Smoke & Carbon Monoxide Alarm Rules for Landlords
In England, landlords must fit at least one smoke alarm on every storey with living accommodation and a carbon monoxide alarm in any room with a fixed combustion appliance (excluding gas cookers), and keep them working. Wales requires mains-powered, interlinked smoke alarms on every storey plus CO alarms where there's a gas, oil or solid-fuel appliance. Scotland requires interlinked smoke alarms in the living room and every hallway/landing, a heat alarm in the kitchen, and a CO alarm near fuel-burning appliances. Non-compliance can mean a fine of up to £5,000 in England, or the property being classed as unfit to let.
In this post, we'll cover
Working smoke and carbon monoxide alarms aren't just good practice - for landlords they're a legal requirement, and the rules differ across England, Wales and Scotland. This 2026 guide explains exactly what you must fit, where it goes, who's responsible, and the penalties for getting it wrong, so you can keep your tenants safe and stay compliant.
Key takeaways
- Alarm rules are devolved - check whether your property is in England, Wales or Scotland.
- England is the least prescriptive; Wales and Scotland require mains-powered or interlinked alarms.
- In England you must prove alarms work on the first day of a new tenancy; you must repair or replace faulty alarms once told.
- Alarms sit alongside your other duties - an annual Gas Safety Certificate (CP12) and an EICR.
- Smart Cover landlord cover protects the property when boilers, plumbing or electrics break down - complementing, not replacing, your safety duties.
As a landlord, you have a legal duty to make sure the homes you let are safe. Smoke and carbon monoxide alarms are one of the clearest, most enforceable parts of that duty - and because fire safety is devolved, the exact rules depend on where in the UK your property is. Get them right and you protect your tenants, your property and yourself; get them wrong and you risk fines, invalidated positions in disputes, and far worse if the unthinkable happens.
Why it matters: Carbon monoxide is invisible and odourless, and fire spreads fast. Government guidance notes that an occupier without a working smoke alarm is far more likely to die in a fire. Alarms save lives - the rules exist for a reason.
What this guide covers
- The rules in England
- The rules in Wales
- The rules in Scotland
- Northern Ireland
- England vs Wales vs Scotland
- Where to fit alarms
- Your responsibilities & records
- Penalties & enforcement
- Your wider safety duties
1. The rules in England
Alarm requirements in England come from the Smoke and Carbon Monoxide Alarm (England) Regulations 2015, amended by the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022, which came into force on 1 October 2022 and now apply to both private and social landlords.
England | In force: 1 October 2022
What you must do
• Fit at least one smoke alarm on every storey of the property where there's a room used as living accommodation.
• Fit a carbon monoxide alarm in any room used as living accommodation that contains a fixed combustion appliance - for example a boiler, gas fire or wood burner - but excluding gas cookers.
• Repair or replace any smoke or CO alarm as soon as reasonably practicable once you're told it's faulty.
• Make sure alarms are in proper working order on the first day of each new tenancy.
England is the least prescriptive nation: the regulations don't mandate mains-powered or interlinked alarms, so battery alarms are acceptable - though following the manufacturer's instructions and the BS 5839-6 standard is good practice. During the tenancy, tenants are generally expected to test the alarms and replace any batteries they can access, but the duty to repair or replace a faulty alarm remains with you.
2. The rules in Wales
In Wales, alarm duties fall under the Renting Homes (Wales) Act 2016 and the Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022, which apply from 1 December 2022. Wales sets a higher technical bar than England.
Wales | In force: 1 December 2022
What you must do
- Fit a working smoke alarm on every storey of the dwelling.
- Smoke alarms must be mains-powered (connected to the electrical supply) and interlinked - so when one sounds, they all sound. Interlinking can be hard-wired or wireless.
- Fit a carbon monoxide alarm in every room containing a gas, oil or solid-fuel burning appliance. Note that in Wales this includes gas cookers, unlike England.
- Keep the alarms in repair and proper working order throughout the occupation contract.
If a landlord fails to meet these requirements, the dwelling is treated as unfit for human habitation under the Act - a serious status that affects your ability to let the property and to rely on certain notices.
3. The rules in Scotland
Scotland's standard changed on 1 February 2022 and now applies to every home, owned or rented. For rented properties it forms part of the Repairing Standard that landlords must meet.
Scotland | In force: 1 February 2022
What you must do
- Fit one smoke alarm in the living room or the room most used during the day.
- Fit one smoke alarm in every circulation space on each storey - hallways and landings.
- Fit one heat alarm in every kitchen.
- All smoke and heat alarms must be ceiling-mounted and interlinked.
- Fit a carbon monoxide alarm wherever there's a carbon-fuelled appliance (boiler, fire, heater, stove) or a flue. CO alarms don't need to be interlinked with the fire alarms.
Alarms in Scotland can be either sealed long-life battery units or mains-powered (mains alarms must be fitted by a qualified electrician). The interlinking requirement - so a fire anywhere triggers every alarm - is the defining feature of the Scottish standard.
4. Northern Ireland
Northern Ireland does not have a single equivalent set of alarm regulations for existing rented homes. Smoke alarm requirements largely arise through Building Regulations (Northern Ireland) for new and materially altered properties, and landlord obligations have been strengthened under the Private Tenancies Act (Northern Ireland) 2022. If your property is in Northern Ireland, check the current position with nidirect and the Northern Ireland Housing Executive before you let.
5. England vs Wales vs Scotland at a glance
Requirement | England | Wales | Scotland |
Smoke alarms | 1 per storey with living accommodation | 1 per storey | Living room + every hallway/landing |
Heat alarm (kitchen) | Not required | Not required (optional) | Required |
Power supply | Battery or mains | Mains-powered | Sealed long-life battery or mains |
Interlinked? | Not required | Yes | Yes (smoke & heat) |
CO alarm | Rooms with a fixed combustion appliance (excl. gas cookers) | Rooms with a gas, oil or solid-fuel appliance (incl. gas cookers) | Rooms with a carbon-fuelled appliance or flue |
In force | 1 Oct 2022 | 1 Dec 2022 | 1 Feb 2022 |
This table is a summary - always check the full regulations for your nation, as the detail (and any future changes) governs.
6. Where to fit alarms
Correct placement matters as much as having the right number. As a general guide:
- Smoke alarms: ceiling-mounted, central to the room or hallway, away from walls and corners.
- Heat alarms: in the kitchen, where a smoke alarm would cause false alarms from cooking.
- Carbon monoxide alarms: in the same room as the fuel-burning appliance. Follow the maker's instructions - many recommend head height, roughly 1 to 3 metres horizontally from the appliance, and not boxed in.
- Avoid fitting alarms in bathrooms or directly above cookers, where steam and fumes trigger false alarms.
Standard to follow: BS 5839-6 covers the design and installation of alarms in domestic properties and is a sensible benchmark, especially in England where the regulations are less specific.
7. Your responsibilities & keeping records
Whatever nation you're in, a simple routine keeps you compliant and gives you evidence if a dispute ever arises:
- Fit the correct alarms for your nation before the tenancy begins.
- In England, test that every alarm works on the first day of each new tenancy - and record it.
- Give tenants written instructions on testing alarms and reporting faults.
- Repair or replace faulty alarms promptly once notified.
- Note each alarm's replacement date (most last around 10 years - check the unit).
- Keep a dated log of installation, tenancy checks and any repairs.
Encourage tenants to test alarms monthly and never to remove batteries or disconnect a unit. A quick line in your welcome pack goes a long way.
8. Penalties & enforcement
The consequences of non-compliance are real and vary by nation:
- England: local housing authorities can serve a remedial notice. If you don't comply within 28 days, they can arrange the work and issue a civil penalty of up to £5,000.
- Wales: failing to meet the alarm requirements makes the property unfit for human habitation under the Renting Homes (Wales) Act, with knock-on effects for letting and possession.
- Scotland: the standard is enforced through the Repairing Standard; tenants can apply to the First-tier Tribunal, and local authorities have enforcement powers.
Beyond fines, non-compliance can undermine your position in deposit or possession disputes and may affect insurance claims. The cost of compliance is tiny by comparison.
9. How alarms fit your wider landlord safety duties
Smoke and CO alarms are one piece of the landlord safety picture. The other core duties for most rented homes are:
- Annual Gas Safety Check (CP12): a Gas Safe registered engineer must check gas appliances and flues every year and issue a Gas Safety Certificate.
- Electrical safety (EICR): an Electrical Installation Condition Report, typically every five years, confirming the wiring is safe.
- General repair and maintenance: keeping the boiler, heating, plumbing and structure in good working order.
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Official sources
- GOV.UK - Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022: guidance for landlords and tenants.
- GOV.WALES - Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022.
- GOV.SCOT - Fire and smoke alarms in Scottish homes: the law.
Always check the current regulations and your local authority, as rules can change and this guide is a summary.
Found this useful? Explore more landlord and home-safety guides on the Smart Cover blog.
Disclaimer
This article is general information only and is not legal advice. Smoke and carbon monoxide alarm requirements are set by law, are devolved across the UK, and can change - landlords are responsible for complying with the current regulations that apply to their property and should check GOV.UK, GOV.WALES, GOV.SCOT, nidirect or their local authority, and take professional advice where needed. Cover, eligible items, limits and exclusions vary by plan - please read the policy documents and Insurance Product Information Document (IPID) before purchasing. © 2026 Smart Cover. All rights reserved.
Coverage is subject to eligibility, exclusions, and claim limits. Please read the full policy terms and conditions before purchasing. Smart-Cover is a trading name of Smart-Cover Direct Limited (FRN 600428), which is an appointed representative of City and Commercial Limited (FRN 314346), authorised and regulated by the Financial Conduct Authority.
