Houses in Multiple Occupation (HMOs) are consistently identified as the highest-risk residential property type for fire deaths and serious injuries. The combination of multiple independent occupants (who may not know each other), shared cooking facilities, multiple sleeping rooms, complex building layouts and frequently older or converted housing stock creates a fire risk profile significantly more hazardous than that of a standard domestic dwelling.
The regulatory response has reflected this elevated risk. HMOs are subject to more stringent fire safety requirements than other rented properties, fire and rescue services have sharply increased their audit activity of purpose-built flats and HMO premises, and fire safety prosecutions of HMO landlords are among the most numerous and severe in the enforcement caseload. This guide brings together the latest verified data from MHCLG and Gov.UK fire statistics, alongside published prosecution cases, to explain what the numbers mean for landlords, managing agents and tenants.
Key facts and figures
- +60% rise in fire safety audits of purpose-built flats of 1–3 storeys in 2024/25.
- +61% increase in audits of 4–5 storey flats, with 6–9 storey blocks up around 45%.
- 8.8 hours is the average audit duration for buildings of 10 storeys and above.
- 31% of dwelling fire fatalities in 2024/25 occurred where no smoke alarm was present.
- £18k–£60k+ is the typical range of recent fines imposed on HMO landlords, plus costs.
- £40,000 is now the maximum civil penalty for breaches of electrical safety standards in rented homes.
HMO fire risk: the highest-risk residential category
HMOs concentrate the factors that drive fire deaths into a single building. Where an ordinary household shares smoke alarms, cooking habits and an escape plan, an HMO houses several unconnected households who often do not know one another, may keep different hours and have no shared understanding of how to evacuate. That combination is why fire and rescue services and housing authorities treat HMOs as a priority for inspection and enforcement.
Audit activity has climbed steeply. Fire safety audits of purpose-built flats of 1–3 storeys rose by around 60% in 2024/25, audits of 4–5 storey blocks by about 61%, and 6–9 storey blocks by roughly 45%. Taller buildings absorb the most inspector time, with the average audit of a building of 10 storeys or more lasting around 8.8 hours.
Why HMOs face elevated fire risk
Several features of HMOs combine to raise the likelihood and severity of fire:
- Multiple unconnected occupants. Independent households complicate evacuation — there is rarely a shared plan or a single person responsible for raising the alarm.
- Shared cooking facilities. Cooking remains the leading cause of accidental dwelling fires, and shared kitchens see heavier, less supervised use.
- Complex converted layouts. Many HMOs are former family homes subdivided into bedsits, producing long corridors, inner rooms and inconsistent fire separation.
- High occupancy density. More people relative to the number and width of escape routes increases the risk of routes becoming overwhelmed.
- Older building stock. Variable construction and poor compartmentation allow fire and smoke to spread between rooms and floors.
- Lithium-ion battery hazards. E-bikes, e-scooters and their chargers introduce a fast-developing ignition risk, often charged in bedrooms or hallways.
Smoke alarms remain the single most important protective factor. In 2024/25, no smoke alarm was present in around 31% of dwelling fire fatalities — a stark reminder of how decisive working detection is to survival.
Fire safety requirements for HMOs
HMOs sit at the intersection of housing and fire safety law, and landlords must satisfy several overlapping regimes:
- Housing Act 2004. Larger HMOs require a licence, and licence conditions set standards for fire detection, escape routes and amenities. Local authorities assess hazards, including fire, under the Housing Health and Safety Rating System.
- Regulatory Reform (Fire Safety) Order 2005. The common parts of an HMO — hallways, stairwells and shared kitchens — are regulated premises requiring a fire risk assessment by a competent person.
- Electrical Safety Standards (Private Rented Sector) Regulations 2020. Landlords must have the electrical installation inspected and tested at least every five years; the maximum civil penalty for breaches is £40,000.
- Smoke and Carbon Monoxide Alarm Regulations. Smoke alarms must be fitted on every storey used as living accommodation, with carbon monoxide alarms in rooms containing a fixed combustion appliance.
Prosecution cases: HMO landlords
Published enforcement cases show why these duties are taken seriously. Penalties for HMO fire safety failings are among the largest in the housing enforcement caseload, and courts have shown willingness to impose custodial sentences alongside fines.
| Case (location) | Penalty | Principal failing |
|---|---|---|
| Camden landlord | ~£49,000 | Defective fire doors |
| Slough landlord | £40,000+ | No fire risk assessment; disabled alarms |
| Manchester landlord | £18,000+ | No fire alarm; locked exit |
| Suffolk company | £60,000 fine + ~£24,750 costs | Serious failings; suspended prison sentence for director |
The common thread across these cases is straightforward: missing or invalid fire risk assessments, failed fire doors, disabled or absent detection, and obstructed escape routes. Each is preventable, and each is exactly what an inspection or a competent assessment is designed to catch.
What HMO landlords must do
Compliance is not complicated, but it must be evidenced. As a minimum, a responsible HMO landlord should ensure:
- A written fire risk assessment carried out by a competent person and kept under review.
- An appropriate fire detection and alarm system — typically Grade D LD2 or LD1, or a mains-powered interlinked system suited to the building.
- Fire-resisting doors fitted with working self-closing mechanisms and intact seals.
- Escape routes that are clear, adequately lit and kept free of obstruction and combustible storage.
- Suitable firefighting equipment, such as extinguishers and fire blankets, where the assessment requires it.
- Emergency lighting in common parts where escape routes would otherwise be unsafe in darkness.
Where staff or managing agents are responsible for a portfolio, basic fire warden training helps the people on the ground recognise hazards, maintain escape routes and respond correctly if the alarm sounds.
Sources & references
- Ministry of Housing, Communities & Local Government (MHCLG) — Fire and rescue incident and safety activity statistics, England
- Gov.UK — Fire statistics data tables and private rented sector guidance
- Suffolk County Council — fire safety prosecution case reporting
- Croner-i — fire safety enforcement and prosecution coverage
- The Landlord Association — HMO fire safety guidance for landlords
- MHCLG – Fire Prevention and Protection Statistics
- MHCLG – Detailed Analysis of Fires
- Suffolk County Council – Fire Safety Prosecutions
- Croner-i – Recent Prosecutions Under the Fire Safety Regulations
- The Landlord Association – EICR Explained
Make sure the people managing your HMOs know their fire safety duties.
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Mark writes about workplace fire safety, compliance and accredited training for Fire Marshal Training, part of Online CPD Academy.