Fire Safety Requirements for London HMOs: A Complete Guide

Fire safety sits at the centre of every HMO licence application. Councils assess it directly as part of the licence determination, and a property that falls short can face delays, additional conditions attached to the licence, or in some cases outright refusal. Here is what London councils typically look for, and where the requirements interact with wider licensing law.

Why fire safety carries so much weight in licence decisions

Because HMOs house unrelated people who may not know each other's routines, and because escape routes often run through shared circulation space, fire risk is treated as materially higher than in a single-family home. A council assessing a licence application is not just checking boxes against the mandatory conditions regulations — it is forming a judgement about whether the specific layout of that property, given the number of occupants proposed, allows for safe evacuation. This is one of the few areas where the physical inspection genuinely shapes the outcome of the paperwork.

Smoke alarms and detection systems

Mains-interlinked smoke alarms are required in circulation areas — hallways and landings — on every floor, so that an alarm triggered on one level is heard throughout the property rather than only in the room where the fire starts. Under the mandatory conditions attached to a licence, smoke alarms must be fitted on every storey used as living accommodation, and all alarms must be tested regularly and kept in working order, a duty that continues for as long as the licence is in force rather than ending once the application is approved.

A common failing at renewal, rather than at first application, is a smoke alarm that has been disconnected or has a flat battery, often only discovered through resident behaviour rather than any change to the property itself. This is one of the areas the Management of Houses in Multiple Occupation (England) Regulations 2006 specifically require a landlord to keep in working order, independent of the licence renewal cycle.

Heat alarms and carbon monoxide detectors

Kitchens require heat alarms rather than smoke alarms, since normal cooking activity would otherwise trigger frequent false alarms from smoke-sensitive detectors. Carbon monoxide alarms are a separate mandatory requirement in any room containing a solid fuel appliance, such as a wood burner or open fire, reflecting the distinct risk those appliances carry regardless of the property's smoke detection coverage.

Fire doors and containing a fire's spread

Properties of three or more storeys typically require fire-resisting doors to all habitable rooms, along with kitchen doors fitted with self-closing mechanisms, so that a fire starting in one room is contained long enough for occupants elsewhere in the building to escape. The precise specification depends on the individual council and the property's layout, since a converted Victorian house with an unusual staircase arrangement may need a different solution to fire containment than a purpose-built modern HMO, and councils will often specify exactly what they expect as a condition of the licence.

A frequent issue in older shared houses is a fire door fitted correctly but with its self-closing mechanism removed or disabled by an occupant, often because it is heavy or catches on carpet. From a licensing perspective this is treated the same as never having fitted the door at all, since the mechanism is what makes the door functionally fire-resisting.

Escape routes and window sizes

Every bedroom must have a safe means of escape in the event of fire, which in most properties means either a protected route to the final exit or a window that can serve as an alternative escape route. Where a window is relied on as a means of escape, it must be of adequate size and unobstructed, which rules out fitting fixed bars, oversized furniture blocking access, or windows that do not open sufficiently. In some layouts, particularly upper floors of older conversions, an external fire escape may be required where internal escape routes are judged inadequate.

Landlords converting a loft or extending a property to add an extra letting room should treat the escape route question as a planning-stage consideration rather than an afterthought. A room that cannot meet the escape route requirement may not be lettable as a bedroom at all, regardless of how the rest of the licence application looks.

Emergency lighting in larger or more complex HMOs

Larger HMOs, or those with layouts that are not straightforward to navigate in the dark — long corridors, split levels, or unusual staircases — may need emergency lighting in circulation areas, so that occupants can still find their way to an exit if the normal electrical supply fails during an incident. This is assessed on a case-by-case basis against the specific property rather than applied as a blanket rule.

Portable fire-fighting equipment

Many councils require fire blankets in kitchens as standard, and fire extinguishers in circulation areas for larger HMOs, on the basis that a fire caught in its first moments with the right equipment to hand is far less likely to become a full evacuation. What is required here varies more by council than some of the other categories, so it is worth checking local expectations rather than assuming a standard from a different borough will apply.

Annual certification and ongoing duties

A fire alarm system certificate should be obtained annually from a qualified engineer, and will be required as part of a licence application rather than something to arrange only once the licence is granted. This sits alongside the other mandatory conditions — an annual gas safety certificate and electrical installations inspected at intervals not exceeding five years — and alongside the Management of Houses in Multiple Occupation (England) Regulations 2006, which separately require fire detection equipment to be kept in working order for as long as the property operates as an HMO, regardless of when the licence was last renewed. Our sister site, electrician247.london, provides NICEIC-certified fire alarm testing and EICR electrical certification for London landlords, covering both of these certification requirements.

What happens if fire safety falls short

A council that identifies inadequate fire safety provision during a licence application can refuse the licence outright, or grant it subject to conditions requiring specific remedial work within a set timeframe. Refusal can be appealed to the First-tier Tribunal (Property Chamber), normally within 28 days of the decision notice, and the Tribunal will review the case afresh rather than simply checking whether the council followed the correct process. An appeal only makes sense if the underlying fire safety provision can genuinely be brought up to standard, since the Tribunal can substitute its own decision either way.

Our compliance review

As part of our mandatory HMO licence service, we review a property's fire safety provision against the current mandatory conditions before submission, and advise on any remedial work needed so the application has the best chance of a smooth approval rather than a refusal or a lengthy conditions process.

Fire safety shortfalls are one of the most common reasons an HMO licence application stalls. Contact us before you apply — our review is included as part of the £500+VAT mandatory HMO licence service and the £300+VAT additional licence service.