It is one of the most-argued questions in New Zealand tenancy, and the answer is genuinely situation-dependent. It turns on two things: when the problem started and what caused it. The same logic applies whether you are arranging pest treatment for rental properties or disputing who should pay for it.
This guide explains how it usually breaks down, what the law actually says, and what to do if you are stuck in a disagreement. It is general information, not legal advice — for your specific situation, Tenancy Services and the Citizens Advice Bureau both give free guidance.
The general rule
In short
An infestation that existed at the start of the tenancy, or that results from the condition of the building, is generally the landlord's responsibility. An infestation caused by how the tenant lives in the property is generally the tenant's. Most disputes are arguments about which of those two applies.
What the law requires
Under the Residential Tenancies Act 1986, landlords must provide and maintain the premises in a reasonable state of repair, and must comply with all building, health and safety requirements that apply to the property. A significant pest infestation arising from the state of the building falls squarely within that.
Tenants, in turn, must "keep the premises reasonably clean and reasonably tidy" (section 40(1)(c) of the Act), must not intentionally or carelessly damage the premises, and must tell the landlord promptly about problems needing repair. Cleanliness is where most pest disputes turn: a tenant who keeps a rental property reasonably clean has done their part, and one who lets rubbish and food waste build up has not. A tenant who notices rodents and says nothing for four months has also weakened their position considerably.
Tenancy Services' guidance on pests puts it plainly. Landlords must make sure the property is free of pests at the start of a tenancy, and tenants must keep it in a condition that does not encourage pests. Where pests were not there at the start and nobody caused them, responsibility is unclear, and landlords and tenants often split the cost. If a property needs fumigating, the landlord should generally pay, and if a tenant's lack of cleanliness caused an infestation, the Tenancy Tribunal can order the tenant to pay.
The Healthy Homes Standards do not regulate pests directly, but they overlap in practice. The draught stopping standard requires unreasonable gaps and holes in walls, floors, ceilings, windows and doors to be blocked — and those are precisely the gaps rodents use. The moisture ingress and drainage standard addresses the damp conditions that support cockroaches and encourage rodent harbourage. A property failing Healthy Homes is very often a property with a pest problem, and the two issues are worth raising together.
Usually the landlord's responsibility
- Infestation present at the start of the tenancy. If pests are there on day one, they are not the tenant's doing. This includes flea pupae left dormant by previous occupants' animals — see fleas in a house with no pets.
- Rodents entering through gaps in the building. Damaged subfloor vents, unsealed service penetrations, gaps at the roof line, broken cladding. These are maintenance issues.
- Problems arising from drainage or plumbing faults. A broken gully trap seal letting Norway rats in, or a leak creating the damp conditions cockroaches need.
- Wasp nests in the structure or on the grounds. Nests in wall cavities, roof spaces, banks or retaining walls are a property matter and a safety issue.
- Structural or environmental factors. Overgrown boundary vegetation the landlord is responsible for, or a subfloor that cannot be closed off.
- Anything covered by the Healthy Homes Standards. Draught stopping and moisture requirements both bear directly on pest access.
Usually the tenant's responsibility
- Fleas from the tenant's own pet. Straightforward, and the most common example.
- Infestations caused by food waste or rubbish handling. Where accumulated waste or poor storage has attracted and sustained pests.
- Pests brought in with the tenant's belongings. German cockroaches travelling in with second-hand appliances or boxes, for example.
- Problems made worse by not reporting them. A tenant who notices early signs and waits months may be liable for the additional damage caused by the delay.
The genuinely grey areas
Plenty of situations do not resolve cleanly, and it is worth being honest about that.
Rodents in a property backing onto bush or reserve. Common right across the North Shore and West Auckland. Nobody caused it and nobody can eliminate it. In practice the sensible outcome is the landlord addressing the building envelope — sealing gaps, maintaining vents — while the tenant manages food waste and reports activity promptly.
Mice arriving in autumn. The most common rental pest call we get. Mice move indoors from March as outdoor food runs out, and they need a gap of only about 6 mm. If they are getting in through an unsealed pipe penetration or a damaged vent, sealing it is the landlord's job. If the kitchen has open food, crumbs and overflowing bins, the tenant's cleanliness is part of the problem too. The fair and usual outcome is shared: the landlord pays for treatment and proofing, the tenant fixes food storage, and both keep a dated record. Our guide to the early signs of mice and rats helps with the record.
Ants in a new build. Extremely common in Flat Bush and Westgate where construction has disturbed established colonies. Not caused by anybody's behaviour. Usually treated as a property matter.
Cockroaches in an apartment building. German cockroaches move between units through risers and shared plumbing, so a unit can be infested from next door regardless of how it is kept. This is frequently a body corporate matter rather than an individual tenancy one — see cockroaches in Auckland apartments.
Bed bugs in a rental
Bed bugs are one of the hardest cases to assign, because cause and timing are genuinely difficult to establish. They may have arrived in a tenant's luggage after travel, been present at move-in and gone unnoticed for weeks, or spread from a neighbouring unit through shared walls. Bites often lag behind the infestation, so the date someone first noticed them says little about when it started.
The same framework applies. An infestation present at the start of the tenancy, or coming from another unit, points towards the landlord or body corporate; one introduced with the tenant's belongings points towards the tenant. Either way, the tenant should report it in writing straight away and the landlord should act quickly, because bed bugs spread room to room and unit to unit while the argument continues. Prompt bed bug treatment is almost always cheaper than the delay.
If you're a tenant
Report it in writing, immediately
Email or text, so there is a dated record. Describe what you have seen, where, and when it started. Verbal reports are worth far less if it ends up in dispute.
Document everything
Photos with dates. Droppings, damage, the pest itself, and any gaps or faults you think are letting them in.
Don't let it escalate
Delay both worsens the infestation and weakens your position. Keep the property clean and store food securely in the meantime.
Ask for a timeframe
Request that it is addressed within a reasonable period, in writing. What is reasonable depends on severity — a wasp nest by the front door is not a four-week job.
Escalate if you need to
Tenancy Services provides free information and mediation. Beyond that, the Tenancy Tribunal can make a binding order.
If you're a landlord or property manager
Treat between tenancies
A treatment and written record at changeover establishes the property's condition at the start of the tenancy. That document is frequently the deciding evidence if a dispute comes up later, and it costs far less than the argument.
Fix the building, not just the pest
Repeatedly paying for treatments while leaving a rat-sized gap of about 12 mm open is the most expensive possible approach. Get the proofing list and act on it.
Respond promptly to reports
Both because you are required to, and because a small rodent problem in April is a much cheaper problem than the same one in July.
Keep the records
Dates, invoices, treatment reports, and the recommendations you acted on. We provide a written treatment record for exactly this purpose.
Be realistic in the tenancy agreement
A blanket clause making the tenant responsible for all pest control regardless of cause is unlikely to be enforceable and tends to sour the relationship without achieving anything.
What it costs
Worth knowing before the argument, because the sums involved are often smaller than the time spent disputing them. In Auckland, a single-pest residential treatment runs $150 to $350 including GST, and a full multi-pest home treatment $320 to $580. Full ranges are on our cost guide.
We provide a written treatment record with every job — what was found, what was applied, where, and what proofing work is needed. Landlords and property managers use these both for maintenance records and as evidence of property condition. If you need a report suitable for a Tribunal application, tell us when you book and we will make sure it covers what is needed.
Frequently asked questions
Is pest control the landlord's responsibility in New Zealand?
Generally yes where the infestation existed at the start of the tenancy, or where it results from the condition of the building — gaps, damaged vents, drainage faults, dampness. Landlords must provide and maintain premises in a reasonable state of repair and comply with the Healthy Homes Standards. Where the problem arises from how the tenant lives in the property, it is more likely the tenant's.
Can a landlord charge a tenant for pest control?
Only where the tenant caused the problem through their own act or omission — for example fleas from their pet, or an infestation resulting from food waste being left. A landlord cannot simply pass on the cost of a pre-existing or building-related infestation, and a blanket clause in a tenancy agreement making the tenant responsible for all pest control is unlikely to hold up.
What if pests appear a month after moving in?
Timing is strong evidence but not conclusive. Rodents and fleas commonly take weeks to become noticeable — flea pupae in particular can lie dormant for months and hatch once a property is occupied again. An infestation appearing shortly after move-in usually points to a pre-existing problem, which is the landlord's responsibility.
Do the Healthy Homes Standards cover pests?
Not directly — the standards cover heating, insulation, ventilation, moisture ingress and drainage, and draught stopping. But they overlap heavily in practice. Unblocked gaps addressed under draught stopping, and moisture and drainage requirements, all reduce pest access and harbourage. A property failing on moisture is frequently a property with a pest problem.
How do I resolve a pest dispute with my landlord?
Raise it in writing first, describing the problem and asking for it to be addressed within a reasonable timeframe. Keep photos and dates. If it is not resolved, you can apply to the Tenancy Tribunal, and Tenancy Services offers free information and a mediation service before it gets that far.
