Smoke alarm regulations
Smoke alarm regulations set the minimum legal requirements for fire detection in rented homes in England. Under The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, as amended by The Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 (in force from 1 October 2022), landlords must install at least one smoke alarm on every storey used as living accommodation, and must ensure every alarm is in working order on the day a new tenancy starts. Failure to comply with a remedial notice from the local authority carries a civil penalty of up to £5,000.
What changed in October 2022
The 2015 Regulations applied only to private landlords. From 1 October 2022, the Amendment Regulations extended the same duties to social landlords for the first time. They also expanded the carbon monoxide alarm requirement: before that date, CO alarms were only required in rooms with solid-fuel appliances. From October 2022, a CO alarm is required in any room used as living accommodation that contains a fixed combustion appliance, meaning gas boilers and oil-fired boilers are now included, not just wood-burning stoves and open fires. Gas cookers remain explicitly excluded. The detail on the CO alarm requirement is covered in the separate carbon monoxide alarm regulations entry.
What landlords must do
The core obligations, as set out in the gov.uk guidance booklet for landlords, are:
At least one smoke alarm must be installed on every storey where there is a room used as living accommodation. The alarm should be fitted to the ceiling in a circulation space, for example a hallway or landing, on each floor. The regulations do not specify the alarm type (mains-powered or battery), but the government guidance recommends compliance with British Standard BS 5839-6 and suggests sealed-for-life battery units where mains wiring is not used.
The landlord must test every alarm on the day a new tenancy begins and confirm it is in working order. This is a condition of each new tenancy start, it does not apply to renewals or to periodic tenancies arising automatically when a fixed term ends.
If a tenant reports that an alarm is not working, the landlord must arrange repair or replacement as soon as reasonably practicable. This duty was made explicit by the 2022 Amendment. It includes replacing batteries in alarms with replaceable cells, or replacing a sealed unit that has failed.
Landlord and tenant responsibilities
During the tenancy, the tenant is responsible for regularly testing alarms, typically monthly, and for replacing batteries in alarms with removable cells. If an alarm continues to fail after a battery change, or if the unit is sealed, the tenant should report the fault to the landlord in writing. The landlord then has a legal duty to act. Tenants must not remove or disable smoke alarms. Doing so does not remove the landlord's liability for having the alarm in place, and a landlord who can demonstrate working alarms were installed and tested at tenancy start is protected where a tenant has subsequently tampered with them.
From working with self-managing landlords across the UK, we see the most common failure point is not installation, it is the tenancy-start test. Landlords who do not document the test in the inventory or check-in report have no evidence they complied, which matters if the local authority serves a remedial notice or a tenant raises a complaint.
HMO requirements
HMO rental properties face additional fire safety obligations beyond the 2015/2022 Regulations. Licensed HMOs are subject to mandatory licence conditions which typically require interlinked fire alarm systems, fire doors, and in some cases emergency lighting and fire extinguishers. The smoke alarm regulations enforcement provisions do not apply to licensed HMOs in the same way, compliance is pursued through the licence conditions instead. Landlords managing HMOs should refer to their local authority licence conditions for the precise requirements, which vary between councils.
Enforcement and penalties
Local authorities are the enforcement body. Where a landlord has failed to meet the alarm requirements, the council may serve a remedial notice specifying what must be done within 28 days. If the landlord does not comply, the local authority can arrange for the remedial work itself (with tenant consent) and impose a civil penalty of up to £5,000. For licensed properties, non-compliance with the equivalent licence condition carries a potential civil penalty of up to £30,000. Smoke alarm compliance is one of several safety obligations tracked in August's compliance checklist, alongside gas safety certificates and EICR electrical safety reports.
Frequently asked questions
Does the law specify what type of smoke alarm to install?
The Regulations do not require a specific type. Mains-powered (hard-wired) or battery-powered alarms are both acceptable. The government guidance recommends compliance with British Standard BS 5839-6 and, where battery alarms are used, units with sealed-for-life batteries rather than replaceable cells. Local authorities may treat standalone battery alarms in higher-risk properties as a hazard under the Housing Health and Safety Rating System, even where the basic regulatory duty is met.
Do the smoke alarm regulations apply in Scotland and Wales?
The Smoke and Carbon Monoxide Alarm (England) Regulations 2015 apply in England only. Scotland has the strictest requirements of any UK nation: since February 2022, every home must have interlinked alarms covering living rooms, circulation spaces, and kitchens. Wales operates under similar broad requirements to England but landlords should check the Welsh Government guidance for precise obligations. Northern Ireland has separate building regulations.
What is a fixed combustion appliance for CO alarm purposes?
A fixed combustion appliance is any permanently installed apparatus that burns fuel, for example gas, oil, coal or wood, to generate heat. This covers gas boilers, oil boilers, log-burning stoves, open fires and similar appliances. Gas cookers are explicitly excluded from the CO alarm requirement.
