Tenant reports mould or a leak: what NZ landlords should do in the first 24 hours

If a tenant reports mould, damp, or a leak, the first 24 hours should be about triage, evidence, and the next clear action. Acknowledge the report, check whether there is active water entry or safety risk, decide whether make-safe work is needed, and record what happens before the issue turns into a dispute.

This is general information for New Zealand landlords, not legal advice. Use Tenancy Services and qualified professionals as the source of truth for legal and technical decisions.

What should a landlord do first when a tenant reports mould or a leak?

Start by separating the problem into three lanes: immediate risk, likely cause, and follow-up evidence. That keeps the response calm and prevents the issue from sitting in a vague "will look into it" state.

In the first message back to the tenant, ask for:

• photos or video
• the exact room and location
• when it started
• whether the issue is getting worse
• whether water is actively entering
• whether power points, light fittings, ceilings, flooring, or security are affected
• whether anyone's health or safety is being affected now

The goal is not to diagnose everything by message. The goal is to decide whether the next step is urgent make-safe work, inspection, cleaning, ventilation/heating checks, or routine maintenance.

When is the first response urgent?

Treat the first response as urgent when waiting is likely to increase injury risk, health risk, or property damage. Tenancy Services says tenants must tell the landlord straight away if something needs repairing or maintaining, and urgent repairs can apply where disrepair is likely to cause injury to people or property.

For mould, damp, or leaks, urgent signs include:

• active water coming through a ceiling, wall, light fitting, or floor
• a leak near electricity
• sagging plasterboard or signs a ceiling may fail
• wet carpet or flooring spreading quickly
• no working drainage or sanitation
• a broken window, roof issue, or door issue that leaves the property exposed
• mould or dampness connected to a known leak that is getting worse

If any of those are present, the first job is to make the property safe and limit further damage. The full repair can follow, but the make-safe decision should not wait behind routine admin.

What should the landlord check before blaming condensation?

Check for water entry and building-system issues before treating mould as only a tenant-behaviour problem. Mould can be linked to ventilation habits, but dampness often starts with leaks, drainage, moisture ingress, weak extraction, poor heating, insulation issues, or draughts.

Use this order:

1. Is water entering from the roof, cladding, windows, doors, plumbing, or wet-area seals?
2. Are gutters, downpipes, drains, and ground drainage working?
3. Are bathroom and kitchen extractors working and venting outside?
4. Can windows and doors open for ventilation where required?
5. Is fixed heating working properly in the main living area?
6. Are there draught gaps, damaged seals, or cold surfaces making moisture worse?
7. Is there enough evidence to show what was checked and what was decided?

This order protects the landlord as well as the tenant. If the issue is caused by a leak or failed system, cleaning the visible mould without fixing the source just resets the problem.

What should happen in the first 24 hours?

A good first-24-hours workflow is simple:

1. Acknowledge the report and ask for specific evidence.
2. Triage the issue as emergency, urgent, routine, or monitoring.
3. If there is active water, electrical risk, structural risk, or worsening damage, arrange make-safe work.
4. If the source is unclear, book an inspection or qualified trade check.
5. Give the tenant a short update with what happens next and what to do if the issue worsens.
6. Save the photos, messages, decision, trade notes, and follow-up date in one place.

The update matters. Tenants often chase because they do not know whether the issue has been seen, triaged, or booked. A clear first update reduces repeat messages and creates a record of the decision.

What should the tenant update say?

Keep it plain and specific. A useful first update might say:

Thanks for sending this through. Please send photos of the affected area, when it started, and whether water is actively coming in. We will triage this today. If water reaches power points, ceilings start sagging, or the issue worsens quickly, tell us straight away so we can treat it as urgent make-safe work.

Once you know the next step, update again:

We have treated this as an urgent leak check and are arranging inspection/make-safe work. Please avoid the affected area if it looks unsafe, and send any new photos if the water spreads before the contractor arrives.

The exact wording should match the real situation. Do not promise a repair time you cannot meet, and do not imply fault before the cause is understood.

What evidence should landlords keep?

Keep the record close to the property and the maintenance job, not scattered across text messages and email.

Save:

• tenant photos and videos
• timestamps and message history
• your triage decision
• inspection notes
• contractor advice
• quotes, invoices, and reports
• before/after photos
• tenant updates
• the follow-up date

Healthy Homes issues are not only about physical repairs. They are also about being able to show what was reported, what was checked, what work was arranged, and what remains unresolved.

How does this connect to Healthy Homes?

Mould, damp, and leaks can touch several Healthy Homes areas. Tenancy Services lists the Healthy Homes standards as heating, insulation, ventilation, moisture ingress and drainage, and draught stopping. Its guidance also says rental homes need to be free from mould and dampness before being rented out, while tenants need to keep the home well-aired and remove mould straight away during a tenancy.

For landlords, the practical point is this: a mould report is not just a cleaning issue. It can be a signal to check ventilation, heating, drainage, moisture ingress, insulation, draught stopping, and maintenance records.

Where Keel fits

Keel does not replace a builder, plumber, electrician, assessor, or legal adviser.

It helps with the operating layer around the response:

• tenant reports come into one place
• photos and context stay attached to the rental
• urgency can be triaged before the job drifts
• approvals and contractor steps are easier to track
• follow-up dates and evidence do not live in memory

That is the difference between reacting to a mould photo and running a calm landlord workflow.

If you want Keel to help keep rental maintenance, tenant updates, and follow-up evidence in one operating layer, see how Keel works for landlords.

Source notes

• Tenancy Services, Mould and dampness.
• Tenancy Services, Damage and repairs.
• Tenancy Services, Healthy homes standards - what a landlord needs to know.
• Tenancy Services, Moisture ingress and drainage standard.