HMO Compliance in London: Complete Requirements Guide
Running an HMO in London involves layers of compliance obligations that go well beyond those for standard single lets. This guide covers the key requirements — from mandatory licensing to fire safety, gas safety and electrical certificates.
Houses in Multiple Occupation (HMOs) are among the most heavily regulated properties in the private rented sector. London landlords operating HMOs must navigate mandatory licensing, additional borough-level licensing, and a range of safety and maintenance standards that apply beyond what is required for standard single lets. Getting it wrong is expensive — penalties for unlicensed HMOs can reach £30,000, and local authorities have the power to impose Rent Repayment Orders requiring landlords to refund up to 12 months of rent.
HMO licensing in London
A mandatory HMO licence is required for any property occupied by 5 or more people from 2 or more separate households who share facilities. Licences are issued by the local borough and are typically valid for up to 5 years. Beyond mandatory licensing, most London boroughs operate Additional Licensing schemes covering smaller HMOs — properties with 3 or more occupants. Always check the licensing requirements for the specific borough where your HMO is located.
Gas safety for HMOs
The same annual gas safety certificate requirement that applies to standard lets applies to HMOs — an inspection by a Gas Safe registered engineer every 12 months, with certificates provided to all occupants and retained for 2 years. The key difference in HMOs is that with multiple gas appliances across shared and private spaces, the inspection scope is typically wider. All communal gas appliances must be included.
EICR for HMOs
HMOs are subject to the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020, requiring an EICR at least every 5 years. However, some London borough HMO licensing conditions specify shorter inspection intervals — commonly 3 years. The licence conditions will state the required inspection frequency. A C1 or C2 finding requires remedial work within 28 days (or immediately for C1).
Fire safety requirements
HMOs are subject to stricter fire safety requirements than standard lets. Depending on the size and type of HMO, requirements typically include:
- Mains-wired interlinked smoke alarms on every floor
- Heat detectors in kitchens
- Emergency lighting in communal areas (for larger HMOs)
- Fire doors with self-closers to communal areas and individual rooms
- Extinguisher provision in communal kitchens
The specific requirements depend on the number of storeys, occupant count and licence conditions. A fire risk assessment is required for most HMOs with communal areas.
Legionella risk assessment
The HSE requires landlords of all rented properties — including HMOs — to carry out a Legionella risk assessment under HSE guidance L8. In HMOs, where multiple occupants share hot and cold water systems, the risk assessment is more complex. Cold water storage tanks, dead legs in pipework and low-use outlets all require attention.
Maintenance and repair obligations
HMO licences typically include conditions around the state of repair and maintenance of the property, including minimum room sizes, adequate heating, ventilation in bathrooms and kitchens, and functional sanitary facilities for each room-to-occupant ratio. Local authorities inspect licensed HMOs and can issue improvement notices requiring work to be completed within set timeframes.
Frequently asked questions
Does an HMO need a licence in London?
Any HMO with 5 or more occupants from 2 or more households requires a mandatory licence. Most London boroughs also require licensing for smaller HMOs under Additional Licensing schemes — check with your specific borough.
How often does an HMO need an EICR?
At least every 5 years under the 2020 Regulations, but many London borough HMO licences require more frequent checks — typically every 3 years. Check the conditions on your HMO licence.
What fire safety is required in an HMO?
Requirements depend on the size and type of HMO, but typically include mains-wired interlinked smoke alarms, heat detectors in kitchens, and fire doors to communal areas. Larger HMOs may require emergency lighting and a fire risk assessment.
What is the penalty for an unlicensed HMO?
Local authorities can issue a financial penalty of up to £30,000 for operating an unlicensed HMO. They can also apply for a Rent Repayment Order, requiring landlords to repay up to 12 months of rent.