your requirements and repayment needs
• Over a decade of experience, dealing with real people throughout the process

Talk to an HMO Mortgage Broker

Tell us about the property and what you want to do with it. We will say which lenders are likely to engage, what loan to value and rate to expect, and what needs sorting before you apply. If the HMO is already let, we can arrange a remortgage on it. A case study on first-time bridging for a heavy HMO refurbishment shows the two-stage route in practice.

Commercial Finance Network is directly authorised and regulated by the Financial Conduct Authority. HMO and other business finance is not regulated by the Financial Conduct Authority. Your property may be repossessed if you do not keep up repayments on a loan secured against it.

Call us on 03303 112 646 or 01494 622 111.

Email info@cfnuk.com to discuss HMO finance for your property.