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Rental Property Mould Inspections in Sydney

Mould in a rental property usually comes down to one question: is it the building or the way the home is being lived in? We measure the moisture, find the cause and put it in a clear, independent report that landlords, property managers, tenants and, if it comes to it, NCAT can rely on.

Quick answer: in NSW, a landlord must fix mould caused by a building problem, such as a leak, a defect that wasn't repaired in reasonable time, or inadequate ventilation. A tenant may be responsible if they caused the moisture build-up, for example by never opening windows or not using the bathroom fan. Our inspection measures moisture, humidity and surface temperatures to show which it is. The inspection and quote are free; a professional mould and moisture report starts from $500 + GST.

Who We Work With

Landlords, Tenants, Agents and Strata

  • Landlords and property managers – a clear answer on the cause before you spend money, a scope of works if repairs are needed, and photos and readings for your records.

  • Tenants – you can book us directly. You get an independent record of the mould, the moisture and the likely cause to support a repair request.

  • Strata managers and committees – working out whether the water is coming from common property or a lot, and what needs fixing first.

  • Lawyers and NCAT matters – reports prepared to meet NCAT's expert evidence requirements, for tenancy and building disputes (quoted per job). Michael Nguyen has attended NCAT as an expert witness.

We work right across Sydney for landlords, tenants and agents, including agencies such as Ray White, LJ Hooker and Raine & Horne.

What the NSW Rules Say

The NSW Fair Trading position, in plain terms:

Landlord: must fix mould that results from a defect not repaired within a reasonable time, or from inadequate ventilation. "Adequate ventilation" and "structurally sound" are two of the seven minimum standards a rental must meet. Noting mould on the condition report does not remove the landlord's duty to keep the property in reasonable repair, and mould linked to an unsafe fault can be an urgent repair.

Tenant: may be responsible if they caused the moisture build-up, and must tell the landlord or agent as soon as possible when they notice mould or damp.

Disputes: NSW Fair Trading (13 32 20) can help with a complaint; unresolved tenancy disputes go to NCAT.

We are mould and moisture professionals, not lawyers. Our job is to give you the facts about the building; for legal advice, talk to a solicitor or the Tenants' Union.

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Building Problem or Condensation? How We Tell

  1. Moisture mapping: moisture meters and thermal imaging on walls, ceilings and floors. A wet wall next to a shower or under a roof points to a leak; dry walls with surface mould point to condensation.

  2. Air readings: temperature, relative humidity and dew point in each room, compared with the surface temperatures where the mould is growing.

  3. Ventilation check: exhaust fans (and where they vent to), windows, wall vents and subfloor ventilation.

  4. Sampling where needed: air or surface samples analysed by a NATA-accredited laboratory, with an outdoor control sample.

  5. Report: photos, readings, the likely cause, the IICRC S520 condition of each area, and what needs to happen to fix it. Usually ready within 5 days of the inspection.

What It Costs

  • Mould inspection and quote: free

  • Professional mould and moisture report (landlord, agent, tenant, insurance): from $500 + GST

  • Air or surface sampling with NATA-accredited lab analysis: quoted per job

  • Reports for NCAT or legal matters: quoted per job

If remediation is needed, we quote it separately, and we can carry out the repairs as NSW licensed builders (392154C).

Real Examples of Finding the Cause

  • Macquarie Park: chronic mould that looked like a leak but turned out to be condensation.

  • Wollstonecraft high-rise: a roof leak in a strata building; the readings ruled out condensation and pointed to the leak.

  • Parramatta: an ensuite leak sending water into the linen cupboard next door.

  • Ashfield strata: mould remediation in a heritage apartment building.

Rental Mould FAQs

Who pays for mould removal in a rental in NSW?

It depends on the cause. Mould from a leak, a defect or inadequate ventilation is generally the landlord's to fix; mould from moisture the tenant created may be the tenant's. An inspection with moisture readings shows which.

Can a tenant book their own mould inspection?

Yes. We give tenants the same independent report we would give a landlord: photos, readings and the likely cause.

Is your report independent?

Yes. The report states what the readings show, whoever is paying. If remediation is needed later, clearance testing is done by an independent assessor, not by us.

Do you write reports for NCAT?

Yes. Our NCAT reports are prepared to meet the Tribunal's expert evidence requirements, and Michael Nguyen has attended NCAT as an expert witness. NCAT and legal reports are quoted per job.

How quickly can you inspect?

We inspect right across Sydney, and your written report is usually ready within 5 days of the inspection. Call 1300 739 783.

Mould in a rental property? Book an inspection and get a clear answer on the cause. Call 1300 739 783 or book online.

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