HMO Rules & Regulations: A Simple Guide For Landlords
Updated October 2026
Owning a house in multiple occupation (HMO) can be a financially rewarding type of property investment. The laws that regulate HMOs are complex and have become more so in recent years, particularly with the phased rollout of the Renters' Rights Act 2025 and the launch of the Private Rented Sector Database from December 2026. This guide sets out the current framework for landlords, agents, and anyone navigating the HMO regulatory environment.
When is a rental property an HMO?
A rental property is an HMO if it is let to three or more people from more than one household who share some or all of the amenities (toilet, bathroom, or kitchen).
HMOs are divided into small HMOs and large HMOs. A large HMO is a property let to five or more people from more than one household who share amenities. A small HMO is one occupied by fewer people. The distinction is not about the physical size or layout of the property; it is about the licensing regime that applies.
What is HMO licensing for?
HMO licensing exists to maintain and improve the standard of accommodation in shared housing and to make sure those running HMOs are fit to do so. A secondary function is to regulate the amount of shared housing in a given area, which is why councils can introduce their own additional and selective licensing schemes.
When do HMOs need to be licensed?
A large HMO (five or more occupants from more than one household) always requires a mandatory HMO licence from the local council. This is a national requirement.
A small HMO may or may not require a licence. It depends on whether the local authority has introduced an additional licensing scheme in the area. The number of councils operating additional licensing schemes has grown significantly, particularly in London and other major urban areas. If you are considering operating an HMO, checking the local authority's current licensing position should be one of your first steps.
Additional HMO licensing
Housing law gives local authorities the power to introduce additional licensing schemes covering smaller HMOs that would not otherwise require a licence. Additional licensing designations are reviewed on a five-year cycle. Recent sector data suggests 2026 is on course to be the biggest year on record for new additional.
Selective Licensing
Selective licensing applies to all privately rented properties in a designated area, including single lets that would not otherwise require a licence. Councils may designate selective licensing areas where they consider it will help address issues such as anti-social behaviour, poor housing conditions, high crime, high levels of deprivation, high migration, or low housing demand.
In a selective licensing area, HMOs still fall under HMO licensing (whether mandatory or additional) rather than the selective scheme. The two regimes operate alongside each other.
The expansion of selective licensing has not been uniform. Several high-profile schemes have been introduced recently (for example, in Islington and Medway), while others have been postponed, paused, or significantly amended following landlord challenges, including at Croydon, Telford and Wrekin, and Great Yarmouth. If you have properties in an area where a scheme is proposed or recently introduced, engaging with the consultation is more effective than challenging a scheme after designation.
HMOs, planning permission, and Article 4 directions
Planning rules apply to HMOs alongside licensing. A single-household dwelling falls into Use Class C3 under the Town and Country Planning (Use Classes) Order 1987 (as amended). An HMO occupied by 3 to 6 residents falls into Use Class C4. HMOs occupied by more than 6 people are Sui Generis and require specific planning permission.
Converting a C3 house into a C4 HMO (up to 6 occupants) is normally a permitted development right that does not require planning permission. However, where a local authority has made an Article 4 direction for the area, the permitted development right is removed and a planning application is required.
Article 4 directions are becoming more widespread. Research published in 2026 suggests landlords are roughly twice as likely to win an HMO planning appeal outside Article 4 areas than within them. Article 4 can also apply to the conversion of commercial buildings into HMOs. If you are considering buying or converting a property, checking the Article 4 position in the area is essential.
Applying for an Licence
Applying for an HMO licence
HMO licensing is dealt with by the HMO licensing department of the local council. Applications are usually made online. While the law is set nationally, implementation varies considerably from council to council, particularly in relation to amenity standards and application processing times.
In practical terms, applicants will typically need to provide:
Detailed information about the property, including the number of letting rooms, kitchens, bathrooms, and communal areas.
Floor plans with room measurements.
Details of fire safety systems, risk assessments, and other safety precautions.
A current Gas Safety Certificate (CP12) if gas is supplied to the property.
A current Electrical Installation Condition Report (EICR), typically dated within the last 5 years.
Details of ownership and management arrangements.
Confirmation of who will hold the licence and who will manage the HMO.
Payment of the council's licensing fee, which varies by authority and property size.
Both the licence holder and the manager must be 'fit and proper persons'. Councils carry out checks against criminal convictions, housing law breaches, and other matters that may be relevant to this test. A refusal on fit and proper person grounds can be appealed to the First-tier Tribunal.
Under the Management of Houses in Multiple Occupation (England) Regulations 2006, the HMO manager has specific legal responsibilities, including maintaining safety, ensuring services and amenities are in good working order, and keeping the house clean and tidy.
Once the application has been validated, the council may inspect the HMO before granting a licence, or may conduct a compliance inspection at a later date. Licences are typically granted for up to five years and are renewable. Councils can attach specific conditions to a licence where they consider it warranted.
Other things you need to know about when running an HMO
Here are some of the other important things you need to know about when running an HMO and when applying for an HMO licence.
Amenity Standards
HMOs must comply with minimum amenity standards. These cover minimum room sizes, natural light and ventilation, the number of kitchens and bathrooms, and other amenities. National standards set a baseline but local authorities often apply higher standards. The national minimum floor area for a bedroom in an HMO with shared facilities is 6.51 square metres for one person aged over 10 years, 10.22 square metres for two persons aged over 10, and 4.64 square metres for one person aged under 10.
Energy Performance Certificates (EPCs) and MEES
Under the Minimum Energy Efficiency Standards (MEES), privately rented property including HMOs must currently have an EPC rating of E or better. These standards came into force for new tenancies in April 2018 and for existing tenancies in April 2020. The government has consulted on raising the minimum standard to EPC C with a proposed implementation timeline, but the precise timing continues to be a matter of policy development. Landlords operating HMOs should monitor the position closely because any uplift will have significant implications for retrofit costs.
An EPC does not need to be provided to tenants who rent only a room in an HMO.
Gas and Electrical Safety
HMOs require valid safety certificates for gas appliances and electrical installations. Gas appliances must be inspected and certified by a Gas Safe registered engineer every year (CP12). Electrical installations require an Electrical Installation Condition Report (EICR) conducted by a qualified electrician at least every five years.
HMOs must also have working smoke detectors and carbon monoxide detectors, in accordance with current regulations.
Fire Risk Assessments (FRA)
Under the Regulatory Reform (Fire Safety) Order 2005, all HMOs with communal areas require a valid Fire Risk Assessment. The FRA identifies fire safety shortcomings and the remedial action needed. It should be reviewed and updated periodically, particularly after any change to the property or its occupation.
The Housing Health and Safety Rating System (HHSRS)
HMO landlords typically encounter the HHSRS when a council carries out a compliance inspection of the property, or where a tenant has raised a complaint. The HHSRS is a risk-based assessment of potential housing hazards, with each identified hazard scored according to the likelihood of harm occurring and the severity of the harm that could result.
Under the HHSRS reforms that came into effect for inspections from 23 June 2026, the previous list of 29 hazards has been consolidated to 21, by combining overlapping categories into broader headings. The fundamental Category 1 and Category 2 threshold remains unchanged. Scoring now sits within three bands: High (a score of 1,000 or above), Medium (100 to under 1,000), and Low (under 100). Councils are under a mandatory statutory duty to take appropriate enforcement action where a Category 1 hazard is identified, and have a discretionary power to take action in respect of Category 2 hazards.
The 2026 reforms also introduced baseline indicators within each hazard profile. These are a prescriptive but non-exhaustive list of proportionate building measures aimed at achieving safety against each hazard. Importantly, baseline indicators are not mandatory minimum standards and do not replace the assessor's professional judgement, but they provide a clearer framework for what reasonable compliance looks like. The reforms also introduced a new civil penalty of up to £7,000 for Category 1 hazards identified at local authority inspection, under section 6A of the Housing Act 2004.
We cover the current HHSRS framework in more detail in our dedicated guide, HHSRS Reform 2026: What's Changed, and our specialist article on HHSRS Category 1 Hazards: The Expert's Perspective.
Enforcement under the Renters' Rights Act 2025
The Renters' Rights Act 2025 has significantly strengthened the enforcement regime for HMO offences. For HMO landlords, the material changes are:
The civil penalty ceiling under section 249A of the Housing Act 2004 has been uprated from £30,000 to £40,000 per offence. This applies to offences including operating an unlicensed HMO, breaches of HMO licence conditions, and breaches of the HMO Management Regulations 2006.
Rent Repayment Orders are now available for up to 24 months' rent (previously 12 months) under the Renters' Rights Act 2025. Tenants and councils can both apply for RROs where a landlord has operated an unlicensed HMO or committed other specified offences.
A new section 6A civil penalty regime provides for penalties of up to £7,000 for Category 1 hazards identified through HHSRS assessments, in force from June 2026.
Councils have been given expanded investigatory powers and are being resourced to enforce more actively, with government new burdens funding supporting proactive enforcement.
The practical result is that HMO landlords operating without a required licence, in breach of licence conditions, or in breach of the HMO Management Regulations face materially greater financial exposure than they did under the pre-2025 framework.
Penalties for breaching HMO laws
Criminal penalties
Under the Housing Act 2004 and related legislation, landlords who commit certain HMO offences can be prosecuted. On conviction, the court can impose an unlimited fine and the conviction becomes part of the landlord's record.
Civil penalties
Under the Housing and Planning Act 2016, as amended by the Renters' Rights Act 2025, local authorities can impose a civil penalty of up to £40,000 per offence as an alternative to prosecution. Civil penalties are used increasingly often by councils because they can be issued more quickly than a prosecution and the proceeds are retained by the authority for enforcement purposes.
Rent Repayment Orders
Where a landlord has committed certain HMO offences, including operating an unlicensed HMO, tenants or the council can apply to the First-tier Tribunal for a Rent Repayment Order of up to 24 months' rent. A Rent Repayment Order is a civil claim rather than a criminal penalty, which means it can be pursued independently of any prosecution or civil penalty.
Banning orders and the Rogue Landlord Database
The Housing and Planning Act 2016 enables councils to apply for banning orders against landlords or agents convicted of certain offences. Landlords who are banned, or who receive two or more civil penalties within 12 months, can be entered onto the government's Rogue Landlord Database. In practical terms, these outcomes make it very difficult to continue operating as a landlord.
The Private Rented Sector Database
A further significant development is the national Private Rented Sector Database, which begins its phased regional rollout from 15 December 2026 in the West Midlands, with a registration fee of £65 per property. Other regions will follow through 2027.
Registration on the PRS Database will be a legal requirement before letting a property in a designated area. Failure to register attracts a civil penalty of up to £7,000, rising to £40,000 or criminal prosecution for repeat breaches.
The PRS Database does not replace HMO licensing. Landlords operating HMOs in designated areas may need to be licensed under the HMO regime (mandatory or additional) AND registered on the PRS Database. The two regimes will operate in parallel.
How Surrey Property Licensing can help
HMO licensing and enforcement is a complex area, and the landscape has changed considerably with the Renters' Rights Act 2025 and the forthcoming PRS Database. We work with landlords, agents, solicitors, and enforcement teams across London, the South East, and nationally. Our services include:
HMO licence applications under mandatory and additional licensing schemes.
Selective licence applications where properties fall within a designated area.
Representations against proposed licence conditions during the application process.
Temporary Exemption Notice applications under both Part 2 and Part 3 of the Housing Act 2004.
Licence refusal appeals and conditions disputes.
Civil penalty representations and First-tier Tribunal appeals.
HHSRS assessments and reports, including as a check against proposed enforcement.
Fire Risk Assessments carried out by qualified assessors.
Expert witness work in licensing, disrepair, and civil penalty cases.
For an initial discussion of how we might be able to help please call 01483 608975 or use our contact form.
