Smoke alarm rules for rented property
At least one smoke alarm is required on every storey used as living accommodation.
6 min read · Updated 2 August 2026
Overview
The Smoke and Carbon Monoxide Alarm (England) Regulations 2015, as amended in 2022, require at least one smoke alarm on every storey of a rented property used as living accommodation. Alarms must be tested and confirmed working on the day the tenancy starts, and repaired or replaced when a tenant reports a fault.
Why it matters
Local authorities can serve a remedial notice and impose a penalty of up to £5,000. Beyond the fine, a fire in a property without working alarms is an insurance and liability catastrophe.
Legal requirements
- One smoke alarm on each storey used as living accommodation.
- Alarms tested and working at the start of every new tenancy, with evidence recorded.
- Repair or replace a faulty alarm as soon as reasonably practicable after being told.
- HMOs and licensed properties may face stricter, licence-specific fire detection conditions.
Common mistakes
- Fitting alarms but never evidencing the day-one test.
- Ignoring a reported fault because the tenant removed the battery.
- Treating a loft or cellar in use as living space as exempt.
- Using 9-volt battery alarms where a licence requires mains-interlinked detection.
Practical guidance
- Photograph each alarm with the test date and file it with the inventory.
- Fit sealed 10-year lithium alarms to remove battery disputes.
- Check alarm coverage at every routine inspection and log the result.
- In Scotland, interlinked alarms in the living room, every circulation space and the kitchen are mandatory.
Frequently asked questions
How many smoke alarms do I need?
At least one on every storey used as living accommodation, tested and working on the first day of the tenancy.
Related guides
The RentDocs landlord update
Plain-English UK compliance changes, Renters' Rights Act 2025 updates and new guides — no spam, unsubscribe any time.
This guide is general information for UK landlords and letting agents, not legal advice. Rules differ across England, Wales, Scotland and Northern Ireland — check your local requirements or take advice before acting.