Landlord Smoke Alarm Requirements London — 2026 Rules

A working smoke alarm on every storey of the property used as living accommodation. For a typical two-storey house that is two alarms minimum. For HMOs and licensed lets the practical standard is much higher — BS 5839-6 LD2 interlinked detection, which is what London boroughs audit to.

Every room with a fixed combustion appliance — boiler, gas fire, oil burner, log burner. The October 2022 amendment removed the previous "solid fuel only" restriction and made the duty universal across rented homes in England. Gas hobs do not strictly count (they are moveable) but best practice is a kitchen CO alarm anyway.

On the day a new tenancy starts, the landlord (or letting agent) must test that every required smoke and CO alarm is working. The recommended evidence is a signed tenant test record. We provide a tenant signature pad in our test pack so you have the document councils ask for if a complaint lands later.

Section 21 of the Housing Act 1988 was abolished in May 2026, ending no-fault eviction. Councils uplifted enforcement to manage the resulting complaint volume, and tribunals are now the dominant route for tenant complaints. Fire-safety breach (including missing or expired alarms) became the single largest fine vector reported in the first six months of the new regime.

Civil penalty up to £5,000 for a first breach, rising to £30,000 for repeat or aggravated breaches across the same portfolio. Councils can issue penalties without going to court and recover them as a civil debt. Banning Orders are available for serial offenders.

The strict legal minimum is one working alarm on every storey (a one-bed flat is one storey, so one alarm). The practical standard in London — and the standard our customers ask for — is LD2 interlinked: one smoke alarm in the hall, one heat alarm in the kitchen, one CO alarm at the boiler, interlinked. Total cost £550-£650.

BS 5839-6 commissioning certificates do not expire as such — the install is certified once. What does need to happen is an annual engineer test (we offer this at £85) and a fresh start-of-tenancy test every time a new tenant moves in. The combination gives councils the rolling evidence trail they expect.

Indirectly, yes. The duty itself is unchanged — same 2015 Regs as amended in 2022. What has changed is that tenants now use Section 8 + tribunal routes rather than fearing retaliatory eviction. Complaints about smoke alarm absence or failure have risen sharply since May 2026 and councils investigate every one.

Yes — these are separate duties. The Electrical Safety Standards in the Private Rented Sector 2020 requires a satisfactory EICR every five years. The Smoke and CO regs require working alarms throughout. We can do both in a single visit and bundle the certificates.

Yes — any new or replaced alarm needs BS 5839-6 commissioning before sign-off. We issue a fresh certificate at every replacement so the audit clock resets and your logbook stays current.