HMO mortgage UK rates, deposits and eligibility

If you're researching an HMO mortgage UK lenders will accept, it helps to start with what actually counts as a house in multiple occupation. An HMO is a property let to three or more unrelated tenants who share facilities such as a kitchen, bathroom or living room. Because rooms are let individually rather than under one tenancy agreement, most standard buy-to-let mortgages aren't suitable - lenders need a product built around room-by-room rental income.

The key difference between a standard buy-to-let mortgage and an HMO mortgage comes down to how the lender assesses income. A standard buy-to-let lender looks at the rent from a single tenancy. An HMO lender totals the expected rent from every room, which is one reason HMOs can offer stronger rental yields than single-let properties - though this needs to be weighed against higher management costs, licensing obligations and void periods between tenants.

When do you need an HMO mortgage?

You'll typically need a dedicated HMO mortgage in these situations:

• You're letting to three or four unrelated tenants sharing facilities (a small HMO)
• You're letting to five or more tenants from two or more households (a large HMO), which triggers mandatory licensing in England
• You already have a buy-to-let mortgage on a property and want to convert it to HMO use - this is a material change of use that your lender must be told about
• Your local council runs an additional or selective licensing scheme that extends licensing requirements to smaller shared properties, so it's worth checking even if you're below the five-tenant threshold

HMO mortgage rates change frequently, and the rate you're offered depends on your individual circumstances, so we don't publish specific figures here - an advisor can check current rates across the market for your situation when you apply. What we can explain is what generally influences the rate a lender offers.

What drives your HMO mortgage rate

• Loan-to-value (LTV): a smaller deposit relative to the property value usually means a higher rate; putting down more than the minimum can unlock better pricing
• Small vs large HMO: large HMOs are generally seen as higher risk by lenders because of the added management and licensing complexity, which can affect pricing and lender choice
• Landlord experience: first-time landlords may have a smaller pool of lenders to choose from than experienced portfolio landlords
• Ownership structure: buying through a limited company typically costs more than buying in your personal name, though it can bring tax advantages depending on your circumstances
• Property condition and licensing: lenders factor in the property's condition, rental demand in the area, and whether the correct HMO licence is in place or applied for

Because pricing varies so much between lenders and circumstances, comparing a wide range of lenders is usually the only reliable way to find out what you'd actually be offered.

Most lenders set a minimum HMO mortgage deposit of 25% of the property's value (75% loan-to-value). Putting down 30-35% can open up a wider choice of lenders and more competitive terms, and some lenders ask for a higher minimum deposit of around 30% on large HMOs with six or more rooms.

For example, on a £250,000 HMO property, a 25% deposit works out at £62,500, while a 30% deposit would be £75,000.

Your deposit can come from personal savings or from equity built up in an existing property - some landlords release equity from their main residence or another buy-to-let to help fund an HMO deposit. If that's something you're considering, our equity release guide explains how it works. Gifted deposits are accepted by some lenders too, though acceptable sources vary, so it's worth checking early in the process.

Remember that any mortgage is a loan secured against your property. Your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it.

HMO mortgage eligibility depends on your experience as a landlord, your income and affordability, and the property itself. Lenders vary considerably in what they'll accept, which is why comparing a wide range of lenders can make a real difference if your circumstances aren't entirely straightforward.

Landlord experience

Most lenders want to see at least 12 months' experience owning a buy-to-let property before considering you for an HMO mortgage. That said, a number of specialist lenders will accept first-time landlords for small HMOs, typically three to four bedrooms, so it's not an automatic barrier if you're just starting out.

If you own four or more mortgaged properties, you're classed as a portfolio landlord. Lenders apply additional affordability checks across your whole portfolio, in line with the Prudential Regulation Authority's underwriting standards for buy-to-let lending. In practice, this means your existing properties' rental income and mortgage costs are assessed alongside the new HMO application, not just the HMO in isolation.

Income and affordability

Income and affordability are usually assessed on the property's rental income rather than your personal salary, using an interest coverage ratio that compares expected rent against mortgage costs at a stress-tested rate set by the lender. Self-employed applicants and those with more complex income can usually still be considered by specialist lenders, though two years' accounts are typically required. Adverse credit, such as an older CCJ or a satisfied default, doesn't automatically rule you out either - an advisor can point towards adverse credit buy-to-let options where appropriate.

Property criteria

The property itself needs to meet the lender's criteria too. Most lenders set a minimum property value of around £75,000 to £100,000, and the property must be in a lettable condition at the point the mortgage completes. You'll also need the correct HMO licence in place, or evidence that you've applied for one, before most lenders will release funds.

You'll need the correct HMO licence in place, or evidence that you've applied for one, before most lenders will release mortgage funds. Letting an HMO without a licence where one is required is a criminal offence. You can be fined, and you may have to repay rent to your tenants or the council, so it isn't a step to skip.

Types of HMO licensing

• Mandatory licensing: applies to properties with five or more tenants forming two or more households in England. In Wales, the property must also have three or more storeys
• Additional licensing: some local councils extend licensing to smaller HMOs in their area, so it's worth checking with your local authority even if you're below the mandatory threshold
• Selective licensing: a small number of areas require a licence for all privately rented properties, regardless of size

Licence fees vary by local authority and property size, typically ranging from around £500 to £1,500, and a licence usually lasts around five years before it needs renewing. These requirements come from the Housing Act 2004.

Separately from licensing, it's worth checking your property's planning use class. Small HMOs usually fall under use class C4, while larger HMOs are typically treated as sui generis. Some lenders ask about this at application stage, and your council can sometimes require planning permission for a change of use.

Planning permission and Article 4 Directions

Planning rules sit alongside licensing, and lenders may ask about both. In England, national permitted development rights let you turn a family home (use class C3) into a small HMO for up to six residents (use class C4) without applying for planning permission. A council can withdraw that right for a chosen area by making an Article 4 Direction, so inside an Article 4 area you need full planning permission before you let the property as an HMO, even to three or four tenants. An HMO for more than six residents falls outside class C4, so changing a house to that use normally needs planning permission wherever it is.

Many lenders want proof that the HMO use is lawful before they agree to lend. That proof is usually the planning permission itself or a lawful development certificate from the council, which confirms that an existing use is lawful for planning purposes. Check the planning position before you make an offer or start a conversion, because a missing permission can hold up a purchase or a remortgage onto an HMO product.

Room sizes and other licence conditions

Every HMO licence issued by a council in England must include minimum bedroom sizes. A room used for sleeping by one person aged over 10 needs a floor area of at least 6.51 square metres, and a room shared by two people aged over 10 needs at least 10.22 square metres. A room for one child under 10 needs at least 4.64 square metres, and no room smaller than 4.64 square metres can be used for sleeping. These limits are set by the Licensing of Houses in Multiple Occupation (Mandatory Conditions of Licences) (England) Regulations 2018.

Room sizes feed straight into your mortgage. Lenders work out affordability from the rent the rooms can earn, so a bedroom that is too small to let lawfully may be left out of the rental figure and reduce how much you can borrow. The council also checks that the proposed licence holder and manager are fit and proper people, looking at matters such as relevant criminal offences and past breaches of housing or landlord and tenant law, as set out in section 66 of the Housing Act 2004.

Licensing in Scotland and Wales

Licensing rules aren't the same across the UK. In Scotland, all HMOs require a licence regardless of the number of tenants, under separate housing legislation. In Wales, mandatory licensing only covers HMOs with three or more storeys and five or more people from two or more households, all landlords must register with Rent Smart Wales, and lettings follow the Renting Homes (Wales) Act 2016. If you're letting outside England, check the specific rules for your nation rather than assuming the mandatory licensing threshold applies in the same way.

Safety checks for an HMO in England

Licensing comes with ongoing safety duties, and a valuer or lender may ask to see the paperwork before completion:

• Gas: every gas appliance and flue must be safety checked at least once every 12 months under the Gas Safety (Installation and Use) Regulations 1998. HMO licence holders also have to give the council a current gas safety certificate each year.
• Electrics: a qualified person must inspect and test the electrical installation at least every five years under the Electrical Safety Standards in the Private Rented Sector and Social Rented Sector (England) Regulations 2020.
• Fire safety: the manager must keep escape routes clear and keep fire alarms and fire-fighting equipment working, under the Management of Houses in Multiple Occupation (England) Regulations 2006.

Standard landlord policies do not always cover shared houses, so check that your insurance covers HMO use. The landlord insurance guide explains the main types of cover.

Many specialist HMO lenders take applications only through a mortgage broker, so advice is usually the way to see the full range of HMO products rather than an extra step. A broker who arranges HMO lending regularly will look at the property, the licence and your plans together before suggesting a lender, because one detail, such as a pending licence application or a bedroom below the minimum size, can change which lenders will consider the case.

It helps to have these details ready when you ask for advice:

• How many bedrooms can be let, how many tenants you plan to house and which facilities they will share
• Whether the property already holds an HMO licence, or how far your application has got
• The planning position, including whether the council has made an Article 4 Direction covering the street
• The expected rent for each room and details of any current tenancies
• Whether you plan to buy in your own name or through a limited company
• Any other rental properties you own and the mortgages on them

With this information at the start, an advisor can check which lenders are likely to accept the property before you apply, which lowers the risk of a declined application.

Buying an HMO through a limited company, usually a special purpose vehicle (SPV) set up solely to hold property, has become increasingly common since 2017, when changes to mortgage interest tax relief made personal ownership less tax-efficient for many landlords in higher tax bands.

Which structure suits you depends on your personal tax position, how many properties you own, and your long-term plans. This isn't something we can advise on directly, as it strays into tax advice, so it's worth speaking to a qualified accountant or tax advisor alongside your mortgage advisor. You can find more detail on Stamp Duty Land Tax on the government's website.

If you already have a standard buy-to-let mortgage and want to start letting the property as an HMO, you need to tell your lender before you make the change. Switching to HMO use is a material change to how the property is let, and continuing without permission could put you in breach of your mortgage terms.

Some lenders will give consent to change the tenancy type without a full remortgage. Others will ask you to remortgage your buy-to-let onto a dedicated HMO product. Which route is available depends on your current lender and how the property will be let going forward.

If you're still within a fixed-rate period, check for early repayment charges before switching - these can be significant and should be weighed against the potential rental uplift from converting to an HMO. HMO remortgage applications typically take longer than standard buy-to-let remortgages, often six to ten weeks, because lenders require a specialist valuation that reflects the property's investment or room-by-room rental basis rather than a standard valuation.

As with any mortgage, your home may be repossessed if you do not keep up repayments on your mortgage or any other debt secured on it, so it's worth thinking carefully before taking on additional borrowing to fund a conversion. If you're at all worried about managing repayments, independent guidance is available from MoneyHelper (moneyhelper.org.uk, 0800 138 7777).

Applying for an HMO mortgage follows a similar shape to a standard buy-to-let application, with a couple of extra steps around licensing and valuation. Because HMO mortgages are typically arranged through a broker, it's worth checking that whoever you're speaking to is authorised - you can look up any firm on the Financial Conduct Authority Register. Here's what to expect from start to finish.

An HMO mortgage suits a property that is ready to let room by room. A few situations call for a different kind of finance, at least to begin with:

• The property needs work before it can be let. A house that still needs converting, or bringing up to licensing standards, may not meet an HMO lender's condition requirements yet. Some landlords fund the purchase and the works with refurbishment bridging finance, then refinance onto an HMO mortgage once the property is licensed and let. Bridging is short-term borrowing, so you need a clear plan for repaying it before you start.
• The building is very large or mixed-use. Where a property has a high number of lettable rooms, or combines rooms with a shop or office, some lenders treat it as a commercial mortgage case rather than residential buy-to-let.
• Each unit is fully self-contained. If every unit has a kitchen, bathroom and front door of its own, the building is usually treated as a multi-unit freehold block rather than an HMO, and needs a different type of mortgage.

An advisor can confirm which route fits the property before you commit to a purchase.