An HMO mortgage is a buy to let mortgage designed for a house in multiple occupation: a property let to three or more tenants who form more than one household and share facilities such as a kitchen, bathroom or lounge. Think of a five bedroom house let room by room to five working professionals, or a student house near a university. A standard buy to let mortgage normally requires the whole property to be let to a single household on one tenancy, so if you plan to let rooms to unrelated occupants on multiple tenancies you need an HMO mortgage product. HMO mortgages work in much the same way as any buy to let mortgage: the lender assesses the rental income, the property value and you as the borrower. The differences are in the detail. Lenders want to see the HMO licence or planning permission where it is required, they value the property differently depending on its size, and interest rates tend to be a little higher because the market is more specialist.
Our HMO mortgage advice is completely fee free. We are paid by the lender when your mortgage completes and we never charge a broker fee, whether it is your first small HMO or your twentieth. Key information about how we are paid is always given in writing before you apply.
On paper an HMO mortgage looks just like a standard buy to let mortgage: a deposit, a rental income assessment and a choice of fixed rate or variable rate products. Underneath, the lending criteria are noticeably different, and choosing a lender whose criteria match your property is most of the job. Here is where the two part company.
On a standard buy to let the lender uses one rent for the whole property. On an HMO they add up the rent from every room, sometimes knock off 10 to 20% for void periods and management, and use that figure in the affordability assessment. Because five rooms earn far more than one family, HMOs pass the rental calculation more easily than almost any other buy to let.
Small HMOs are valued as a normal house. Larger HMOs may be valued on an investment basis that reflects the rental yield, which can be higher than the market value of the bricks and mortar. The valuation fee is often higher too, and a surveyor who does not understand HMOs can down value a good property, so we choose lenders whose panel surveyors know the HMO market.
HMO mortgage rates tend to be a little higher than standard buy to let rates and product fees are often 1 to 2% of the loan. The difference is usually more than covered by the extra rent, but it makes comparing the total cost over the fixed rate period, rather than the headline rate, especially important.
Some lenders only accept a single tenancy agreement for the whole property, which suits student lets. Others are happy with multiple tenancies, one per room, which is how most professional HMOs run. A few will not accept tenants on benefits or corporate lets. We match the lender to how you actually intend to let the property.
A standard buy to let rarely needs anything from the council. An HMO may need a licence, planning permission or both depending on its size and the local regulations. Lenders will ask for evidence, and the mortgage offer is often conditional on the licence being in place or applied for.
Most lenders want you to have owned a buy to let for at least 12 months before they will lend on an HMO, and the more complex the property, the more experience they expect. Experienced landlords and portfolio landlords get the widest choice and the best HMO mortgage rates.
| What lenders look at | Standard buy to let | HMO mortgage |
|---|---|---|
| Tenants | One household on one tenancy | Three or more tenants, more than one household, shared facilities |
| Number of lenders | Most buy to let lenders | A select number of specialist lenders and some larger buy to let lenders |
| Minimum deposit | Typically 20 to 25% | Typically 25%, a few lenders at 20% |
| Rental income used | Single rent for the whole property | Total room rents, sometimes discounted for voids |
| Valuation | Market value with vacant possession | Market value for small HMOs, investment or yield basis possible for large HMOs |
| Landlord experience | First time landlords widely accepted | Usually 12 months as a landlord, some lenders accept first time landlords for small HMOs |
| Licensing | Not normally required | Mandatory for large HMOs, additional or selective licensing in many areas |
| Interest rates and fees | Lowest in the buy to let market | Slightly higher rates, product fees often 1 to 2% of the loan |
Criteria vary depending on the lender and change regularly. This table is a general guide as at September 2026, not a statement of any one lender's terms.
Every lender publishes its own HMO mortgage criteria and they are surprisingly different. One will take a 12 bedroom property in a limited company, the next stops at six rooms and wants an individual borrower. These are the things we check against each lender before we submit a case, so it goes to one that will say yes.
Most lenders want 12 months as a landlord, and some want 12 months as an HMO landlord for large HMOs. Experienced landlords with multiple properties unlock the widest range of HMO mortgage products. First time landlords have options for small HMOs, but fewer of them.
Expect a minimum deposit of 25%, so 75% LTV. A small number of lenders go to 80% for strong cases. Many set a minimum property value, often around £100,000, and some cap the loan on larger HMOs.
Number of bedrooms and storeys, kitchen and bathroom ratios, room sizes, whether rooms have locks, fire doors and alarms, and the overall condition. Lenders often set a maximum number of rooms, typically 6, 8, 10 or 20, and some exclude properties above three storeys.
Where a licence or planning permission is required, the lender wants proof it is in place or applied for. In Article 4 areas they will ask about the planning position even for a small HMO, and a property being run as an HMO without the right permissions will be declined.
Students, working professionals, tenants receiving benefits, corporate lets and holiday lets are all treated differently. Single tenancy or multiple tenancies, and whether the rooms are let by the room or the whole property, all feed into which lenders will consider the case.
Lenders generally want UK residents aged 21 or over, a clean or explainable credit history, and often a minimum personal income of around £25,000, although some have no minimum. Self employed applicants and limited company SPVs are both widely accepted. Expats and foreign nationals have a smaller but real choice.
Licensing is the part of HMO investing that catches people out, and it is the first thing an underwriter checks. The rules differ between England, Wales, Scotland and Northern Ireland, and then again between one local authority and the next. Here is the short version, though you should always confirm with the council for the property's postcode.
Mandatory licensing applies to any HMO occupied by five or more people forming two or more households, whatever the number of storeys. Many councils also run additional licensing for smaller HMOs and selective licensing for all rented property in certain streets or wards. Licences usually last up to five years and come with conditions on room sizes, fire safety and management.
Similar mandatory licensing for larger HMOs, plus every landlord and agent must be registered and licensed with Rent Smart Wales. Several Welsh councils, including Cardiff and Swansea, have additional licensing schemes covering smaller HMOs in student areas.
Scotland licenses every HMO. If three or more unrelated people from more than one family share a property as their main home, it needs an HMO licence from the local authority before it is let. Lenders active in Scotland will want to see it.
HMO licensing in Northern Ireland is run by Belfast City Council on behalf of all councils. Any property let to three or more people from more than one household needs a licence. Fewer lenders offer HMO mortgages in Northern Ireland, so lender choice matters even more.
Normally a house can switch between a single family home (use class C3) and a small HMO of up to six people (use class C4) without planning permission. In an Article 4 area the council has removed that right, so you need planning permission even for a small HMO. HMOs for seven or more people are sui generis and always need permission. Lenders will not lend on an HMO that is being run without the planning it needs.
Expect the licence to require interlinked fire alarms, fire doors, emergency lighting on escape routes, minimum room sizes and adequate kitchen and bathroom facilities for the number of tenants. The property needs an EPC rating of E or better to be let at all. Lenders may ask for the fire risk assessment, gas and electrical certificates and the licence conditions as part of the application.
Buying a property that is already licensed does not mean the licence transfers to you. You will need to apply in your own name, or your company's name, and most councils want the application in before or shortly after completion. We build this into the timeline so the mortgage offer and the licence line up.
Enter the property value, your deposit, the number of lettable rooms and the average rent per room. The calculator applies a void allowance, stress tests the rent at a typical lender rate with a 125% income coverage ratio, and shows the loan to value and the maximum loan the rental income supports. Change the stress rate or ICR to see how different lenders would view the same HMO.
For illustration only and not financial advice. Every HMO mortgage lender uses its own stress rate, coverage ratio, void allowance and valuation method, so the maximum loan will vary depending on the lender and the property. Your property may be repossessed if you do not keep up repayments on your mortgage.
The maximum loan on an HMO mortgage is set by two limits and you get the lower of them. The first is loan to value (LTV). Most lenders offer HMO mortgages up to 75% of the property value or purchase price, whichever is lower, so the minimum deposit is normally 25%. A few specialist lenders go to 80% for experienced landlords with a strong track record. The second limit is the affordability assessment based on rental income. The lender takes the rent from every room, sometimes applies a discount for void periods, and checks that it covers the mortgage interest at a stressed rate by a set margin, typically 125% for limited company applicants and basic rate taxpayers and up to 145% for higher rate taxpayers. Because HMO rooms add up to a much higher total rent than a single let, the rental calculation is rarely the limiting factor. In practice the maximum loan on an HMO is usually driven by the deposit you have and, for large HMOs, by how the surveyor values the property. A five year fixed rate is often stress tested at a lower rate than a two year deal, which can increase the maximum loan on tighter cases. Use the HMO mortgage calculator below for a rough idea, then speak to us for accurate figures based on the lenders that fit your circumstances.
HMOs are popular because the rental yield is high, often 8 to 12% gross compared with 4 to 6% on a standard buy to let. The costs are higher too, and a good broker will make sure you go in with your eyes open. Here is what to budget for.
HMO mortgage rates tend to sit above standard buy to let mortgage rates. Most HMO landlords choose interest only mortgage products, so the monthly repayments are the interest alone and the capital is repaid when the property is sold or refinanced. A 5 year fixed rate gives certainty on the biggest cost and is often stress tested more gently, which can increase the maximum loan.
Product fees on HMO mortgages are commonly 1 to 2% of the loan, sometimes a flat £1,995 to £2,995. The valuation fee reflects the extra work involved and can run to several hundred pounds, though some lenders offer a free valuation on selected products. Legal costs are a little higher because the solicitor checks the licence and tenancies as well as the title.
An HMO licence typically costs between £500 and £1,500 per property and lasts up to five years. Add fire safety equipment, annual gas and electrical certificates, and any works the council requires as a condition of the licence.
Rooms turn over more often than whole houses, so budget for void periods and re letting costs. Most HMO rents include bills, so the landlord pays council tax, utilities and broadband. Wear and tear is higher with multiple tenants, and management fees for a professionally managed HMO are usually 10 to 15% of the rent.
The additional property surcharge applies whether you buy personally or through a company. Our stamp duty calculatorshows the figure for any purchase price. Because HMO profits are high, many landlords hold them in a company; see our limited company buy to let mortgagespage for how that works.
Usually, yes, provided the property is in an area with steady demand from students or working tenants and you have the time or the agent to manage it properly. We are happy to run the income projections with you before you commit, and we will tell you if the numbers do not stack up.
We are FCA authorised intermediaries with over 20 years' experience in residential and buy to let lending, and HMO cases are a regular part of our week. Whether you are buying an existing HMO, converting a house into one or refinancing an HMO you already own, this is how the process runs.
How many rooms, who the tenants will be, whether it is already licensed, and whether you are buying personally or through a company. If you already own rental property, our portfolio landlordguide explains how lenders will look at the rest of your properties.
We check the number of rooms, the licensing position, your landlord experience and the tenancy structure against every lender's HMO mortgage criteria, then compare the total cost of the products that fit. You get a clear recommendation and the reasons behind it.
We secure a decision in principle so you can negotiate with confidence, then submit the full application with the licence, tenancy and income evidence the lender needs. The valuation is instructed and, once the surveyor is happy, the HMO mortgage offer is issued, usually within four to eight weeks.
Your solicitor completes the purchase and, where required, the HMO licence application goes in to the local authority in your name. We diarise the end of your fixed rate and get in touch before it ends so you are never left on a lender's standard variable rate.
Most standard buy to let lenders will not allow you to convert a property into an HMO on their mortgage. The usual route is to buy with a bridging loan or a refurbishment product, complete the works and licensing, then refinance onto a long term HMO mortgage, often on the new investment value. We can arrange both stages so the exit is agreed before you start.
Already own an HMO? A remortgage can cut your rate, release equity for the next purchase or move the property onto a lender that values it properly. Read our buy to let remortgagepage or call 03300 432 428 to talk it through.
HMO lending sits alongside the rest of our buy to let advice. These guides cover the other questions HMO landlords ask us most, from fixed rate products to portfolio landlord rules and landlord insurance.
Fixed rate BTL mortgages lock in your interest rate for a set period, keeping monthly costs predictable. Tracker mortgages follow the Bank of England base rate and often carry lower early repayment charges, ideal if you want more flexibility.
Own four or more mortgaged buy to let properties? You are a portfolio landlord. Lenders must assess your entire portfolio (total borrowing, rental income and void periods) at each new application. We help you navigate the criteria.
Want to keep your current home and move on? A let to buy mortgage converts your existing property into a buy to let, releasing equity to fund your new purchase. We arrange both mortgages together as part of the same process.
It is possible to purchase a buy to let property as your first ever property. Lender criteria differs from a standard residential application. We explain what is involved and which lenders will consider first-time landlords.
Standard home insurance does not cover missed rental payments, tenant damage or landlord liability. Specialist buy to let insurance, or portfolio cover for multiple properties, protects your investment properly.
Under the Rent Act 1977, some tenants have the right to remain in a property even if it is sold. Sitting-tenant properties are often priced lower, but many mainstream lenders will not finance them. We know which specialist lenders will.
In England and Wales a property is an HMO when at least three tenants live there forming more than one household and they share a toilet, bathroom or kitchen. A household is a single person or members of the same family living together, so a couple and their friend renting together is an HMO, while a family of five is not. Scotland and Northern Ireland use similar definitions based on three or more unrelated occupants.
Normally 25% of the purchase price or property value, whichever is lower. A few lenders accept 20% from experienced landlords on smaller HMOs. Larger deposits unlock lower interest rates and a wider choice of lenders, and cash from a remortgage of another property is perfectly acceptable as a deposit.
Yes. Most lenders that offer HMO mortgages will lend to a limited company SPV with the right SIC codes, and many HMO landlords choose this route because the higher profits make the corporation tax treatment attractive. Directors give a personal guarantee. Our limited company buy to let page explains the pros and cons in detail.
Usually not without the lender's consent, and most standard buy to let lenders will refuse because their mortgage was priced for a single household. Letting to multiple tenants without permission is a breach of your mortgage conditions. The safe route is to remortgage onto an HMO mortgage product before you change the way the property is let.
Allow four to eight weeks from application to offer, and a little longer for large HMOs valued on an investment basis. Having the licence, floor plans, tenancy agreements and fire safety documents ready when you apply speeds things up considerably, which is why we ask for them up front.
Students are accepted by most HMO lenders, sometimes with a requirement for a single joint tenancy or guarantors. Tenants receiving benefits are accepted by many but not all lenders. Corporate lets, short term lets and holiday lets are treated separately and need a lender that specifically allows them. Tell us who the tenants are and we will pick accordingly.
Jamie is the founder of Alexander Southwell Mortgage Services and has over 20 years' experience in residential and buy to let lending, including specialist HMO and portfolio cases. He advises landlords across the UK from the firm's office in Romsey, Hampshire, and is regularly quoted in the national press on mortgage and landlord issues. Alexander Southwell Mortgage Services is authorised and regulated by the Financial Conduct Authority, FCA number 1011890. Page last reviewed September 2026. Meet the teamor read our client reviews.
Your property may be repossessed if you do not keep up repayments on your mortgage. Most buy to let and HMO mortgages are not regulated by the Financial Conduct Authority. Licensing and planning rules vary by local authority and change over time, so always check with the council for the property's address.
