Guide · 6 min read
Fire alarms for landlords: what a rented property needs
Standard lets and HMOs are held to very different standards. Here is the difference, in plain terms.
Last updated 14 August 2026
The baseline for any rented property
For a standard let in England, the baseline is a smoke alarm on every storey used as living accommodation, and a carbon monoxide alarm in any room with a fixed combustion appliance other than a gas cooker. Alarms must be working at the start of a tenancy.
That baseline is a baseline. It is the legal minimum for the simplest kind of let, and a great many properties are not the simplest kind of let.
Where HMOs differ
A house in multiple occupation is held to a considerably higher standard, because more people who do not know each other are sleeping in one building with shared escape routes.
In practice that usually means a linked system rather than standalone battery alarms, so a detector triggering in a ground-floor kitchen wakes someone on the second floor. Depending on size, storeys and layout it can mean a full grade of system with a control panel, detection in circulation areas and escape routes, and emergency lighting.
The specification is driven by the building, not by a single rule you can look up. Storeys, number of occupants, whether the property is licensed and how the escape route is arranged all change the answer.
- Interlinked detection so an alarm anywhere is heard everywhere
- Detection covering the escape route, not just bedrooms
- Heat rather than smoke detection in kitchens
- Emergency lighting where the escape route needs it
- A control panel and documented testing for larger properties
Who is responsible for testing
The landlord is responsible for the system being present and working. Where a property has a panel-based system, periodic professional servicing is expected on top of routine checks, and the record of it matters: a logbook you cannot produce is very close to servicing you did not do.
For licensed HMOs, the licensing authority can and does ask to see it.
The commonest mistakes we see
Two recur constantly. The first is a smoke detector fitted in a kitchen, which false-triggers until a tenant takes the battery out. At which point the property has no detection at all and everyone believes it does.
The second is standalone battery alarms in a property that needed a linked system. It looks compliant from inside any single room, and is not.
Frequently asked
- Does my rental need interlinked alarms?
- For an HMO, almost certainly. For a simple single-household let in England the baseline is a working smoke alarm on each storey, though interlinking is better practice. The property itself decides. We will look at it and tell you.
- What counts as an HMO?
- Broadly, a property rented to three or more people forming more than one household who share a kitchen or bathroom. Larger HMOs need a licence. Your local authority sets the detail and can confirm whether yours qualifies.
- How often does a rented property system need testing?
- Alarms must be working at the start of each tenancy. Panel-based systems in HMOs need periodic professional servicing on top, with the logbook kept up to date.
- Can you take over an existing rental system?
- Yes. We inspect what is there, tell you honestly whether it suits the property as it is now let, and take on the servicing.
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