What counts
- HMO: a property let to three or more people from more than one household who share facilities. Five or more people from two or more households needs a mandatory licence in England and Wales; many councils license smaller HMOs under additional schemes. Scotland licenses all HMOs of three or more unrelated people; Northern Ireland has its own scheme.
- Multi-unit freehold block (MUFB): several self-contained flats on a single freehold title, let separately.
How lenders treat them
- Specialist lenders only. Mainstream buy-to-let lenders mostly avoid HMOs above a certain size and MUFBs entirely. The specialists like them, because the yield is higher.
- Valuation. The key question is whether the lender values the property as a house (bricks and mortar, as a single let) or on an investment basis using the actual room-by-room or flat-by-flat rent. Investment valuations are higher for a well-run HMO, and that changes the loan. Ask which basis the lender uses.
- Rental cover on the total rent, usually at 125% to 145% and a stress rate, but some lenders discount the gross HMO rent by 20% to 30% to allow for voids and running costs.
- Licensing. The licence must be in place (or applied for) and in the name of the owner or agent. Lenders check. Article 4 areas, where planning permission is needed to create an HMO, need the planning too.
- Experience. Many HMO lenders want you to have been a landlord for a year or two, sometimes with HMO experience specifically, for larger properties.
- Loan-to-value: 75% is common; some lenders 65% to 70% for larger HMOs.
What to have ready
- The licence, or proof of application, and any planning consent.
- A schedule of rooms or units with rent and tenancy dates.
- Fire risk assessment and safety certificates; HMOs have stricter requirements.
- Floor plans, especially for MUFBs and for anything converted.
- Management arrangements: self-managed or an agent.
Converting a house into an HMO
Buy-to-let lenders lend on the property as it is now. Buying a house to convert usually needs bridging or refurbishment finance, then a remortgage onto an HMO product once it is licensed and let. Plan the exit before you start the works.
A note on the numbers. Rental cover ratios, stress rates, loan-to-value limits and fees are typical of the market at the time of writing (2026) and differ from lender to lender. Tax rules are for individuals and companies resident in the UK and change with each Budget. This is general information, not advice: a broker will tell you what applies to your property, and an accountant what applies to your tax.
Common questions
Do I need an HMO licence to remortgage?
If the property needs one under the council's rules, yes; lenders will not lend on an unlicensed HMO. A pending application is often acceptable.
Will the lender value my HMO on the rent?
Some do (an investment valuation), which usually gives a higher figure; others value it as a single house. It is the first thing a broker checks when choosing the lender.
Can a first-time landlord get an HMO mortgage?
For small HMOs (up to about six rooms), some lenders will. For larger ones, most want prior landlord experience.
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