What is an HMO?
A house in multiple occupation is a property let to three or more people from two or more households who share facilities such as a kitchen or bathroom. A "large" HMO has five or more occupants from two or more households and needs a mandatory licence in England.
Converted blocks of flats that do not meet current building regulations can also be classed as HMOs. HMOs typically produce higher gross rent than a single let, but they need more management, more compliance and more specialist lending.
Which licence do I need?
- Mandatory licensing: HMOs with five or more people forming two or more households.
- Additional licensing: many councils extend licensing to smaller HMOs of three or four people.
- Selective licensing: some areas license all privately rented homes.
Licences carry conditions on room sizes, fire safety and facilities. Lenders will usually ask to see the licence, or confirmation an application is under way. Operating without a required licence can lead to fines and rent repayment orders.
What is an Article 4 direction and why does it matter?
Converting a family home into a small HMO is normally permitted development. In areas with an Article 4 direction, you need planning permission instead. Many London boroughs and university cities have them.
Lenders check planning status. An HMO operating without required permission may be valued as a single house or declined. Always ask your solicitor to confirm planning use class and any lawful development certificate.
How do lenders value an HMO?
There are two main approaches.
| Method | How it works | Usually applies to |
|---|---|---|
| Bricks and mortar | Value as if sold as a normal house | Smaller HMOs, most mainstream lenders |
| Investment (yield) basis | Value based on rental income and local investor yields | Larger licensed HMOs, specialist lenders |
An investment valuation can be higher than bricks and mortar, which may support more borrowing. Valuers need evidence of comparable HMO sales and rents.
How do lenders assess HMO rent?
Lenders usually add up the achievable rent for each room, often using a valuer's opinion rather than your own figures. They then test that total against a stressed interest rate. Because HMOs have higher running costs, some lenders use a higher interest cover ratio than for single lets.
Bills-inclusive rents are common in HMOs. Lenders may look at rent net of utilities, so keep evidence of costs. Room rents in student areas can be seasonal, which valuers will also consider.
What do lenders look for in the borrower?
Many lenders want at least one year of landlord experience for small HMOs, and more for large ones. Some accept first-time HMO landlords with a managing agent. Typical maximum loans are around 75% of value. Rental cover is tested on the room-by-room rent, often with a higher stress than standard buy-to-let.
How the Renters' Rights Act affects HMOs
Since 1 May 2026, HMO tenancies in England are periodic, and Section 21 has gone. Each room tenancy can end on its own timescale, so churn and void management matter more. Student HMO landlords may use a specific possession ground if they meet the notice conditions. HMOs must also meet EPC C by 1 October 2030, subject to exemptions.
Running costs to budget for
- Licence fees, which vary by council.
- Utilities, broadband and council tax if bills are included.
- Fire safety maintenance and annual checks.
- Higher wear and tear, cleaning and turnover costs.
- Management fees, usually higher than for single lets.
Small HMO or large HMO?
Small HMOs of three to four tenants have a wider lender pool and are easier to resell as family homes. Large HMOs of five or more can produce higher rent but need a mandatory licence, more management and specialist lenders. Many landlords start small and scale up once they have a track record. Your choice affects valuation, lender options and exit.
Pre-purchase checklist
- Confirm licence type and whether it transfers to you.
- Check Article 4 and planning use class.
- Get room-by-room rental evidence.
- Budget for fire doors, alarms and room size compliance.
- Ask which valuation basis your lender will use.
- If converting, consider bridging finance first, then refinance.
HMO mortgages for investment are generally not regulated by the FCA. Properties may be repossessed if repayments are not maintained.
HMO mortgagesMortgages for houses in multiple occupation, from small shared houses to large licensed HMOs.
Explore hmo mortgagesFrequently asked questions
Do I need a licence for a small HMO?
Not always. Mandatory licensing in England applies to HMOs with five or more occupants from two or more households. Many councils run additional licensing schemes covering three- and four-person HMOs, so check with the local council before you buy. Licences usually last up to five years and carry conditions on safety and room sizes.
Can I get an HMO mortgage as a first-time landlord?
Some lenders will consider first-time HMO landlords, particularly for smaller properties or where a professional managing agent is used. Choice is wider with at least a year's landlord experience. Larger HMOs usually need a proven track record. Lenders will also look at your income, credit history and the property's licensing and planning status.
What is an Article 4 direction?
It is a council order that removes permitted development rights in a defined area. For HMOs, it means converting a family house to a small HMO needs planning permission. Buying in an Article 4 area without the right permission can restrict lending.
Will an HMO be valued higher than a normal house?
Sometimes. Specialist lenders may value larger licensed HMOs on an investment basis, using rent and local yields, which can produce a higher figure. Many mainstream lenders use bricks-and-mortar valuations instead. The valuer will need local evidence of comparable HMO sales and rents. Ask which method a lender uses before you apply.
What deposit do I need for an HMO?
Typically at least 25%, as many HMO lenders cap borrowing at around 75% of value. Some may go higher on certain products, and the rental cover test may limit the loan further. Expect to fund stamp duty, legal fees and any compliance works separately.
Can I convert a house to an HMO with a mortgage?
Light conversions may be possible with some lenders, but larger works are often funded with a bridging loan or refurbishment finance, then refinanced onto an HMO mortgage once licensed and let. Some lenders offer refurbishment-to-let products that combine both stages in one facility.
Important: This guide is general information, not personal advice. Rules, rates and lender criteria change; speak to an adviser about your circumstances. Your home may be repossessed if you do not keep up repayments on your mortgage.