Landlord smoke alarm regulations
Updated: October 2026
You have just bought a rented flat, or you are checking a house you own, and one sentence that says UK law requires a smoke alarm will send you to the wrong product. Landlord smoke alarm regulations are four duties, plus a new-build rule that catches owner-occupiers in England when the house is new. This map uses the public GOV.UK, Scottish, Welsh and Northern Ireland pages. It is not a solicitor’s opinion. Listings, where prices appear, are from amazon.co.uk on 19 October 2026. A qualifying purchase can earn a commission at no extra cost to you. The shop page is the [smoke alarm comparison](/hub/fire-protection/smoke-alarm). None of the twelve battery alarms there is mains-powered or radio-interlinked.
You have just bought a rented flat, or you are checking a house you own, and one sentence that says UK law requires a smoke alarm will send you to the wrong product.
You have just bought a rented flat, or you are checking a house you own, and one sentence that says UK law requires a smoke alarm will send you to the wrong product. Landlord smoke alarm regulations are four duties, plus a new-build rule that catches owner-occupiers in England when the house is new. This map uses the public GOV.UK, Scottish, Welsh and Northern Ireland pages. It is not a solicitor’s opinion. Listings, where prices appear, are from amazon.co.uk on 19 October 2026. A qualifying purchase can earn a commission at no extra cost to you. The shop page is the smoke alarm comparison. None of the twelve battery alarms there is mains-powered or radio-interlinked.
Our top picks
| Badge | Product | Power | Link to other alarms | Standard claimed | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  XUK XUK Wi-Fi smoke alarm | Replaceable cell | Phone alert, not interlink | Not stated | 5.4 | about £21.99 | View offer |
| Best value |  STATUS STATUS 9 V | 9 V, replaceable | Standalone | Not stated | 7.1 | about £6.97 | View offer |
 FireAngel FireAngel FA6620 | 10-year sealed | Standalone | BS EN 14604 and UKCA | 9.3 | about £11.98 | View offer |
On this page
England, rented and owner-occupied
The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, as amended, apply to landlords, and from 1 October 2022 that includes social landlords. Regulation 4 requires at least one smoke alarm on each storey used wholly or partly as living accommodation. Halls and landings count, and so does a storey whose only living accommodation is a bathroom or lavatory. Check the alarms on the day a new tenancy begins. If a tenant reports a fault, repair or replace as soon as reasonably practicable.
The regulations do not mandate a brand, a sealed cell or mains. The GOV.UK booklet prefers sealed batteries and points at BS 5839-6. A battery optical alarm can meet the English storey duty. If you own the home and live in it, those regulations do not order you to fit an alarm.
Scotland, every home
Since February 2022 the standard applies to every Scottish home, owned or rented. It is the owner’s responsibility. Guidance asks for a smoke alarm in the living room, a smoke alarm in every hall and landing, and a heat alarm in the kitchen, all on the ceiling and all interlinked, so that when one sounds the others sound. Interlink is by wire or by radio. A phone notification is not that link.
You can fit sealed tamper-proof long-life lithium alarms yourself, or have an electrician fit mains. User-replaceable batteries are rejected. A single sealed FireAngel on the landing is incomplete. Heat alarms in the Scottish note are BS 5446-2:2003. None of these twelve listings is that heat alarm, and none links to a second sounder.
Wales and Northern Ireland
In Wales, regulation 5 of the Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022 requires a working smoke alarm on every storey of a rented dwelling, on the electrical supply and linked to the other mains smoke alarms. The mains link is an electrician’s job, which is why the how to fit a smoke alarm page stops at battery discs. Owner-occupied homes in Wales are not under that rented regulation in the same way.
Northern Ireland private tenancies need interlinked smoke alarms in the main living room and every circulation space, a heat alarm in every kitchen, hard-wired or sealed-battery, to BS 5839-6, plus a carbon monoxide alarm where there is a fixed combustion appliance or a flue. A replaceable 9 V disc is the wrong power source. A sealed standalone disc is only a start.
New dwellings are a different rule
The Approved Document B FAQ describes the minimum for new dwellinghouses in England as Grade D2, Category LD3: mains smoke alarms with a standby supply, to BS EN 14604, in the hall and landing. A battery alarm does not meet that, however many stars it has. It can be an extra. If a mains head chirps, repair the mains system. Do not swap it for a screw-on cell. Compliance is the nation, the tenure, the rooms, the power and the link.
Match the nation before you shop
A battery disc can meet an English landlord’s storey duty and still fail as the only system in Scotland, in a Welsh rented flat, in a Northern Ireland private tenancy, or in a new English dwelling. Once a battery alarm is actually allowed, choose the room, the sensor and the cell.
Common questions
I own my home in England. Do I have to fit a smoke alarm?
The 2015 regulations, as amended, do not impose that duty on an owner-occupier. They bind landlords, including social landlords from 1 October 2022. GOV.UK still advises at least one working alarm on every level of your own home. If the house is a new dwelling, Building Regulations are a separate requirement, and a battery-only set is not the Grade D2 LD3 minimum described for a new English dwellinghouse.
What must an English private landlord fit, and when?
At least one smoke alarm on every storey that has living accommodation, checked on the first day of a new tenancy, plus a carbon monoxide alarm for fixed combustion appliances other than gas cookers. If a tenant reports a fault, repair or replace as soon as reasonably practicable. The type is not mandated. Sealed cells are preferred. The civil penalty, after a remedial notice, is up to £5,000. That figure is England’s.
Can a Welsh landlord use a battery alarm on its own?
Not as the required alarms. Regulation 5 expects those alarms on the electrical supply and linked to each other. Battery alarms are allowed as extras once the mains interlinked minimum is in place. A box of battery discs from amazon.co.uk does not, by itself, meet a Welsh rented contract. If you are a contract-holder, ask whether the mains alarms are present before you add a battery extra.
What changed for private tenancies in Northern Ireland in 2024?
Private landlords must provide interlinked smoke alarms in the main living room and every circulation space, a heat alarm in every kitchen, hard-wired or with a sealed battery, to BS 5839-6, plus a carbon monoxide alarm for a fixed combustion appliance or a flue. New tenancies from 1 September 2024, existing ones by 1 December 2024. A loose 9 V alarm does not meet the power rule.
Who pays the penalty, and how much is it in England?
The landlord pays, after a remedial notice, and the civil penalty in England is up to £5,000. Do not use that number for other nations. Ards and North Down describes a £500 fixed penalty per offence under the Northern Ireland private-tenancy alarm rules. Scotland and Wales publish their own enforcement routes. The penalty follows the missing system, not a particular ASIN.
Related pages
Sources
Public UK sources, last checked on 19 October 2026.
- GOV.UK smoke and carbon monoxide alarm Q&A for landlords (retrieved 19 October 2026)
- The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, regulation 4 (retrieved 19 October 2026)
- Approved Document B fire safety frequently asked questions (retrieved 19 October 2026)
- Scottish Government fire and smoke alarms in Scottish homes (retrieved 19 October 2026)
- Renting Homes (Fitness for Human Habitation) (Wales) Regulations 2022, regulation 5 (retrieved 19 October 2026)
- The Smoke, Heat and Carbon Monoxide Alarms for Private Tenancies Regulations (Northern Ireland) 2024 (retrieved 19 October 2026)
- London Fire Brigade smoke alarms and heat alarms (retrieved 19 October 2026)
- GOV.UK fire safety in the home (retrieved 19 October 2026)