An NCAT mould claim is the formal escalation step for NSW tenants after a landlord has refused to address a serious mould problem and Fair Trading mediation has failed or been declined. Taking a mould dispute to NCAT is a real option with real outcomes available, including repair orders, compensation and rent reduction, but the strength of your case depends heavily on how thoroughly you documented the problem before arriving at the tribunal. This guide covers the practical steps. It is general information only and is not legal advice: contact the Tenants’ Union of NSW or a licensed lawyer for advice specific to your situation.
The steps before NCAT is even relevant
NCAT is a last resort, not a first call. The steps before it matter both practically and legally: a tribunal will look more favourably on an applicant who followed the correct process than on one who went straight to formal proceedings.
The starting point is documentation and written notice. See our mould in rentals guide for the baseline obligations that apply. Key steps in sequence:
- Document the mould: photographs, video, written descriptions with locations and approximate area. See our tenant photo evidence guide for how to build a record that will hold up.
- Send a formal written repair request to the landlord or agent, clearly describing the problem and requesting repair within a reasonable timeframe (typically 14 days for a non-emergency).
- Follow up in writing if the initial notice is ignored. Keep copies of everything.
- Lodge a complaint with NSW Fair Trading if the landlord fails to respond or refuses.
Do not withhold rent in response to a landlord’s failure to repair. In NSW, withholding rent creates a separate breach of your tenancy agreement and significantly weakens your position in any subsequent proceedings.
A related but distinct dispute is over bond money at the end of a tenancy rather than repairs during it. Our guide to mould and bond disputes in NSW covers the specific evidence that carries weight when a landlord tries to claim bond funds for mould-related cleaning or repainting, which overlaps with but isn’t identical to the evidence needed for a repair-order claim at NCAT.
What Fair Trading mediation usually looks like
NSW Fair Trading offers free mediation between tenants and landlords as a conciliation process. A conciliation officer from Fair Trading contacts both parties separately, outlines each side’s position and attempts to facilitate an agreement.
The possible outcomes are:
- A written agreement in which the landlord commits to carrying out specific repairs within a stated timeframe
- No agreement, in which case Fair Trading issues a certificate that allows you to proceed to NCAT
Most landlords with a genuine repair obligation will agree to something at this stage, particularly once they realise the alternative is a tribunal hearing. For landlords who refuse to engage or who agree to repairs but then don’t carry them out within the agreed period, NCAT is the next step.
See NSW Fair Trading, repairs and maintenance for how to lodge the complaint online.
The NCAT application in plain terms
Apply through the NSW Civil and Administrative Tribunal (NCAT) website. You’ll be applying to the Consumer and Commercial Division, Housing List.
There is an application fee, and fee assistance is available for eligible applicants: the NCAT website has the current schedule and the criteria.
Your legal ground is the Residential Tenancies Act 2010, which requires landlords to provide premises in a reasonable state of repair and fit for habitation. Mould that originates from a structural defect (leaking roof, plumbing failure, rising damp, inadequate waterproofing) is a maintenance obligation the landlord cannot lawfully ignore.
NCAT has the power to:
- Order the landlord to carry out specified repairs within a set timeframe
- Award compensation for losses caused by the breach (including damaged belongings, medical expenses and temporary accommodation costs where appropriate)
- Grant a rent reduction for the period the premises were not in a reasonable state of repair, our mould rent reduction NSW guide covers how much is realistic and what evidence supports that specific request
- In serious cases, allow the tenant to terminate the agreement early, our guide to breaking a lease over mould covers the grounds and process, and the financial risks of leaving before that step is formalised
NCAT cannot act as your legal adviser. Bring your evidence bundle and be prepared to present it clearly.
The evidence pack that carries weight
The single biggest variable in a mould dispute at NCAT is the quality of your evidence. Verbal descriptions carry very little weight. Written, dated, photographic and independent evidence carries a great deal.
| Evidence type | Weight at NCAT |
|---|---|
| Independent written mould inspection report | High |
| Dated photographs with location notes | High |
| Copies of written repair requests with timestamps | High |
| Agent or landlord written responses (or lack of response) | High |
| Medical records linking health to the environment (with GP advice) | Medium |
| Receipts for costs incurred (accommodation, medical) | Medium |
| Your own verbal account alone | Low |
| Social media posts or informal messages | Low |
The strongest bundles include all of the first four rows. Build it chronologically and present it in that order.
See our landlord mould checklist for the obligations that the landlord’s position is measured against. Note that an NCAT claim over repairs is a distinct process from a landlord’s own insurance claim; our guide to landlord insurance and tenant-caused mould claims explains why standard landlord insurance rarely covers mould and how that interacts with a tenancy dispute.
Independent mould inspection as evidence
A written mould assessment report from an independent assessor is often the single most persuasive document in a mould dispute at NCAT. It is objective, it comes from a party with no stake in the tenancy, and it records facts that are difficult to dispute: moisture readings, the probable moisture source, extent of affected materials and the probable cause.
A report that establishes a structural moisture source, such as a roof leak, a plumbing defect, or rising damp, is particularly useful because it confirms the mould is not within the tenant’s control and did not arise from poor ventilation habits.
Booking our mould inspection and testing service before the hearing date gives you time to include the report in your evidence bundle and have the assessor available to answer questions if needed. Even if the landlord disputes the findings, an independent report shifts the burden of explanation onto them.
Note that if the mould is in a strata property, the question of whether the source is common property or lot property matters significantly. See our mould in strata apartments guide for that specific context.
When you need a lawyer, not a guide
Some situations go beyond what a self-represented tenant can comfortably manage:
- The landlord has lodged a counter-application against you, alleging a breach of the tenancy agreement
- Your claim involves substantial compensation or termination of the agreement
- You are in social housing or a specialist disability accommodation arrangement with additional regulatory complexity
- You have a prior breach notice on record that could be raised against your claim
- The landlord is legally represented and the claim is complex
In these cases, contact the Tenants’ Union of NSW for free preliminary advice and a referral to a tenant advocate or community legal centre. For complex matters involving significant amounts or legal complexity, a licensed lawyer is appropriate.
Contact us if you need an independent mould inspection report to support your case.
FAQs
How long does an NCAT mould hearing take?
Most Housing List hearings are listed for 30 to 60 minutes at the tribunal. The preparation, including lodging the application, the conciliation step and the hearing date, typically takes several weeks from first lodgement. NCAT publishes current wait times on its website, and these vary by demand.
Can I make an NCAT claim if I’ve already moved out?
Yes, provided you apply within the time limits. Under the Residential Tenancies Act 2010, former tenants can apply to NCAT regarding breaches that occurred during the tenancy. There are time limits, so do not delay if you intend to make a claim after vacating.
What if the landlord carries out the repairs just before the hearing?
If the repairs are completed to a satisfactory standard before the hearing, your grounds for a repair order fall away, but you may still have grounds for compensation or a rent reduction for the period during which the premises were not in a reasonable state of repair. Keep your evidence bundle intact and consider whether compensation is worth pursuing.
Can a mould inspection report be used if it was done after I submitted my application?
Yes. Evidence can be added to your bundle up to a set number of days before the hearing, per NCAT’s procedural rules. Commission the inspection as soon as possible so the report is available in good time. Inform the tribunal that you are adding the report to your bundle and provide a copy to the other party as soon as it is available.
A Note for Public and Community Housing Tenants
Everything above applies to social housing tenants too, since public and community housing tenancies sit under the same Residential Tenancies Act 2010. The main difference is an extra layer before NCAT: most providers, whether that’s DCJ Housing, a registered community housing provider or the Aboriginal Housing Office, have their own internal maintenance and complaints process, plus access to the NSW Ombudsman, that generally needs to be worked through first. Our guide to public and community housing mould repair escalation covers that process in detail and where an independent inspection fits in.
Related reading
- Mould in rental properties NSW
- Tenant photo evidence guide for mould disputes
- Landlord mould obligations checklist
- Mould in share houses and student rentals
- Vacate cleans and mould disputes at end of lease
- Mould assessment report explained
- Breaking a lease over mould in NSW
- Mould in strata apartments NSW
- Mould rent reduction in NSW: how much and how to ask
- Mould inspection and testing service