Why HMOs need a different mortgage
An HMO, a House in Multiple Occupation, is a property let room by room to tenants from different households, typically sharing a kitchen or bathroom. Rent several rooms individually and the income usually beats a single family let comfortably, which is exactly why investors love them.
But most standard buy to let lenders simply won’t touch them. Multiple tenancy agreements, higher wear and tear, licensing obligations and a more management-intensive asset all sit outside their comfort zone. HMO lending lives with specialist lenders: a market with its own criteria, its own valuation approaches and its own quirks. That’s the world I work in every week.
Licensing: know before you buy
Licensing is where HMO plans most often come unstuck. There are three layers to check:
- Mandatory licensing applies across England to HMOs housing five or more occupants from two or more households. No licence, no lawful letting, and lenders will want to see it (or a valid application) before completion.
- Additional licensing schemes let individual councils licence smaller HMOs too, so a three-person house share can need a licence in one borough and not in the one next door.
- Selective licensing schemes require a licence for any privately rented property in designated areas, HMO or not.
Because schemes vary council by council and change regularly, checking the local position is one of the first things I’ll prompt you to do on any HMO purchase.
Planning and Article 4: check before you buy
Separate from licensing sits planning. A normal house is planning class C3; a small HMO of three to six sharers is class C4. Usually, switching from C3 to C4 is permitted development, with no planning application needed. But many councils have made Article 4 directions that remove this right in defined areas, meaning you need full planning permission to convert a house into an HMO there, and it’s frequently refused.
Large HMOs of seven or more occupants are usually sui generis (a class of their own) and need full planning permission regardless of location.
The golden rule: check Article 4 status and planning class before you exchange, not after. Buying a family home in an Article 4 area intending to convert it can leave you owning a property you can never legally run as an HMO. A quick check with the local planning authority costs nothing.
Valuations: bricks-and-mortar vs commercial
HMO valuations come in two flavours, and the difference can be worth tens of thousands in borrowing. A bricks-and-mortar valuation values the property as an ordinary house: what it would fetch on the open market. A commercial (investment) valuation values it on its income, applying a yield to the rent, which can produce a materially higher figure for a strong, established HMO.
As a rule of thumb, smaller HMOs that could easily revert to family homes get bricks-and-mortar valuations. Larger, purpose-configured HMOs (particularly six-plus rooms, sui generis planning or significant reconfiguration) are where some lenders will instruct a commercial valuation. Knowing which lender takes which approach on which property type is one of the most valuable things I bring to an HMO case.
Stress testing HMO income
HMO rents are higher, but don’t assume that makes affordability easy: lenders stress HMOs harder to reflect the higher running costs and voids, with many requiring an Interest Cover Ratio of 130% or more, calculated at a stressed interest rate. Lenders also differ on how much of the gross room income they’ll recognise. The strong rents usually carry the day, but the calculation needs running properly, lender by lender, before you commit.
Experienced vs first time HMO landlords
Many HMO lenders want to see at least 12 months’ experience as a landlord before they’ll lend, and some want HMO-specific experience. That’s not the end of the road if you’re new. There are routes in: a handful of lenders will consider first time HMO landlords, particularly on smaller HMOs with full management by an experienced letting agent; and some investors deliberately start with a standard buy to let for a year to build the track record. I’ll tell you honestly which route fits your situation.
One more thing worth saying: HMO income and expenses have their own tax wrinkles, and how you own the property (personally or through a company) changes the picture. Please speak to a qualified tax adviser alongside the mortgage work.
What I’ll do for you
Sense-check the licensing and Article 4 position, match the property to lenders whose valuation approach suits it, run the HMO stress tests across the specialist market, and manage the application through to completion, including first time HMO landlord routes. Initial chat and research: free. Arrangement fee: £495 on completion.