Smoke alarm testing: landlord duties and tenant responsibilities

Landlords must ensure a working smoke alarm on every storey used as living accommodation at the start of a tenancy, but day-to-day testing usually falls to the tenant.

4 min read · Updated 2 August 2026

Overview

Landlords must ensure a working smoke alarm on every storey used as living accommodation at the start of a tenancy, but day-to-day testing usually falls to the tenant.

Landlord's duty at check-in

Confirm every required alarm is fitted and working on the first day of the tenancy, and record this in the inventory.

Tenant's ongoing role

Tenants are generally expected to test alarms regularly and report faults promptly, as set out in most tenancy agreements.

Responding to a reported fault

Replace batteries or the unit itself as soon as practicable once notified; delay could be treated as a breach of duty.

Interlinked systems in HMOs

Larger HMOs often require an interlinked, mains-wired alarm system rather than standalone battery alarms.

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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.