What is the difference?
A standard BTL is let to a single household under one tenancy agreement. An HMO (House in Multiple Occupation) is let to three or more people from at least two separate households who share facilities such as a kitchen or bathroom. More tenants means more rent — but also more costs, more regulation and more active management.
Gross yield comparison
This example shows how room-by-room income can raise gross yield under the stated assumptions. It is not market evidence; replace every rent and cost with current local evidence.
Cost comparison
| Cost item | Standard BTL | HMO |
|---|---|---|
| Utility bills | Tenant pays | Landlord pays |
| Council tax | Tenant pays | Landlord pays |
| Internet / TV licence | Depends on tenancy | Internet often included; TV licensing depends on who provides live TV and the tenancy setup |
| Letting agent fee | Enter a single-let quote | Enter an HMO quote |
| Maintenance | Lower turnover | Significantly higher |
| Licensing cost | Check local schemes | Council-specific fee and term |
| Void risk | Full income lost | Partial — other rooms pay |
| Mortgage product | Standard BTL range | Specialist HMO required |
Net yield — worked example
Under these example inputs, the gross gap narrows after the assumed bills, management and licensing costs. Use the HMO calculator and single-let calculator with current quotes and achieved local rents.
HMO licensing
In England, mandatory licensing generally covers HMOs occupied by five or more people forming two or more households who share facilities. Councils can also operate additional licensing schemes for smaller HMOs. Scotland, Wales and Northern Ireland use different definitions and licensing systems, so a UK-wide room-count rule is unsafe.
Licence fees and terms are council-specific; a licence can run for up to five years but may be shorter. In England, operating without a required licence is an offence and can lead to civil penalties, rent repayment orders and other enforcement. Check the current requirements with the relevant local authority before letting.
HMO room size standards
| Occupant type | Minimum room size |
|---|---|
| Single occupant (over 10 years old) | 6.51 m² |
| Two occupants sharing | 10.22 m² |
| Cannot be used as sleeping accommodation | Under 4.64 m² |
These are England's mandatory-licence minimums introduced in October 2018. Councils may impose higher local standards, and the other UK nations have their own rules.
Management complexity
Standard BTL
- One tenancy, one point of contact
- Tenant responsible for bills and council tax
- Lower void risk management burden
- Standard AST — straightforward legal framework
- Wide choice of mortgage lenders
- Lower maintenance frequency
HMO
- Multiple tenancies, multiple relationships
- Landlord manages and pays all bills
- Licence compliance, room inspections
- Higher tenant turnover, more void admin
- Specialist mortgage — fewer lenders, higher fees
- Communal area upkeep and tenant disputes
What should the comparison test?
Use achieved room-rent evidence, realistic simultaneous occupancy, tenant turnover, utility exposure, council licensing and planning rules, lender terms, management quotes and a reserve for shared-area maintenance. Compare the HMO with a single-let on the same acquisition cost and stress-test lower occupancy and higher bills.
Neither structure has a guaranteed yield advantage. The HMO scenario must compensate for its property-specific finance, compliance, utilities, occupancy and management assumptions. The worked example and calculators are scenario tools, not investment recommendations.