HMO Licensing in the UK: What You Need and When

Houses in Multiple Occupation (HMOs) are among the most heavily regulated properties in the UK rental market. Get the licensing wrong and you risk an unlimited fine, a rent repayment order covering up to 12 months’ rent, and a ban from renting property.

This guide covers mandatory HMO licensing, additional licensing schemes, and what you need to have in place to pass an inspection.

What Is an HMO?

An HMO is broadly defined as a property occupied by 3 or more people from more than one household who share facilities such as kitchens or bathrooms.

Common HMO types include:

Shared houses (e.g. 4 students sharing, each with their own room)
Bedsits with shared bathroom/kitchen
Converted buildings where flats do not meet building regulations

Two Types of HMO Licence

1. Mandatory HMO Licence

Mandatory licensing applies to any HMO that is:

5 or more storeys (including basements and attics if occupied or used), AND
5 or more tenants from 2 or more households

Wait — that’s not all of England.

The 5-or-more-storey requirement was lowered in 2018. From 1 October 2018, mandatory licensing was extended to cover HMOs with 5 or more occupants from 2 or more households, regardless of the number of storeys, provided they are not purpose-built self-contained flats.

In practice, this means most shared houses with 5 or more people now require a mandatory licence.

2. Additional Licensing Schemes

Local councils have the power to designate additional licensing areas — extending the licensing requirement to HMOs below the mandatory threshold. Some councils require licences for HMOs with 3 or more occupants; others require them for all privately rented properties in certain areas (called selective licensing).

Before purchasing or renting out any HMO, check your local council’s website. Additional licensing designations change — a property that didn’t require a licence last year may require one now.

Applying for an HMO Licence

Applications go through your local council. The process typically involves:

Completing the application form — includes property details, layout, number of rooms, fire safety provisions
Paying the application fee — typically £500–£1,500, varying significantly by council and property size
Passing an inspection — the council inspects the property against the Housing Health and Safety Rating System (HHSRS) and HMO standards
Providing a management plan — outlining how you will manage the property, respond to maintenance issues, and handle tenant concerns

Licences are usually granted for 5 years, after which you must renew.

HMO Standards You Must Meet

To pass inspection and maintain your licence, you must comply with the Management of Houses in Multiple Occupation (England) Regulations 2006 and local conditions. These typically cover:

Room sizes

Minimum room sizes for sleeping accommodation were introduced in 2018:

Single adult: 6.51 m²
Two adults sharing: 10.22 m²
Children under 10: 4.64 m²

Rooms below 4.64 m² cannot be used as sleeping accommodation at all.

Fire safety

Interlinked smoke alarms on every floor
Heat detector in kitchen
Fire doors (FD30 minimum) to all habitable rooms and the kitchen
Emergency lighting (in larger HMOs — check your council’s conditions)
Firefighting equipment (fire blanket in kitchen; extinguisher on communal floors in some councils)

Gas safety

Annual Gas Safety Certificate (GSR12) — legally required for all rented properties, not just HMOs.

Electrical safety

EICR (Electrical Installation Condition Report) required every 5 years for all private rented properties since 2020.

Kitchen and bathroom facilities

Councils set minimum ratios — typically one bathroom for every 4-5 tenants and adequate kitchen cooking and storage facilities. Check your local authority’s HMO standards.

Waste management

Adequate bin facilities and a clear waste management plan.

Fees and Fines

Failure to licence an HMO that requires one:

Unlimited fine on conviction
Civil penalty of up to £30,000 (issued by the council without a court)
Rent Repayment Order — tenants can claim back up to 12 months’ rent if the property was unlicensed

Breaching licence conditions:

Civil penalty up to £30,000

The enforcement regime has tightened in recent years. Councils actively check licensing registers and cross-reference with tenancy data.

Licence Conditions to Watch

Every licence comes with conditions tailored to the property. Common conditions include:

Maximum occupancy limit — you cannot exceed this without applying for a variation
Maintenance response timescales — e.g. emergency repairs within 24 hours, urgent repairs within 7 days
Annual gas safety certificate submission — some councils require a copy
Keeping tenancy agreements on file
Providing tenants with contact details for the responsible person

Read your licence conditions carefully and set reminders for renewals and certificate submissions.

Planning Permission and Article 4 Directions

A separate concern: in many areas, converting a property from a single-family home (C3 use class) to a small HMO (C4 use class) now requires planning permission due to Article 4 directions issued by local councils.

Article 4 directions remove permitted development rights in specific areas. If an Article 4 direction is in force in your area, you cannot convert a family home into a shared house without applying for planning permission — regardless of whether a licence is required.

Check the planning position with your local council before purchasing a property you intend to convert to HMO use.

Tracking Your HMO Compliance

HMO compliance is more complex than standard rentals — more certificates, more conditions, more renewal dates to track. PropLedger’s compliance module tracks HMO licence expiry dates, Gas Safety certificates, EICRs, and fire risk assessments for each property, with alerts before they expire.

For a portfolio with a mix of standard lets and HMOs, having every certificate and licence in one place — with expiry tracking — is the difference between staying compliant and an unexpected inspection finding you short.