Mould disputes in Wollongong rentals often start the same way: a tenant spots dark patches on a bathroom ceiling or behind a wardrobe, notifies the landlord or property manager, and then waits. And waits. The Illawarra’s coastal humidity and heavy Escarpment rainfall mean mould is one of the most common complaints handled by local property managers, which also means some landlords have learned to manage the paperwork rather than the problem. If your landlord has stalled, dismissed the issue, or offered a half-hearted clean that failed within weeks, this guide explains how to escalate effectively. See also our guide on tenant photo evidence for mould disputes.
Quick Answer (BLUF)
If your landlord has failed to address mould after a written request, you can lodge a formal complaint with NSW Fair Trading and request a conciliation session. If conciliation fails, apply to NCAT for a repair order, rent reduction, or compensation. In urgent situations where mould poses a health risk, you may be entitled to terminate the tenancy without penalty under the 2020 NSW tenancy reforms.
Step 1, Document Everything First
Before you escalate anywhere, your evidence base needs to be solid. Inspectors, conciliators, and tribunal members all work from what you can prove.
What to gather:
- Dated photographs showing the extent and location of mould, take them under natural light or with a flash
- Copies of all written communications with the landlord or agent (emails, text messages, condition reports)
- Any medical records linking symptoms to the property (GP letters are valuable)
- A written timeline showing when you first reported the issue and how the landlord responded
- If you have paid for dehumidifiers, cleaning products, or any interim fixes, keep receipts
Wollongong properties in older suburbs like Fairy Meadow, Corrimal, and Thirroul often have structural issues, poor subfloor ventilation, ageing fibro or brick-veneer construction, inadequate bathroom exhaust, that cause recurring mould. Document whether mould returned after any prior treatment, as this supports a structural rather than lifestyle cause.
Step 2, Formal Written Notice to the Landlord
Send a letter (email is fine, but keep a record) that:
- Describes the mould in specific terms, rooms affected, approximate area, any health impacts
- References the landlord’s duty to provide and maintain a property in a reasonable state of repair under the Residential Tenancies Act 2010 (NSW)
- Gives a clear deadline, 14 days is reasonable for non-urgent repairs; 24-48 hours if the mould is extensive or a household member has respiratory illness
- States that if no action is taken, you will lodge a complaint with NSW Fair Trading
Keep your tone factual. Avoid threats about withholding rent, this can complicate your NCAT application.
Step 3, Lodge with NSW Fair Trading
If the deadline passes without meaningful action, go to nsw.gov.au/housing-and-construction/renting and lodge a complaint online. Fair Trading will contact the landlord and attempt a conciliation, a free, informal mediation session.
Conciliation resolves a significant proportion of tenancy disputes without the need for tribunal. The landlord may agree to arrange professional mould remediation and a mould inspection to confirm clearance. Get any agreement in writing and with a completion date attached.
When conciliation is unlikely to work:
- The landlord disputes that mould exists or claims it is caused entirely by tenant behaviour
- There is a history of failed repairs at the property
- The landlord is an investment property owner who is slow to respond and not locally based
In these cases, move directly to NCAT.
Step 4, Apply to NCAT
The NSW Civil and Administrative Tribunal handles tenancy disputes under the Residential Tenancies Act 2010. Filing a tenancy application costs $53.00 for most tenants (as at 2025). You can apply for:
- A repair order, compelling the landlord to carry out specific works within a set timeframe
- A rent reduction, compensation for the period the property was not up to standard
- Termination without penalty, if the property is unfit for habitation or a serious breach of the agreement has occurred
For mould-related claims, the most commonly sought orders are repair orders combined with rent reductions. The 2020 amendments to the Residential Tenancies Act strengthened the concept of “fit for habitation,” which has made it easier to argue that extensive untreated mould meets this threshold.
Preparing your NCAT application:
- Attach all photographs, correspondence, and your written timeline
- If you can obtain an independent mould inspection report from a qualified assessor, this carries significant weight
- Note any health impacts, particularly for children, elderly residents, or anyone with asthma, allergies, or immune conditions, common in the Illawarra where humidity worsens respiratory symptoms
Step 5, What Happens at the Hearing
Most tenancy hearings at NCAT are relatively informal. A tribunal member will hear from both parties and examine the evidence. The hearing usually takes 30-90 minutes. You do not need a lawyer, but you may bring a support person.
If a repair order is granted, the landlord is given a deadline, typically 28-60 days. Failure to comply can lead to contempt findings and further orders. If a rent reduction is ordered, this is usually calculated as a percentage of rent for the period the property was affected.
When to Consider Vacating
Under the Residential Tenancies Act 2010 s.36 and s.106, a tenant may terminate a fixed-term or periodic tenancy without penalty if the landlord has failed to comply with a material term of the agreement, including the duty to maintain the property. If mould has made the property genuinely unsafe (confirmed by a professional report or medical evidence), this path may be available to you. Get legal advice from Wollongong Community Legal Centre before taking this step.
FAQs
Can I withhold rent because of mould in my Wollongong rental?
Withholding rent is not recommended and can expose you to termination proceedings by the landlord. The correct approach is to continue paying rent while pursuing a rent reduction order through NCAT. If granted, the reduction is backdated to the date of the application.
How long does a Fair Trading conciliation take?
Most conciliation sessions are scheduled within 2-4 weeks of the complaint being lodged. The session itself usually takes less than an hour. If no agreement is reached, you can proceed immediately to NCAT.
Does mould have to be professionally tested to make an NCAT claim?
No, NCAT does not require scientific testing for a repair order. Photographs and written evidence of a landlord’s failure to act are often sufficient. However, a professional inspection report from a qualified mould assessor significantly strengthens your case, particularly if the landlord argues the mould is minor or lifestyle-related.
What if the landlord says the mould is my fault?
Landlords frequently argue that tenant behaviour, inadequate ventilation, leaving wet towels on floors, caused the mould. If the property has structural issues (no bathroom exhaust fan, poor subfloor ventilation, rising damp) you can counter this with an inspection report. An experienced NCAT member will look at the whole picture, including the property’s condition and history.