Restore safety. Stop contamination. 24/7 across Sydney & NSW

Mould, Flood and Biohazard Remediation in Sydney. Get help now.

Professional remediation for mould, flooding, biohazards, trauma, hoarding and fire damage. On-Guard responds calmly, discreetly and with a clear plan to make the property safe again.

24/7 phone line for emergencies

Request prompt assistance

Tell us what has happened and the best way to reach you. A member of the On-Guard team will assess the situation and explain the next step.

Your Name

Phone Number

Email Address

Property postcode

What Help do you need

Briefly describe the situation

Your details are treated privately. For an immediate emergency response, call 1800 664 827.

24/7 Response

Urgent help across NSW

Certified Processes

Safety-led remediation

Homes to Facilities

Residential, strata & commercial

Clear Reporting

Insurance support available

Specialist remediation, not surface cleaning

Removing what you can see is not the same as removing the risk

Contamination may sit inside porous materials, wall cavities, flooring and the air. The On-Guard method identifies the source, contains the affected zone and treats the environment as a complete system.

Basic clean-up

Wipe it down and hope

Where shortcuts create risk

The On-Guard method

Assess, contain and remediate

A process designed around safety

Remediation services

One team for urgent and complex property hazards

From an isolated mould concern to a high-risk biohazard event, the response is matched to the contamination, property and people affected.

Mould remediationEmergency water damageSewage clean-upBiohazard remediationTrauma cleaningHoarding clear-outsFire & smoke remediationSharps removalRisk mitigation

Measured rather than guessed

Equipment and treatment are selected around the actual risk.

Science-led remediation

The right equipment matters when contamination is hidden

On-Guard uses moisture and contamination checks, containment systems, HEPA filtration, specialised antimicrobial treatment and structural drying to manage what ordinary cleaning may leave behind.

HEPA filtration

Controls fine airborne particles.

DF200 treatment

Specialised antimicrobial remediation.

Structural drying

Targets trapped moisture in materials.

Independent testing

Clearance available where required.

Your first appointment

A clear process when the situation feels overwhelming

You receive practical guidance, a defined remediation plan and updates throughout the job.

Tell us what happened

Share the incident, timing, property details and any photos or videos available.

Inspect where required

Mould, flood and biohazard concerns may need on-site readings or contamination checks.

Assess and plan

The source, affected materials and risk level determine the remediation method.

Contain and remediate

Specialised treatment, removal, extraction or drying is completed safely.

Verify and report

Final checks and documentation are provided, with independent clearance where needed.

Every property needs a different response

Remediation for homes, strata, businesses and essential facilities

The plan accounts for building layout, occupancy, contamination type, compliance needs and the urgency of reopening the space.

Homes & Units

Careful remediation with clear guidance for residents and families.

Strata & Property

Containment, reporting and coordination for owners and managers.

Commercial Sites

Fast, staged work designed to reduce disruption and downtime.

Health & Government

Structured processes for sensitive, regulated and high-use facilities.

Trusted during difficult situations

Clients remember the care as much as the clean-up

    
 
 
       Posted on Google  
   
   Phil Gale 
 
 
 
 Trustindex verifies that the original source of the review is Google. I recently hired mark for mold remediation work at my home, and I couldn't be more satisfied with the service. From the initial consultation to the final inspection, mark was professional, knowledgeable, and extremely reliable. He arrived on time, explained the work clearly, and made sure everything was up to code.
  
 
      Posted on Google  
   
   Simmeone Hanlen 
 
 
 
 Trustindex verifies that the original source of the review is Google. Cannot recommend Mark highly enough. He was patient, caring and understanding with such a sensitive matter. He and his team did an outstanding job and we were all so thrilled with the results as they exceeded our expectations.
  
 
      Posted on Google  
   
   Charbel Elhage 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great and very reliable team you honestly will not find better and explains in ENGLISH exactly the issues and what needs done to fix it . Thanks to mark and the team job well done 🙏
  
 
      Posted on Google  
   
   Trent Shah 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mark and the team are incredible at what they do. They are reliable, thorough, and take real pride in their work. You can tell he genuinely cares about providing the best possible service and making sure everything is done properly. If you’re looking for someone you can count on to get the job done right, Mark and On-Guard Sanitisation are the ones to call. Highly recommend!
  
 
      Posted on Google  
   
   Joseph Halavazis 
 
 
 
 Trustindex verifies that the original source of the review is Google. I highly recommend the services of On-Guard Sanitisation. They are very reliable, empathetic, fairly priced and show dedication to their clients.
  
 
      Posted on Google  
   
   Andrew G 
 
 
 
 Trustindex verifies that the original source of the review is Google. Highly recommend On-Guard's services. I have utilised their services for clients on multiple occasions and have consistently been impressed with their professionalism, quality of work and cost. Thank you guys!
  
 
      Posted on Google  
   
   Susan Conolly 
 
 
 
 Trustindex verifies that the original source of the review is Google. On-guard sanitation provided a service for the retirement village where I work. Mark was prompt, professional, very effective and kind and friendly to boot! I would definitely recommend their help on what is probably your worst day.
  
 
      Posted on Google  
   
   Albert Nasralla 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mark has carried out lots of odd jobs for me both in the building and biohazard industries. I would not hesitate in hiring Mark again as he is polite, respectful and goes above and beyond every single time. Thank you Mark and On-guard Team!!
  
 
      Posted on Google  
   
   Swati Mitra 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mark and his team were extremely thorough and professional in conducting testing and remediation work.  I would highly recommend them for anyone experiencing mould related issues.    Mark was also kind enough to provide additional guidance on mitigating future issues.
  
 
      Posted on Google  
   
   MARYANNE day 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mark and his team did an excellent job. They were very thorough. I would highly recommend them for any job that needs specialist cleaning.

Every property needs a different response

Remediation for homes, strata, businesses and essential facilities

On-Guard supports homeowners, property managers, businesses, insurers and community organisations across Sydney and New South Wales.

Sydney CBDInner WestEastern SuburbsSutherland ShireNorth ShoreNorthern BeachesWestern SydneySouth-West SydneyRegional NSW

Before the team arrives

Common remediation questions

What should I do during an urgent biohazard, sewage or flooding event?

Avoid entering or disturbing the affected area, keep other people and pets away and call the 24/7 line. The team may provide immediate safety instructions and explain whether emergency attendance is required.

Do you need to inspect the property before providing a quote?

Some jobs may be assessed from the details and images supplied. Mould, flooding and complex contamination often require an on-site inspection, moisture readings or additional testing before the correct scope may be confirmed.

Do you work with insurance companies and property managers?

Yes. On-Guard regularly coordinates with owners, strata managers, insurers, assessors and builders. Detailed scopes, moisture logs and remediation reporting may be provided where required.

May occupants remain at the property during remediation?

This depends on the hazard, affected area and containment plan. Partial occupancy may be possible in some situations, while heavy sewage, fire, mould or biohazard contamination may make temporary relocation safer.

Is independent testing available after the work?

Yes. Independent hygienist or laboratory testing may be arranged where clearance is requested by the owner, insurer, property manager or another stakeholder.

Do not wait for contamination or moisture to spread

Speak with the On-Guard team now for immediate guidance or request a clear remediation plan for a non-urgent concern.

Mould, Flood and Biohazard Remediation in Sydney. Get help now.

Request prompt assistance

Removing what you can see is not the same as removing the risk

Wipe it down and hope

Assess, contain and remediate

One team for urgent and complex property hazards

Mould Remediation Sydney

Water Damage & Flood Restoration

Biohazard Cleaning & Decontamination

Forensic & Trauma Cleaning

Hoarding & Deceased Estate Cleaning

Fire, Smoke & Odour Damage Restoration

The right equipment matters when contamination is hidden

A clear process when the situation feels overwhelming

Tell us what happened

Inspect where required

Assess and plan

Contain and remediate

Verify and report

Remediation for homes, strata, businesses and essential facilities

Clients remember the care as much as the clean-up

Remediation for homes, strata, businesses and essential facilities

Common remediation questions

Do not wait for contamination or moisture to spread