Living in an HMO: what the rules give you

A shared house occupied by five or more people from two or more unrelated households is legally defined as a House in Multiple Occupation, or HMO. Your landlord must obtain a licence from the local council, and that licence comes with strict rules on fire safety, space, and building standards designed to protect your health and safety.

When does an HMO licence become mandatory?

The national mandatory licensing rule is straightforward: if five or more people live in your house and they belong to two or more separate households, your landlord must hold a licence. A household is defined as a single person or family members living together. So three unrelated friends count as three households; a couple sharing with one other person counts as two households.

If your housemates are all related to each other—a family renting together—they form one household regardless of how many of them there are. Children of any age count towards the total occupancy number.

Your council may also operate additional licensing schemes that cover smaller HMOs, typically those with three or four occupants from separate households. Some councils have selective licensing, which applies to all rented properties in a designated area regardless of how many people live there. Rules vary by location, so always check with your local authority.

Understanding HMO licence validity and renewal

An HMO licence is valid for a maximum of five years. Your landlord must renew before it expires, and they must apply for a separate licence for each property they operate. The council will conduct a Housing Health and Safety Rating System assessment to ensure the property meets minimum standards, including fire safety, structural integrity, and adequate facilities.

Fire safety requirements in licensed HMOs

Fire safety is the most critical licensing requirement. Licensed HMOs must have interconnected fire alarm systems installed throughout the building—simple battery-powered standalone alarms do not meet legal standards. These systems are classified by grade and category, and the exact specification depends on the property's size, layout, and how many people occupy it.

Fire alarm grades and categories

For a typical two-storey shared house with three to five tenants sharing amenities, the council usually requires a Grade D system with LD2 (Intermediate Protection) coverage. This means mains-powered interconnected smoke alarms on every storey and in hallways, landings, and living areas, plus a heat alarm in the kitchen. All alarms must be wired together so that when one activates, every alarm in the building sounds.

Larger or more complex HMOs—such as those with individual locked bedrooms and separate tenancy agreements per room (called bedsits)—typically require a Grade A system with full control panels and professional installation. Budget roughly £350 to £600 for a Grade D system in a typical five-bedroom HMO, or £1,000 to £3,000 for a Grade A installation.

Your landlord or letting agent should have obtained a professional fire risk assessment before applying for a licence, and they must confirm the exact grade and category with the council's licensing team.

Fire doors and emergency escape routes

Fire doors must be fitted to separate living spaces and communal areas. These are doors with special fire-resistant properties that slow the spread of flames and smoke. Emergency escape routes must be kept clear at all times, so never block stairwells, hallways, or external doors with furniture or stored items. Your landlord has a legal duty to maintain and test these systems regularly.

Minimum space and amenity standards

Licensed HMOs must meet minimum sleeping room sizes. A bedroom in an HMO must be at least 6.51 square metres for one adult. Shared facilities—kitchen, bathroom, and toilet—must be adequate for the number of occupants. The council will set out specific standards in your area's licensing guidance, which typically includes requirements for natural light and ventilation, water supply, heating, and general state of repair.

How to check if your HMO is properly licensed

You have the right to know whether your shared house is properly licensed. Most councils maintain a public HMO register online, which you can search by address or postcode. Start by finding your local council's website and looking for their housing licensing or private rented sector page—many councils publish searchable registers with the property address and licence status.

If you cannot find your council's online register, contact their housing or environmental health team directly. You can also ask your landlord or letting agent for a copy of the licence. Seeing the licence document gives you proof that the property is legally occupied and meets safety standards.

What to do if your HMO is unlicensed

If you discover your landlord is operating an unlicensed HMO when one is legally required, you have options. You can report the landlord to your local council's private housing or HMO licensing team. The council will investigate and can issue fines up to £40,000 or pursue prosecution with unlimited fines. Your report can be made anonymously.

You should also gather evidence: keep copies of your tenancy agreement, rent payment records, bank statements showing transfers, any correspondence about repairs or conditions, and notes on the dates you lived there. This documentation will be essential if you choose to pursue further action.

Applying for a Rent Repayment Order

If you have been paying rent for an unlicensed HMO that should have been licensed, you can apply to the First-tier Tribunal (Property Chamber) for a Rent Repayment Order. This legal mechanism allows you to claim back up to 12 months of rent that you personally paid during the period the property was unlicensed. You do not need a lawyer, you do not need to move out first, and the landlord does not need to have been convicted of a crime.

To apply, you will need to complete the RRO1 form and submit it to your regional First-tier Tribunal office. The form is available through the tribunal service. You must prove that the property was an HMO requiring a licence, that no licence was in force during the period you're claiming for, and the rent you paid during that time. The tribunal applies a high standard of proof—it must be satisfied beyond reasonable doubt that the breach occurred.

The maximum award is 12 months' rent, but the tribunal considers factors such as the seriousness of the offence, the landlord's conduct, and the condition of the property when deciding the actual amount. Tribunals do not automatically award the full 12 months.

Your rights and responsibilities as a tenant

Living in a licensed HMO gives you certain guarantees. Your landlord must maintain fire safety equipment and keep it tested. They must ensure the building is in a state of good repair, with working heating, water supply, and sanitation. The council's licensing conditions often require landlords to provide a written house rules document, set out management procedures for noise and disputes, and maintain adequate communal facilities.

In return, tenants are expected to follow the tenancy agreement, keep shared spaces clean and uncluttered, respect neighbours, and report any maintenance issues promptly. Do not block fire escape routes or tamper with alarms. If you have concerns about the property's condition or safety, report them to your landlord in writing. If they do not respond within a reasonable timeframe, you can escalate to the council.

Key points to remember

• Five or more people from two or more households sharing a house requires an HMO licence under national law.
• Your council may require licences for smaller shared houses through additional licensing schemes—always check locally.
• A licensed HMO must have interconnected fire alarms, fire doors, adequate room sizes, and meet health and safety standards.
• You can check whether your property is licensed by searching your council's public HMO register online.
• If your landlord is operating an unlicensed HMO, report them to the council; you may also claim a Rent Repayment Order for up to 12 months' rent.
• Your landlord cannot legally evict or threaten you for reporting housing breaches.
• Keep your tenancy documents, rent receipts, and records of any complaints—these are vital evidence if you need to pursue a claim later.