Guide — HMO Fire Safety
Escape Routes for HMOs
Houses in multiple occupation are the highest-risk domestic fire environment — shared kitchens, multiple unrelated occupants, and varied sleep patterns all increase ignition and detection risk. The escape route requirements are correspondingly stricter than for single-family homes.
Highest-priority action
Every bedroom door in an HMO must be an FD30S fire door with a functioning self-closer. A closed fire door gives occupants time to escape while fire and smoke spread through the communal areas. A wedged-open or missing fire door can be fatal for all occupants.
HMO fire safety requirements overview
| Element | Requirement |
|---|---|
| Fire alarm grade | Grade D (LD2) minimum for smaller HMOs; Grade A (LD1) for larger or higher-risk properties — interlinked mains-powered with battery backup |
| Fire doors | FD30S (30-minute fire resistance with smoke seals) required on all bedroom doors and kitchen door; self-closing device fitted to each |
| Escape routes | Corridors and stairways kept clear at all times; no storage on escape routes; emergency lighting required in larger HMOs |
| Fire risk assessment | Mandatory under RRO 2005 for HMOs with common areas; must be reviewed after each change of layout, occupancy, or use |
| Fire notices | Fire action notices posted at each fire call point and on each floor stating evacuation procedure and assembly point |
| Final exits | All final exit doors must open without a key from the inside; thumb-turn or lever handle required — no deadbolts from inside |
| Licensing conditions | Mandatory HMO licence conditions (5+ occupants, 3+ storeys) include specific fire safety requirements set by the licensing authority |
Why HMOs carry higher fire risk
The shared kitchen is the primary ignition source — it is used by multiple occupants across extended hours, with varying levels of cooking competence and attention. The escape route (the shared corridor and staircase) connects all sleeping areas to the highest-risk room. If the kitchen door is not a fire door, or if the corridor is obstructed, every occupant's escape path is compromised simultaneously.
Additionally, HMO occupants may not know each other well and cannot necessarily rely on a neighbour alerting them. Interconnected alarms are therefore critical — a trigger in the kitchen must wake everyone in every bedroom immediately.
Escape route design principles
The protected escape route in an HMO — the corridor and staircase — must be maintained as a smoke-free zone for long enough for all occupants to evacuate. This requires: fire-resisting construction on the walls and ceiling; FD30S fire doors on all rooms opening onto the route; and no combustible materials stored in the corridor. For the underlying design principles, see our means of escape glossary entry and our fire compartmentation guide.
Tenant obligations
HMO tenants have a legal obligation not to obstruct escape routes and to comply with the fire safety information provided by the landlord. Tenants should familiarise themselves with the escape route, the location of the alarm call points, and the assembly point on moving in. For tenant rights and landlord duty breakdown, see our fire safety for renters guide. If you live in a flat rather than an HMO, see our fire safety for flats guide.
Getting a fire risk assessment for your HMO
The HMO fire risk assessment must be carried out by a competent person — typically a qualified fire risk assessor. For larger HMOs (seven or more occupants, or three or more storeys), a formal written assessment is mandatory and must be available for inspection by the local fire authority. Our fire risk assessment guide covers the five-step process and common findings.
Frequently asked questions
FAQ