Mould in buildings is linked to respiratory illness, chronic inflammation, fatigue, asthma aggravation and immune system stress.

Mould is not just a maintenance issue.

In workplaces, schools, retail spaces and rental properties, unresolved mould can result in:

It is a Class 2 Biohazard and a legal liability.

If mould is visible, the problem is already established. If it is hidden, it may be spreading.

• Staff illness and absenteeism

• Tenant complaints and disputes

• Reputational damage

• Breach of Healthy Homes or workplace safety obligations

• Insurance complications

• Expensive reactive repairs if left untreated

Mould is not cosmetic. It is a biological hazard that requires certified specialist assessment, containment, and remediation. Cleaning it does not resolve it

Our Services

Mould is a specialist discipline. It is not standard cleaning, general building maintenance, or a job for any contractor without specific training and certification.

Healthy Property Limited holds dual certification across mould testing and remediation, and our services cover the full pipeline from initial assessment through to independently certified safe occupancy.

1. Air and surface sampling by an IANZ-accredited laboratory, identifying contamination including what is hidden inside wall cavities, ceiling voids, and subfloor spaces where no visible mould exists

2. Moisture mapping using thermal imaging and non-invasive moisture meters to locate the source of moisture driving the contamination

3. IICRC S520-compliant specialist remediation carried out directly by our team: containment zones, negative pressure, HEPA filtration, and full PPE protocols. We do not subcontract remediation

4. Post-remediation clearance testing and Safe Occupancy certification signed off by a certified specialist.

Independently verified, legally defensible, and accepted by the Tenancy Tribunal and WorkSafe NZ

Mould Assessment and Testing

Independent mould assessment for residential properties, rental homes, and owner-occupied homes. We go well beyond a visual inspection. 80% of our callouts detect contamination inside wall cavities and ceiling voids where no visible mould exists. You cannot manage what you cannot measure

Air and surface sampling analysed by an IANZ-accredited laboratory, producing legally defensible results
Moisture mapping using thermal imaging and non-invasive moisture meters to locate the source, not just the symptom
Identification of mould species including toxigenic, pathogenic, and allergenic types and their health risk classification
Written Assessment Report with findings, species identification, contamination extent, and a clear remediation scope where required
Safe Occupancy certification following successful post-remediation clearance, signed off by a qualified civil engineer

Commercial, Government and Institutional

Healthy Property Limited works with commercial building owners, asset managers, government agencies, schools, social housing providers, tourism operators, and iwi organisations. For organisations responsible for multiple buildings and the people inside them, mould is not just a maintenance issue. It is a foreseeable health and safety hazard under the Health and Safety at Work Act 2015, with legal obligations to identify, assess, control, and verify. We provide the independent specialist expertise to meet all four of those obligations

Independent mould assessment and laboratory testing across single sites or full building portfolios
Pre-works assessment before any planned maintenance or renovation to protect tradespeople and prevent uncontrolled contamination events
IICRC S520-compliant specialist remediation carried out directly by our team, not subcontracted
Safe Occupancy certification issued by a qualified civil engineer: legally defensible documentation for WorkSafe NZ, MBIE, and the Tenancy Tribunal
Annual monitoring programmes with portfolio-level reporting for property managers and government clients
Nationwide coverage across both the North and South Islands

Safe Occupancy Certification

Remediation is not complete when the work is finished. It is complete when independent testing confirms the contamination is gone. This step is the most consistently skipped in New Zealand and it is the reason mould returns, occupants remain unwell, and Tenancy Tribunal cases arise.

We carry out post-remediation air and surface sampling analysed by an IANZ-accredited laboratory, compared against pre-established clearance criteria. Where results meet the clearance standard, we issue a formal Safe Occupancy Certificate signed off by a qualified civil engineer. This certificate is independently verified, legally defensible, and accepted by the Tenancy Tribunal, WorkSafe NZ, and MBIE.

Remediation without verification is an assumption. We provide the proof.

Specialist Remediation

Mould contamination classified as Toxic, Pathogenic, or Allergenic cannot be safely removed by untrained cleaners or general tradespeople. Species such as Stachybotrys chartarum and Aspergillus, both commonly found in New Zealand buildings, require specialist containment methodology to prevent cross-contamination to surrounding areas.

When mould is disturbed without proper containment it triggers sporulation: a concentrated burst of spores released instantly into the air, spreading through ventilation systems and contaminating spaces that were previously unaffected. This is the single most common way a manageable problem becomes a significant and costly one.

Healthy Property carries out all remediation directly using IICRC S520-compliant methodology: sealed containment zones, negative pressure engineering, HEPA filtration, full PPE, and biocidal treatment. We do not subcontract this work. Every remediation engagement is followed by independent post-remediation clearance testing before the space is returned to occupants.

Under the Health and Safety at Work Act 2015, property owners, landlords, and employers have a legal duty to identify and control foreseeable biological hazards in their buildings. We provide the documented, independently verified outcomes that meet that obligation

Our Focus

Mould is our sole focus. Not general building maintenance. Not cleaning. What we do is specific: specialist mould inspection, air and surface testing, laboratory analysis, decontamination, remediation, and Safe Occupancy certification. Every part of that pipeline is carried out by our own specialist team, in-house, from the first site visit to the engineer-signed clearance certificate. Our methodology, our equipment, our laboratory partnerships, and our reporting standards are built entirely around this one discipline. That depth of specialisation is what separates a verified outcome from an assumption

Inspection, Assessment & Testing

Independent mould assessment and specialist remediation for homeowners, landlords, and tenants. Whether you are dealing with a visible mould problem or want assurance that your home is safe, we provide laboratory-backed assessment and engineer-certified clearance

Commercial & Government

We work with commercial building owners, government agencies, schools, social housing providers, and iwi organisations. For any organisation with a legal duty of care under HSWA, we provide the documented, independently verified outcomes that demonstrate compliance

Safe Occupancy Certification

Post-remediation clearance testing by an IANZ-accredited laboratory, with Safe Occupancy certificates signed off by a qualified civil engineer. Accepted by the Tenancy Tribunal, WorkSafe NZ, and MBIE. Remediation without verification is an assumption.

We provide the proof

Ongoing Monitoring

Annual assessment programmes for property managers and portfolio owners. We establish a baseline in year one and monitor annually, catching deteriorating conditions early when remediation scope is small and cost is low.

Portfolio reporting included.