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.

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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.