HMO licensing is one of the most misunderstood areas of landlord compliance. Many landlords with large shared houses do not realise their property falls within the mandatory licensing threshold. Others operating smaller shared houses in areas with additional or selective licensing schemes need a licence but are unaware their local authority operates one.
The key question is whether your property meets the definition of an HMO and whether it crosses the licensing threshold. Getting this wrong is expensive: the civil penalty for operating without a licence is up to £30,000, and an unlicensed HMO landlord cannot serve a Section 21 notice (now abolished) and is vulnerable to a rent repayment order application from tenants.
What is an HMO?
A House in Multiple Occupation (HMO) is a property occupied by 3 or more people who form 2 or more separate households, where at least one basic amenity (toilet, bathroom, or cooking facilities) is shared. Common examples:
- A student house occupied by 4 students who are not all related — 4 people, 4 households
- A house shared by 3 or more working professionals with shared kitchen and bathroom
- A converted flat or bedsit building with shared facilities
- A property with a resident landlord and 2+ tenants sharing facilities does not qualify as an HMO for licensing purposes — the resident landlord exemption applies
Mandatory HMO licensing threshold
Mandatory HMO licensing under the Housing Act 2004 (as amended by the Licensing of Houses in Multiple Occupation (Mandatory Conditions of Licences) (England) Regulations 2018) applies to any HMO that:
- Has 5 or more occupants, AND
- Those occupants form 2 or more separate households, AND
- At least one amenity (kitchen, bathroom, toilet) is shared
- This covers all storeys of the building — the old 3-storey rule was removed in October 2018
- There is no minimum number of storeys — a single-storey bungalow shared by 5 unrelated people needs a mandatory licence
Additional and selective HMO licensing
Even if your property does not meet the mandatory threshold, your local authority may operate an additional licensing scheme that covers smaller HMOs (e.g. 3+ or 4+ occupants). Many councils also operate selective licensing for ALL privately rented properties in designated areas. Check your council's licensing portal:
- Additional HMO licensing: covers HMOs below the mandatory threshold in designated areas
- Selective licensing: covers all private rented properties in a designated area — not just HMOs
- Both additional and selective licences carry civil penalties of up to £30,000 for non-compliance
- Councils are not required to advertise additional/selective schemes — it is the landlord's responsibility to check
HMO licence conditions
A mandatory HMO licence comes with conditions set by the local authority, but minimum national standards are prescribed. Key conditions include:
- Minimum room sizes: Sleeping rooms for adults must be at least 6.51 m² (single) or 10.22 m² (double). Rooms below 4.64 m² cannot be used for sleeping
- Refuse management: Adequate provision for the storage and disposal of refuse — in practice, sufficient bins for the number of occupants
- Gas safety: Annual gas safety check (CP12) — copy must be provided to the local authority on renewal
- Electrical safety: Fixed wiring inspection (EICR) every 5 years
- Smoke and CO alarms: Working smoke alarm on every floor, CO alarm in every room with a solid fuel appliance
- Fit and proper person: The licence holder and manager must be a fit and proper person — convictions for fraud, violence, or drug offences may disqualify
How to apply for an HMO licence
Applications are made to the local housing authority (your council). The process varies by authority but the standard steps are:
- Check whether your property requires a licence using your council's postcode checker or licensing portal
- Complete the application form — usually online via the council's licensing portal
- Pay the application fee — typically £500–£1,500 depending on the authority and number of occupants
- Submit required documents: gas safety certificate, EICR, floor plan with room sizes, management arrangements
- The council may inspect the property before granting the licence
- Licences are typically granted for 5 years and must be renewed before expiry
Penalties for operating without an HMO licence
Operating an unlicensed HMO or breaching licence conditions carries serious consequences:
- Civil penalty: Up to £30,000 per offence — local authorities can issue civil penalties without prosecution
- Rent repayment order (RRO): Tenants (and local authorities) can apply to the First-tier Tribunal for an RRO requiring the landlord to repay up to 12 months' rent
- Banning order: Repeat offenders can be banned from letting properties
- Rent freeze: An unlicensed HMO landlord cannot increase rent above the rent at the date of the offence
- No section 21: Section 21 (now abolished under the RRA 2025) could not be served — the new possession grounds also require compliance with licensing
Frequently asked questions
Does a 4-bedroom student house need an HMO licence?+
It depends on occupancy. Mandatory HMO licensing applies to properties with 5 or more occupants from 2 or more households. A 4-bedroom house shared by 4 students does not require a mandatory licence — but if your local authority operates an additional licensing scheme covering 4+ person HMOs, a licence is still required. Check your council's licensing portal using the property postcode.
How long does an HMO licence last?+
HMO licences are granted for up to 5 years. Local authorities may grant shorter licences (e.g. 1–2 years) where there are concerns about management standards or property condition. You must apply to renew before the licence expires — operating with an expired licence is treated the same as operating without a licence.
What is the minimum room size for an HMO bedroom?+
Under the mandatory HMO licensing conditions, a room used as sleeping accommodation for a single adult must be at least 6.51 m² (70 sq ft). A room used by two adults must be at least 10.22 m² (110 sq ft). Rooms below 4.64 m² cannot be used for sleeping at all. Rooms between 4.64 m² and 6.51 m² can only be used by children under 10.
Can I manage an HMO through a letting agent?+
Yes. The licence can be held by the landlord or by a manager (including a letting agent). If the property is managed by a letting agent, the agent can be named as the licence holder and manager. Both the landlord and manager must be fit and proper persons. The licence holder remains responsible for ensuring licence conditions are met.
What happens if my HMO licence application is refused?+
If the council proposes to refuse your licence application, they must serve a 'minded to refuse' notice giving you the opportunity to make representations. If the licence is ultimately refused, you can appeal to the First-tier Tribunal (Property Chamber) within 28 days. While the appeal is pending, an interim management order may be made — effectively the council taking over management of the property.