HMOs — What counts as a House in Multiple Occupation

If your England rental property is occupied by three or more people from two or more different households who share facilities, it is likely a House in Multiple Occupation (HMO). HMOs are subject to additional licensing, management rules, and safety standards. Getting the definition right is essential — the consequences of operating an unlicensed HMO are severe. Reviewed March 2026.

What the rule is

The Housing Act 2004 defines a House in Multiple Occupation (HMO) as a property occupied by three or more people forming two or more households, where some or all share basic amenities such as a kitchen or bathroom. The definition covers a wide range of property types — traditional shared houses, bedsits, converted flats, and purpose-built student accommodation can all qualify.

When it applies

A property is an HMO if all three conditions are met:

1. It is occupied by 3 or more people
2. Those people form 2 or more separate households (a household is a single person, or a couple/family living together)
3. They share basic amenities (kitchen, bathroom, or toilet)

Mandatory licensing applies where:

• 5 or more people from 2 or more households occupy the property

Additional licensing (if designated by the local authority) may apply to smaller HMOs — check with your local council.

What landlords must do

• Determine whether your property meets the HMO definition
• Check whether mandatory or additional licensing applies using your local authority’s website
• If licensing is required, apply before letting or continue operating without a licence (see consequences below)
• Meet all HMO management and safety requirements (fire doors, alarms, room sizes, facilities)
• Keep records of the number of occupiers and their household relationships

What evidence to keep

• Documentation of who occupies the property and their household relationships
• HMO licence (once obtained) and conditions
• Records of compliance with licence conditions (fire safety checks, room sizes)
• Any correspondence with the local authority about licensing

Common mistakes

• Assuming all occupants must share a kitchen — sharing a bathroom or toilet alone can make a property an HMO
• Not counting adult children — adult children living with their parents count as the same household, but unrelated individuals do not
• Ignoring additional licensing — even if your HMO doesn’t meet the mandatory threshold (5+ people), your local authority may have designated an additional licensing scheme that catches smaller HMOs
• Operating without a licence — this is a criminal offence with unlimited fines; the local authority can also make a Rent Repayment Order requiring you to return up to 12 months’ rent

FAQ

Is a property with 4 unrelated sharers an HMO? Yes — 4 unrelated people from 4 different households sharing a kitchen and bathroom is an HMO, but may not require a mandatory licence (which applies at 5+). Check whether your local authority has an additional licensing scheme.

What if I share the property myself? A resident landlord living in the property with fewer than 2 tenants is excluded from most HMO rules. However, if a resident landlord lives with 2 or more unrelated tenants, the exclusion may not apply. Check the precise definition in the Housing Act 2004.

Do student properties count? Yes — purpose-built student accommodation may be exempt from some licensing requirements, but shared student houses typically meet the HMO definition. Check with your local authority.

What is a “household” for HMO purposes? A household is either a single person, or a couple (married, civil partners, or cohabiting), or a family unit (parents and children). Unrelated friends or colleagues are each a separate household.