| HMO definition | 3+ tenants from 2+ households sharing facilities |
|---|---|
| Mandatory licence | 5+ tenants from 2+ households (England) |
| Typical LTV | Up to 75%, sometimes 80% |
| Valuation basis | Bricks-and-mortar or investment value |
| Experience required | Often prior letting experience |
| FCA regulation | Not regulated |
Who is this for?
- Landlords buying an existing licensed HMO
- Investors converting a house into an HMO
- Owners refinancing an HMO after works or licensing
- Landlords letting to students or young professionals
What counts as an HMO?
In England, a property is usually an HMO if at least three tenants from more than one household share facilities such as a kitchen or bathroom. A "large" HMO, with five or more tenants from two or more households, needs a mandatory licence from the council.
Many councils also run additional or selective licensing schemes that cover smaller HMOs. Some areas use planning controls (Article 4 directions) that require planning permission to convert a family home to a small HMO. Check local rules before you buy. Scotland, Wales and Northern Ireland have their own regimes.
How do HMO mortgages differ from standard buy-to-let?
Fewer lenders offer HMO mortgages, and criteria are tighter. Lenders typically look at:
- Your landlord experience, often at least one or two years
- The number of rooms and the type of tenants
- A valid licence, or evidence one is being applied for
- Room rents and how the rent cover test applies
- Whether the property is valued on bricks-and-mortar or investment value
Larger HMOs may be valued on their income, which can produce a higher value than a comparable house. Not all lenders accept this method. Very large HMOs may need a commercial mortgage.
Can I finance an HMO conversion?
Yes, but usually in stages. Many investors buy a house with a bridging loan or refurbishment finance, complete the works and obtain the licence. They then refinance onto an HMO mortgage based on the new value and rent.
Bridging finance is expensive short-term borrowing. You need a clear exit, realistic costs and a contingency for delays. Planning, building regulations and licensing must all be in place before the long-term lender will usually proceed.
What are the risks of HMO investing?
HMOs can deliver higher yields, but they involve more work and risk. Tenant turnover is often higher, and bills are usually included in rent. Management standards are stricter, with fire safety, room size and amenity rules.
In England, the Renters' Rights Act began coming into force from 1 May 2026. It changes how tenancies, including room lets, can be ended. Energy standards are also rising. Build these costs into your plans before you buy.
How do lenders work out HMO affordability?
Most HMO lenders add up the room rents and apply a rent cover test at a stressed rate, much like standard buy-to-let. Some use a higher cover ratio for HMOs because of the extra running costs.
Where bills are included in the rent, lenders may deduct an allowance or ask the valuer to confirm a realistic rent. A tenancy schedule showing current room rents and occupancy can strengthen your application. Our ICR guide explains the basic test.
How does OMB help HMO landlords?
OMB is an independent, whole-of-market broker. We know which lenders accept first-time HMO landlords, larger HMOs, student lets and limited company ownership. We check your licensing position and rent schedule, then recommend lenders whose criteria fit. We also arrange bridging finance for conversions where needed. See our portfolio landlord page if you own four or more mortgaged properties.
Run the numbersMaximum loan from rent using lender ICR stress tests (125% / 145%).
Buy-to-let calculatorHow we arrange it
- Free 15-minute call about the property and plans
- Check licensing, planning and room rents
- Compare specialist HMO lenders
- Application, valuation and legal work managed
- Completion, or refinance after conversion
Example cases
Illustrative examples based on the type of case we arrange. Not specific clients; every case is different.
£356,250 HMO mortgage at 75% LTV for a landlord's first licensed six-bed HMO
£255,000 HMO refinance at 75% LTV after converting a family house in Coventry
£937,500 at 75% LTV for an eight-bed sui generis HMO in Lewisham
From the blogHMO mortgages: licensing, Article 4 and how lenders value HMOs
Read the articleFrequently asked questions
What is an HMO mortgage?
It is a buy-to-let mortgage designed for houses in multiple occupation, where several unrelated tenants share facilities. Lenders assess room rents, licensing and the landlord's experience. Fewer lenders offer HMO mortgages than standard buy-to-let. Criteria are usually tighter, with checks on licensing, room numbers and experience.
Can a first-time landlord get an HMO mortgage?
Some lenders accept first-time landlords for smaller HMOs, but most prefer some letting experience. Expect stricter criteria and possibly a larger deposit. Using a professional managing agent can help your case. Some lenders also set a minimum personal income. A clear plan for licensing, safety and management will help your application.
Do I need an HMO licence before getting a mortgage?
Lenders usually want a valid licence, or evidence that one has been applied for, where licensing applies. In England, large HMOs with five or more tenants from two or more households always need one. Councils may license smaller HMOs too.
How much deposit do I need for an HMO?
Most HMO lenders ask for at least 25%, lending up to 75% loan-to-value. A few go to 80% for experienced landlords. The valuation method used can significantly affect the loan size. The stamp duty surcharge for additional properties usually applies. Allow for licensing, furnishing and safety costs in your budget too.
How are HMOs valued for a mortgage?
Either on bricks-and-mortar value, as if it were a normal house, or on investment value based on the rental income. Investment valuation can be higher for larger HMOs but is offered by fewer lenders. The valuer will also look at the licence, condition and local demand.
Can I buy an HMO through a limited company?
Yes. Many HMO lenders accept limited company borrowers, typically SPVs. The usual company requirements, such as personal guarantees, will apply. Take tax advice on whether a company suits you. Companies can usually deduct mortgage interest as a cost, but company mortgages can be more expensive, and extracting profits may create further tax.
What is an Article 4 direction?
It is a local planning rule that removes the automatic right to convert a family house into a small HMO. In those areas, you need planning permission first. Always check with the council before buying a property to convert. Existing HMOs may already have the right planning use.
Are HMO mortgages regulated?
No. HMO mortgages are investment lending and are not regulated by the Financial Conduct Authority. Some consumer protections may therefore not apply. That includes, in most cases, access to the Financial Ombudsman Service for complaints about the lender. OMB still advises to the same professional standards, and will confirm any broker fee before you proceed.
How many bedrooms can an HMO mortgage cover?
It depends on the lender. Many mainstream HMO lenders cover up to six or eight rooms. Larger HMOs, sometimes called large-scale or sui generis HMOs, may need specialist or commercial lenders. The valuer will also consider room sizes, amenities and local demand when assessing the property.
Important: Most buy-to-let mortgages are not regulated by the FCA. Your property may be repossessed if you do not keep up repayments, and a receiver of rent may be appointed.