HMO vs Single Let Comparison
Houses in Multiple Occupation (HMOs) are a popular strategy for maximising rental income from a single property — renting individual rooms rather than the property as a whole. The income can be significantly higher, but so are the costs, compliance requirements, and management complexity. This calculator compares the financial outcomes of HMO versus single-let operation on the same property, helping you decide which strategy is right for you.
Why this matters
An HMO can generate 30–80% more gross income than the same property as a single let, but after higher management fees, HMO-specific compliance costs, and higher maintenance, the net advantage often narrows considerably.
Key points
- HMOs of 5+ occupants or 3+ storeys require a mandatory HMO licence from the local council
- Many councils have selective or additional licensing schemes — check before purchasing
- HMO management fees are typically 10–15% of income — higher than standard
- HMO properties have higher utility costs if bills are included in rent
- Void risk is lower in HMOs (room by room rather than whole-property void)
- Planning permission (sui generis use class change) may be required for larger HMOs
Frequently asked questions
What qualifies as an HMO in the UK?
A House in Multiple Occupation is a property rented by three or more people who are not from the same household (family). Mandatory HMO licensing applies to HMOs with 5 or more people from 2 or more households. Many councils also require licensing for smaller HMOs under selective licensing.
Do HMOs require planning permission?
Small HMOs (up to 6 occupants) are permitted development in most areas as 'C4' use — no planning permission required. Larger HMOs require a change of use to 'sui generis' and planning permission. Some councils have removed permitted development rights through Article 4 directions — check locally.
Is HMO management harder than single lets?
Yes — significantly so. HMOs have multiple tenants (more communication, more disputes, more maintenance), higher regulatory compliance requirements, room-by-room re-letting, and more complex tenancy agreements. Most HMO landlords use specialist HMO management agents.
What are the HMO licensing requirements?
Mandatory HMO licence requirements include: minimum room sizes (6.51m² for adults), adequate bathroom and kitchen facilities, fire safety (interlinked fire alarms, fire doors, emergency lighting), annual gas safety certificate, 5-yearly EICR, and suitable management arrangements.