HMO buy-to-let mortgages: a guide for landlords (including first-timers)

An HMO buy-to-let mortgage is a loan for a property let to several tenants who are not one household, usually room by room with a shared kitchen or bathroom. Fewer lenders offer them than standard buy-to-let mortgages, and the rules are tighter, but they are widely available. First-time landlords can get one too, although the choice of lenders is narrower. Here's how they work.

Updated on 17 September 2026 for current lender criteria and the Renters' Rights Act.

At a glance

What counts

At least 3 tenants from more than one household, sharing facilities

Licence

Mandatory for 5 or more tenants from 2 or more households; many councils license smaller HMOs too

Lenders

Fewer than for standard buy-to-let, and many prefer some landlord experience

Deposit

Often at least 25%, though some lenders go higher on loan to value

Rates

Usually a little higher than a standard buy-to-let mortgage

What counts as an HMO?

In England, a property is a house in multiple occupation (HMO) if at least three tenants live there as their main home, they form more than one household, and they share a toilet, bathroom or kitchen. A household is one person, a couple or a family, so three friends sharing is an HMO but a couple and their child is not.

There are two tiers that matter for both the law and your mortgage:

• Small HMOs have three or four tenants. Nationally they don't need a licence, but many councils run "additional licensing" schemes that cover them. Birmingham, for example, has required licences for HMOs with three or four occupants across the city since 5 June 2023.
• Large HMOs have five or more tenants from two or more households. These need a mandatory licence from the council wherever they are. A licence lasts up to five years, each property needs its own, and renting out an unlicensed HMO can lead to an unlimited fine.

Licensed HMOs must meet minimum bedroom sizes (6.51 square metres for one adult, 10.22 for two), plus the council's own standards on bathrooms, kitchens and fire safety.

Planning permission and Article 4 areas

Planning is separate from licensing. Turning a family home into a small HMO for three to six people (use class C4) doesn't normally need planning permission. But where a council has made an Article 4 direction, it does. Birmingham has had a city-wide Article 4 direction since June 2020, and many other councils use them for some or all of their area. An HMO for seven or more people is "sui generis" and needs planning permission everywhere.

Lenders will want to see that the HMO use is lawful: the right licence and, where relevant, planning consent or proof the property was an HMO before the Article 4 direction.

How HMO mortgages differ from standard buy-to-let

An HMO mortgage works like any buy-to-let mortgage: often interest-only, with the loan size based mainly on the rent. The differences are in the detail.

Experience and property size

Many HMO lenders ask for a year or two of experience as a landlord, and some want HMO experience specifically. Plenty also cap the number of lettable rooms, often at around six. Larger HMOs, especially those for seven or more people, are handled by a smaller group of lenders and sometimes on commercial terms.

Room-let rent and the stress test

Lenders check that the rent covers the mortgage interest with a margin to spare, known as the interest cover ratio (ICR). Under Bank of England rules they usually test at a higher rate than you'll pay, unless the rate is fixed for five years or more, when many use a rate at or near your actual rate.

The cover lenders ask for depends on how you own the property. It's often 125% for limited companies and basic-rate taxpayers, and often 140% to 145% for higher-rate taxpayers buying in their own name. Many HMO lenders use the combined room rents, which can support a larger loan. Others apply a void allowance or a lower figure, so the maximum loan on the same property can vary a lot between lenders.

Valuation: bricks and mortar or investment value

A bricks-and-mortar valuation asks what the property would sell for as an ordinary house. An investment (or commercial) valuation is based on the income it produces. For a well-run, licensed HMO the investment value can be higher, which can help when refinancing after a conversion. Fewer lenders offer it, and the valuer will want the licence, tenancy agreements and rental history.

Deposit and loan to value

Expect a deposit of at least 25% in most cases, although some lenders go to 80% loan to value, often for limited companies or experienced landlords. A bigger deposit usually brings more choice and better rates. Budget too for the higher stamp duty on additional properties, licensing fees, safety works and furnishing.

Personal name or limited company

Many HMO landlords buy through a limited company set up only to hold property, often called a special purpose vehicle (SPV). A company can deduct mortgage interest as a cost, whereas individual landlords get only a basic-rate tax credit, which is partly why the stress test is often easier to pass in a company. Companies bring their own costs, though, and moving property you already own into one is usually treated as a sale. Speak to a tax adviser before choosing.

We are not tax advisers and this is not tax advice. What we say about limited company and personal ownership is a general summary based on the rules published at the time of writing, and we make no warranty about the tax you will pay. Speak to a qualified tax adviser or accountant about your own circumstances.

HMO buy-to-let mortgage rates and fees

HMO mortgage rates are usually higher than standard buy-to-let rates. Fewer lenders compete, each case needs more individual underwriting, and lenders see more that can go wrong: more tenancies, more wear and more regulation. Large HMOs and those on investment valuations tend to cost more. Arrangement fees can also be higher, sometimes set as a percentage of the loan.

Timing matters too. On 17 September the Bank of England held Bank Rate at 3.75%, but three of its nine rate-setters voted for a rise, inflation is 3.1% and climbing, and markets expect rates could go up. That makes the length of your fix important: because a fix of five years or more is often stress tested at or near its actual rate, it can support a bigger loan than a shorter fix on the same rent. Compare the total cost over the deal, including fees, not just the headline rate.

HMO mortgages for first-time landlords

Yes, first-time landlords can get an HMO mortgage, but the choice is narrower and the terms may be less generous. These make an application stronger:

• Owning your own home. Many lenders that accept first-time landlords still require it.
• Realistic room rents, backed by a letting agent's appraisal.
• A professional managing agent, which reassures some lenders.
• Buying an existing licensed HMO rather than converting a house yourself.
• A larger deposit and steady personal income. Many lenders set a minimum income.

Some people start with a standard buy-to-let, or a small HMO before a larger one, to build a track record.

Buy-to-let mortgages for student HMOs

Most HMO lenders accept student lets, though some limit how many you have. Student houses are often let to a group on one joint tenancy, while professional HMOs are usually let room by room. Lenders treat these differently, so tell your broker which you plan to use.

Under the Renters' Rights Act, a new possession ground, Ground 4A, lets you take back a student HMO at the end of the academic year to re-let to new students. All the tenants must be students, you must tell them in writing before the tenancy starts, and you must give at least four months' notice ending between 1 June and 30 September.

What the Renters' Rights Act means for HMO landlords

The main changes in England came into force on 1 May 2026:

• Section 21 "no-fault" evictions have ended, and fixed-term assured shorthold tenancies have been replaced by rolling periodic tenancies.
• Tenants can leave with two months' notice at any time.
• Rent can be increased only once a year, using the formal section 13 process.
• You can't ask for more than one month's rent in advance, or accept bids above the advertised rent.

Still to come are a private rented sector database, which landlords will have to join and which is due to start rolling out from late 2026, and a landlord ombudsman. For more detail, read our guide to the Renters' Rights Act, or what the wider political outlook means for landlords.

How a broker helps with an HMO mortgage

The right HMO lender depends on specifics: the number of rooms, the licence and planning position, personal or company ownership, your experience and the valuation basis. Lenders differ widely on each, and many specialists work mainly through brokers.

At Quick Mortgages we have access to the whole of the market, including specialist HMO lenders, and there are no broker fees for our advice. We can check your plans against lender criteria before you commit, find the stress test and valuation basis that suits your figures, and manage the application through to completion. We're based in Birmingham and help landlords across the UK. See our buy-to-let mortgage and specialist lending pages, or get in touch.

Most buy-to-let mortgages are not regulated by the Financial Conduct Authority. Whether yours is regulated will depend on your circumstances and the purpose of the loan.

HMO mortgage FAQs

What is an HMO buy-to-let mortgage?

A buy-to-let mortgage for a property let to three or more tenants from more than one household who share facilities. Lenders look at the room rents, the licence and planning position, and your experience.

Can I get an HMO mortgage as a first-time landlord?

Yes, some lenders accept first-time landlords. Owning your home, a larger deposit, a steady income and a letting agent can all help.

Are HMO mortgage rates higher than standard buy-to-let rates?

Usually, yes. The gap tends to be wider for large HMOs and those valued on their income.

Which lenders offer HMO buy-to-let mortgages?

Mainly specialist buy-to-let lenders and some building societies. Criteria change often and many products are only available through brokers, so it's worth getting advice before you apply.

Can I get a buy-to-let mortgage for a student HMO?

Yes. Most HMO lenders accept student lets, but check their rules on joint tenancies and on how many student properties you own.

Do I need an HMO licence before I apply?

Not always, but if one is legally needed most lenders will want it in place, or applied for, before completion. Check your council's licensing and Article 4 rules early.

Thinking about an HMO?

Before you make an offer, check three things: whether the property needs a licence, whether it needs planning permission, and whether the room rents will pass a lender's stress test at today's rates.

We can tell you which lenders are likely to consider your plans, with no broker fees.

Speak to an adviser

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Disclaimer:

This article is for general guidance purposes only and does not constitute legal, financial, or professional advice. Mortgage products and their terms can vary, and it is important to seek advice from a qualified, regulated professional who can assess your individual circumstances. Please ensure you consider your unique needs before making any financial decisions.

While every effort is made to ensure that the information provided on this blog is accurate and up-to-date, we do not guarantee its completeness or accuracy. The mortgage market can change rapidly, and the information on this blog may become outdated. We recommend verifying any information before acting on it and seeking tailored advice.

THINK CAREFULLY BEFORE SECURING OTHER DEBTS AGAINST YOUR HOME. YOUR HOME OR PROPERTY MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON A MORTGAGE OR ANY OTHER DEBT SECURED ON IT.