Smoke Alarms, CO Alarms & PAT Testing for Holiday Lets UK

Three of the most common compliance questions UK holiday let hosts ask map to the same regulatory cluster: smoke alarms, carbon monoxide alarms, and PAT testing. None of them sit in a single statute; all three are routinely checked by environmental health officers, fire and rescue authorities, and insurers; and the specifications hosts most often get wrong are the BS standards on the alarms themselves.

This guide pulls the three together — what specifications are required, what cadence applies, and where to capture the records that platforms and insurers now ask for.

This is general guidance, not regulatory advice. Specific specifications can vary by property type and local fire and rescue authority. Confirm with a competent fire safety engineer or registered electrician for a particular property.

Smoke Alarms

The relevant statutory framework for England is the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022, which came into force on 1 October 2022. They amend the Smoke and Carbon Monoxide Alarm (England) Regulations 2015.

The 2015 + 2022 regulations were drafted primarily for the private rented sector — assured-shorthold tenancies, not short-term lets. Strictly, the regulations don't apply to a typical holiday let. But the HSE, fire and rescue authorities, and insurers all treat the same specifications as the applicable standard for holiday lets via:

• The general duty of care under HSWA 1974 section 3
• The Regulatory Reform (Fire Safety) Order 2005 risk-assessment duty (covered in our fire risk assessment guide)
• Insurer requirements for specialist holiday let cover
• Platform attestation prompts (Airbnb / Booking.com / Vrbo)

The default specification UK holiday lets are now expected to meet:

Element	Specification	Notes
Alarm system grade	BS 5839-6 Grade D1 or LD2 (mains-powered with battery backup, interlinked)	Domestic Grade D battery-only alarms are below the standard expected for a let property
Coverage	Every storey used as living accommodation; in or adjacent to every escape route	Bedroom corridors, landings, kitchens (heat alarm in kitchen, not smoke), living spaces
Type	Optical smoke + heat (kitchen) — combined where appropriate	Ionisation alarms are less suitable for cooking-zone false-alarm management
Test cadence	Functional test at every changeover	Brief log in the guest welcome book is the audit trail many hosts use
Battery / unit replacement	Per manufacturer's cycle — typically 10 years	Calendar-tracked; documented replacement

Domestic battery-only smoke alarms remain better than nothing but fall short of the standard most insurers and platforms now expect. Where the property has electricity, the cost differential between battery and mains-with-backup is small — typically £20-£40 per alarm.

Carbon Monoxide Alarms

The Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 extended the CO alarm requirement to every room with a fixed combustion appliance, regardless of fuel type — not only the previous solid-fuel scope.

For a UK holiday let, that means:

• Gas boiler room → CO alarm
• Kitchen with gas hob → CO alarm
• Living room with wood-burner → CO alarm
• Bedroom with gas fire → CO alarm

The relevant standards:

Element	Specification
Alarm standard	BS EN 50291-1
Placement	Per manufacturer's installation instructions (typical: head height, within 1-3m of the appliance, not directly over it)
Replacement	Per unit's stated life — typically 5-10 years; replacement date marked on unit
Test	Quarterly minimum; ideally at each changeover

Carbon monoxide poisoning remains a fatal risk in UK holiday accommodation — typically associated with poorly-maintained gas heating, blocked flues, and wood-burners without working CO alarms. The cost of an audible CO alarm is £15-£40; replacing one annually rather than waiting for the unit's stated life is a cheap insurance.

For wood-burners specifically: an annual chimney sweep certificate (typically from a HETAS-registered or NACS / APICS-registered sweep) is expected alongside the CO alarm. Many insurers require both.

PAT Testing (Portable Appliance Testing)

PAT testing has no statutory requirement on its own — the relevant law is the Electricity at Work Regulations 1989 and HSWA 1974 section 3, which jointly require that electrical equipment provided for use is maintained in a safe condition. PAT testing is the common evidential method of demonstrating that maintenance.

For a holiday let, the practical expectation (driven by insurers, environmental health officers, and platform attestation) is:

• All portable appliances supplied with the property PAT tested annually
• A current PAT test record retained
• Visual inspection at each changeover (cracked plugs, frayed cables, exposed conductors)

The classes of appliance covered are typically: kettles, toasters, microwaves, hairdryers, irons, lamps, TVs, hi-fi/speakers, fans, heaters, vacuum cleaners, blenders, food processors, computer chargers (if provided), and any portable cooking equipment.

Cost: a single-property PAT test typically runs £60-£120 depending on appliance count. Some insurers will accept self-conducted visual inspection logs in lieu of formal annual PAT testing for low-risk single properties — check the schedule wording.

How These Sit Alongside the EICR

PAT testing covers portable appliances; the BS 7671-conforming Electrical Installation Condition Report (EICR) covers the fixed installation: the consumer unit, sockets, lighting circuits, fixed appliances (electric showers, immersion heaters, electric boilers), and the earthing/bonding system.

EICRs run every 5 years (or change of occupancy, which technically every guest-changeover satisfies but is universally interpreted as the 5-year cycle for short-term lets). PAT testing runs annually.

Both records form part of the standard holiday let compliance pack.

What to Capture in the Compliance Pack

A minimal evidence pack for the smoke / CO / PAT cluster:

1. Layout sketch showing alarm positions
2. Alarm purchase / installation receipts with model numbers + BS standards cited
3. Test log (one entry per changeover or per quarter — keep it simple)
4. Replacement-date calendar for each alarm
5. Chimney sweep certificate (annual, if applicable)
6. PAT test certificate (annual)
7. EICR certificate (within 5 years)

Hold this somewhere the operator can pull it from quickly when a platform, an insurer, or an environmental health officer asks. For the broader compliance pack across all categories, use our free Compliance Checklist Generator.

Sources

• Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022
• Smoke and Carbon Monoxide Alarm (England) Regulations 2015
• Electricity at Work Regulations 1989
• Health and Safety at Work etc. Act 1974
• BS 7671 Wiring Regulations (IET)
• GOV.UK — Smoke and CO alarm regulations: explanatory booklet