This is one of the most common questions we hear from both sides of a tenancy, and the confusion is understandable, since both landlord and tenant do carry some responsibility. The split, however, is clearly defined in law, and it is not an even split.
The Landlord’s Responsibilities
Under the Residential Tenancies (Smoke Alarms and Insulation) Regulations 2016, the landlord carries the primary legal obligation. This covers installing compliant photoelectric alarms in the required locations, ensuring alarms are working at the start of every new tenancy, and ensuring they remain in working order for the duration of the tenancy.
This is a standing obligation, not a one-off installation task. If an alarm stops working during a tenancy, whether from a flat battery, a fault, or reaching the end of its service life, it is the landlord’s responsibility to get it fixed, not the tenant’s to quietly work around it.
The Tenant’s Responsibilities
Tenants are not left with no role at all. The Residential Tenancies Act requires tenants not to interfere with, damage, or disable a smoke alarm, which includes removing batteries to silence nuisance beeping rather than reporting the issue. Tenants are also expected to report a fault or a non-working alarm to the landlord or property manager promptly, since the landlord cannot act on a problem they do not know about.
Landlord tenant smoke alarm responsibility NZ questions almost always come back to this split: the landlord owns the compliance obligation and the fix, the tenant owns not tampering with the unit and reporting problems when they occur.
Where the Confusion Usually Comes From
Replaceable batteries. In an older rental with a standard alarm, a tenant might assume replacing a dead battery is their responsibility, similar to a household appliance. For alarms that take a replaceable battery, this is often handled informally between landlord and tenant, but the compliance obligation and liability for a non-working alarm sits with the landlord regardless of who physically changes a battery.
Disabling a nuisance alarm. A tenant frustrated by a smoke alarm triggering from cooking might remove the battery rather than report a mismatched alarm type. This is technically a breach of the tenant’s obligations, but it is also a sign the landlord has the wrong alarm type installed for that room, which is worth fixing at the source rather than relying on the tenant not to touch it.
End of tenancy condition. A departing tenant is not responsible for an alarm reaching the end of its 10-year service life during their tenancy. That is a landlord maintenance issue, not a bond deduction matter, provided the alarm was not damaged or tampered with.
What Good Practice Looks Like in Practice
For landlords, this means treating smoke alarms as an ongoing maintenance item with a tracked installation date, not a box ticked once at the start of a tenancy. For tenants, it means reporting a problem rather than disabling the unit, since a working alarm protects the people actually living in the property.
We supply the CAVIUS photoelectric range with long-life sealed batteries specifically to reduce how often this question comes up at all, since a 10-year unit removes the ambiguity around who replaces a battery partway through a tenancy. Our earlier piece on smoke alarms and the Residential Tenancies Act covers the wider legal framework in more depth if you want the full picture beyond this specific question.
Frequently Asked Questions
Can a landlord charge a tenant for a flat battery?
Generally no, since maintaining a working alarm is a landlord obligation. This is different from a case where a tenant has deliberately damaged or removed a unit.
What should a tenant do if an alarm keeps beeping?
Report it to the landlord or property manager immediately rather than removing the battery, since a working alarm is a safety requirement, not an optional comfort item.
Is a tenant liable if a smoke alarm is missing at the end of a tenancy?
If a tenant has removed or damaged a unit, this can become a bond matter. A unit simply reaching end of life through normal use is not a tenant liability.
The Bottom Line
The law places the compliance obligation squarely with the landlord, while tenants carry a narrower responsibility not to interfere with alarms and to report problems. Most disputes come from both sides misunderstanding where that line actually sits, not from any genuine ambiguity in the law itself.