Mould disputes often become arguments about cleaning before anyone identifies why moisture is present. Queensland law makes cause important. A leak, water entry, structural dampness or inadequate property ventilation points to a different responsibility from mould caused by a tenant's actions.
In this guide 10 sections
Quick answer: notify the property manager or owner as soon as you discover mould. Record where it is, when it appeared, moisture or leaks, ventilation and how it changes. Responsibility depends on cause. Request both removal and repair of the source where the property is responsible.
General information only: This guide is not legal, medical, building, mould-remediation or tenancy advice. Health risks, major contamination, disasters, body corporate property, rooming accommodation and moveable dwellings may require different help. If anyone is in immediate danger, contact the appropriate emergency service.
Who is responsible for mould?
The RTA says responsibility depends on how the mould appeared. If it results from problems with the property, such as a leaking roof or leaking pipework, the property manager or owner is responsible for addressing the mould and making necessary repairs. If a tenant caused it, for example by allowing steam to build up without proper ventilation or regular cleaning, the tenant may be responsible for cleaning and resulting damage.
| Observed factor | What it may indicate | Evidence to collect |
|---|---|---|
| Water marks after rain, roof or window leak | Property weatherproofing or repair issue | Rain dates, wider photos, water path, prior repair reports |
| Damp wall, pipe leak or plumbing failure | Property repair issue | Leak location, moisture changes, plumber or tradesperson findings |
| No functional exhaust fan or inadequate built-in ventilation | Property feature may contribute | Photos, operation test, room layout, prior requests |
| Steam or condensation with working ventilation not used | Tenant actions may contribute | Ventilation habits, fan operation, window access |
| Mould present at move-in | Pre-existing condition and possible standards issue | Form 1a, move-in photos, first written report |
| Recurring mould after cleaning | Underlying moisture source may remain | Before and after dates, repeated locations, repair history |
The table is an evidence guide, not a technical diagnosis. More than one factor can contribute. Avoid accepting or assigning responsibility based only on a photograph if the moisture source has not been investigated.
Mould and Queensland minimum housing standards
Queensland minimum housing standards require rental premises to be free from damp and mould unless the issue was caused by the tenant. The standards apply when the tenant moves in and throughout the tenancy. The owner also has broader duties to keep the premises fit to live in, in good repair and compliant with relevant health and safety laws.
During a tenancy, repairs needed to make the property comply with minimum housing standards are classified as emergency repairs. That does not mean every small cleaning task is automatically an emergency repair. Identify the defect or moisture source and follow the emergency process where repair is required to restore compliance.
If the mould was caused by the tenant's actions, the minimum-standard exception matters. The tenant should still communicate and act promptly to prevent further damage.
Report the mould so the cause can be investigated
The RTA says the tenant should notify the property manager or owner as soon as they become aware of mould. A useful report asks for investigation and a repair plan, not only a surface clean.
- Property address, room and exact location.
- Date first noticed and whether it followed rain, a leak or high humidity.
- Approximate area and any spreading, staining, odour or damaged materials.
- Whether windows, fans or vents are present and working.
- Any water entry, plumbing fault, condensation or prior repair.
- Dated wide and close-up photographs, taken without disturbing the mould.
- The effect on use of the room or belongings.
- A request for investigation, source repair, safe treatment and a written timeframe.
Suggested wording: “I am reporting mould at [location], first noticed on [date]. It appeared after [observable event], and I have also observed [leak, dampness or ventilation issue]. Photos are attached. Please confirm how the cause will be investigated, what repair or treatment is proposed, and the attendance timeframe.”
If the mould or moisture source is not fixed
- Follow up with the evidence attached. State what has changed and ask for a dated plan.
- Use the correct emergency contact process where minimum-standard repairs are required. Check the tenancy agreement and the RTA emergency repair rules before arranging any work.
- Consider Form 11. A tenant may issue Notice to remedy breach, Form 11, if they believe the owner or manager has not met an obligation. A general tenancy notice must allow at least seven days.
- Request RTA dispute resolution. For non-urgent disputes, Form 16 or the online service can be used after attempts at self-resolution.
- Consider a repair order. QCAT can make repair orders for routine or emergency repairs. Emergency repair and some minimum housing standard applications can be urgent; routine repair applications generally require RTA conciliation first.
Do not stop paying rent or deduct a self-selected amount. A rent reduction may be negotiated in writing or ordered in an appropriate case, but unpaid rent can create a separate breach.
Practical tool: the mould evidence timeline
| Date and weather | Location and change | Moisture clue | Action and response |
|---|---|---|---|
| First sighting | Room, wall, ceiling or item, plus approximate size | Rain, leak, condensation, pipework or unknown | Report sent, attachments listed |
| Each recurrence | Same area or new area, larger or smaller | What happened before it returned | Cleaning, inspection or repair completed |
| Trade attendance | Areas inspected | Findings stated by the tradesperson | Work proposed, parts, next date |
| Formal notice | Condition at service date | Unresolved source | Form 11 delivery and remedy date |
| Escalation | Current condition and room use | Evidence summary | RTA or QCAT reference and outcome |
Keep originals of photographs, messages, reports, invoices and any damaged-item evidence. A consistent timeline is more useful than repeatedly starting a new message thread.
Protect health without making unsupported claims
Do not disturb extensive mould, enter an unsafe area or mix cleaning products. If a person has symptoms or a health condition that may be affected, seek advice from an appropriate health professional. A clinician can address health questions, while a suitably qualified building or remediation professional can investigate the property condition.
Record what you observe and any professional advice you actually receive. Do not diagnose a building or medical cause yourself. If a report will be relied on in a dispute, preserve the complete document and the author's qualifications.
Can mould justify ending the tenancy?
Mould does not automatically cancel a fixed-term agreement. The correct path depends on when the issue arose, its cause and severity, what notices or orders exist, and whether the legal ground is established.
| Path | When it may apply | Important qualification |
|---|---|---|
| Condition of premises in first 7 days | The tenant gives Form 13 within the first 7 days of occupation because the property is unfit, not in good repair, unsafe under relevant law, or below minimum standards | At least 14 days' notice applies and the ground cannot rely on circumstances caused by the tenant |
| Unremedied breach | A valid Form 11 breach remains unremedied after its remedy period | Form 13 generally gives 7 days, but the RTA warns this does not guarantee release from a fixed-term agreement |
| Failure to comply with repair order | A QCAT repair order has not been complied with | Form 13 generally gives 14 days for a general tenancy |
| Non-liveability | The property is destroyed or made completely or partly unfit to live in, other than because of a breach of the agreement | Notice must be given within 1 month of the event; mould alone does not prove this ground |
| Mutual written agreement | Both parties agree to an end date and terms | Record the date, rent, bond, compensation and handover terms clearly |
| QCAT termination order | A statutory ground supports an application, such as repeated breaches or excessive hardship | The tenant should not assume the agreement ends before an order is made |
Choosing the wrong ground can expose a tenant to a compensation claim. Before giving notice, check the latest Form 13, notice calculation rules and evidence. For a severe personal situation, the TenantTools Queensland excessive hardship guide explains the separate QCAT pathway.
Six mistakes to avoid
- Cleaning before documenting. Record the original condition and moisture clues safely.
- Reporting only “mould”. Include location, dates, changes and possible property defects.
- Requesting surface cleaning only. Ask for investigation and repair of the source.
- Assuming responsibility without evidence. Cause may require technical assessment.
- Stopping rent or arranging routine work without authority. Use the formal process instead.
- Moving out without a valid ending path. Mould severity does not replace the required ground, form, notice or order.
Frequently asked questions
Who is responsible for mould in a Queensland rental?
Responsibility depends on the cause. The owner or manager is generally responsible where mould results from property defects such as a leaking roof, pipe leak, structural dampness or inadequate property ventilation. A tenant may be responsible where their actions caused the mould.
Is mould covered by Queensland minimum housing standards?
Yes. Rental premises must be free from damp and mould unless it was caused by the tenant. The standards apply when the tenant moves in and throughout the tenancy.
Is every mould problem an emergency repair?
Repairs needed to make a property comply with minimum housing standards are classified as emergency repairs. The cause, required work and facts still matter, so do not assume that every cleaning task follows the emergency repair process.
Can a tenant issue Form 11 for mould?
A tenant may issue Form 11 where they believe the owner or manager has failed to meet an obligation. A general tenancy breach notice must allow at least seven days to remedy the breach.
Can a tenant stop paying rent because of mould?
No. The RTA says tenants should not stop paying rent because repairs are unresolved. A tenant can negotiate a written rent reduction or seek appropriate orders, but should not create their own deduction.
Does mould automatically let a tenant end a fixed-term lease?
No. Different grounds and processes may apply, including condition of premises in the first seven days, unremedied breach, failure to comply with a repair order, non-liveability, mutual agreement or a QCAT termination order. The correct ground depends on the evidence.
The bottom line
Treat mould as a condition-and-cause problem. Report it quickly, build a dated record, request investigation and source repair, then use the repair and dispute pathway that matches the facts. Check the legal ground carefully before taking any step to end the tenancy.
Need the broader repair process?
Read the Queensland rental repairs guideGeneral information only: This article is not legal, medical, building, mould-remediation or tenancy advice. Laws, forms and procedures can change. Check the current Act and RTA guidance, and obtain advice for your circumstances. Last reviewed 7 September 2026.