James AllenI started noticing a weird smell in my basement; it wasn’t strong, just off. I thought it was old boxes or damp air. But during a big cleanup, I spotted black mould growing in the cracks.
I panicked a bit. Mould spores can mess with your health fast, so I called a removal crew right away. Luckily, they showed up within hours and cleared it all out clearly.
Since mould can sneak up on anyone, I’m sharing the best mould removal companies in Toronto you can trust.
And because damp is usually the cause, I’ve also listed the best basement waterproofing services in Toronto to help stop the problem before it starts.
How much does mould removal cost in Toronto?
Mould removal costs in Toronto vary quite a bit depending on the size of the problem and where it’s located. On average, you’ll pay around $3.80 per square foot, though costs can climb higher if special safety gear or deeper cleanup are needed.
How We Chose
1. Mold Removal Remediation
Services offered: Mold Inspection, Air Quality Testing, Mold Removal, Mold Remediation, Asbestos Testing, Sanitization & Disinfecting, Water Damage Restoration
Address: 3973 Chesswood Drive, Toronto, ON, M3J 2R8
Phone number: (647) 889-7967
Business hours: 9:00 am – 5:00 pm
Mold Removal Remediation positions itself as a certified and locally trusted mold removal specialist serving Toronto and the GTA. The company focuses on delivering fast, safe, and structured remediation services for both residential and commercial properties. With over 10 years of experience, they emphasize health-focused mold solutions backed by industry certifications.
Their core strength is their mold removal service, which uses a full containment approach to safely eliminate mold without spreading spores to unaffected areas. They rely on HEPA filtration systems and certified cleaning procedures to ensure contamination is properly handled during removal.
Before removal begins, the company performs detailed mold inspections using advanced tools like thermal imaging to detect hidden moisture and mold growth. This step is crucial for identifying issues behind walls, ceilings, and other hard-to-reach areas where mold often develops unnoticed.
They also place strong emphasis on accurate identification of mold type and source, which helps prevent recurring issues after treatment. By addressing the root cause rather than just surface-level contamination, their remediation process aims to deliver longer-lasting results.
Once removal is completed, the service includes thorough cleaning and sanitization of affected areas using professional-grade disinfecting methods. This ensures that remaining spores, allergens, and potential contaminants are reduced as much as possible for improved indoor air quality.
In addition to mold removal, they offer complementary services such as air quality testing and asbestos testing, which help assess overall environmental safety in the property. These services support a more complete remediation process, especially in older buildings or heavily affected spaces.
Overall, their approach is structured, certification-driven, and focused on safety and prevention. The combination of inspection, removal, and sanitization makes their service suitable for clients dealing with both minor and severe mold problems.
2. Paul Davis
Services offered: Mould inspections, black mould remediation, sanitisation of affected items, wall and flooring replacement, and more
Address: 108 Milvan Dr, North York
Phone number: +1 905-856-5737
Business hours: Available 24/7
Paul Davis is a decent option if you need round-the-clock help with mould problems. They have more than 40 years of experience and a 24/7 support line, so someone is always ready to pick up when you call.
I like that they can be on-site within hours because mould spreads fast, and waiting around can make things worse. Their approach is thorough, too.
When it comes to black mould remediation, they go beyond surface cleaning by replacing damaged flooring or walls, applying fresh caulk, and even sanitising clothes that were affected.
Another plus is that they document everything carefully, which makes insurance claims smoother and less stressful.
That said, there are some downsides. Pricing isn’t always clear in emergencies, so some clients have been caught off guard by the final bill. They also sometimes miss appointments, which can be frustrating.
They made a stressful situation as pleasant as possible
“The Paul Davis company, crew and sub-contractors, were outstanding! They made a stressful situation as pleasant as possible. We would 💯 recommend Paul Davis & Co to anyone that needs a service like this! Thank you Dixit, Huzaifa, Mike and everyone that helped out xo”
-Robin Schaufler, Google Reviews
The Paul Davis team was absolutely amazing!
“The Paul Davis team was absolutely amazing! Huzaifa Abid was first on the scene and was here so quickly. He inspected everything and communicated his thoughts and the entire process in an assuring, easy-to-understand manner. The clean-up crew were plentiful, professional with such a pleasant demeanor. The whole team has put our minds at ease and we feel taken care of and we would not hesitate to recommend their service to anyone and everyone.”
-EG Design Works, Google Reviews
3. Mold Assist
Services offered: Mould removal, inspection, testing, remediation, and air quality testing
Phone number: +1 866-916-4677
Business hours: Available 24/7
In my frantic search for a company to help with my mould problem, I found Mold Assist. Thankfully, their office is open 24/7, and a representative responded even though I called at five in the morning.
What really surprised me was how fast they moved. Their staff showed up at my door an hour later and immediately inspected the severity of the mould in my basement before getting to work.
They came prepared with proper equipment like HEPA vacuums, air scrubbers, and moisture detection tools. It wasn’t just surface cleaning. They tracked down hidden moisture and handled it thoroughly.
After the cleanup, they carried out full remediation and replaced the materials that were badly affected. They even left me with a service warranty.
The only downside is the cost. They charge more than smaller companies and only accept Visa, Mastercard, or Interac.
I’m grateful for the prompt response from Mold Assist
“I’m grateful for the prompt response from Mold Assist when I discovered mold in my basement. They inspected and explained the risks clearly. The cleanup and repair were done diligently. Everything looks great now. Reliable service — I highly recommend them.”
-Ahmed AbdelRahman, Google Reviews
I’m relieved and satisfied with the outcome
“I reached out to Mold Assist after noticing musty smells. They responded fast and handled the inspection with care. The remediation process was efficient and thorough. They cleaned up properly and left no mess behind. I’m relieved and satisfied with the outcome.”
-Youssef Saleh, Google Reviews
4. Mold.ca
Services offered: Boat hull remediation, mould inspection, mould removal, shipping container mould removal, HVAC system mould removal, and more
Address: Exchange Tower, 130 King St W
Phone number: +1 416-504-0333
Business hours: 8:00 AM – 8:00 PM (MON-FRI)
I checked out Mold.ca and they’re pretty straightforward about what they do. Their main focus is mould removal, and they take it seriously, with clearance testing after the job to confirm things are cleaned up.
They don’t give warranties, though, since mould can come back if water issues aren’t fixed, which I get, but it might leave some people wanting more reassurance.
What stood out to me is how they handle different situations. They’ve got services for shipping containers, HVAC systems, and even boats, plus sanitisation and decontamination for tougher jobs.
That range makes them useful beyond just houses. I also noticed they use unmarked trucks, which feels considerate if you’d rather not advertise to the whole street that you’ve got a mould problem.
That said, another major downside I can point out is they don’t work weekends, so booking them can be difficult sometimes.
Wonderful experience with Mold.ca from start to finish
“Wonderful experience with Mold.ca from start to finish. Gregg came out the day after I first spoke with the company. Gregg was knowledgeable, and set my mind at ease right away. Luckily he told me that the mold was minor enough to handle myself, and gave great instructions on what to do. I hope to never need their services again, but if I do I will absolutely use Mold.ca again.”
-Aviva Kaufman, Google Reviews
An absolute pleasure to deal with
“I cannot recommend this company any more highly. Professional, honest, respectful, thorough, beyond my expectations in every way. From beginning to end, they were an absolute pleasure to deal with. Safety protocols were top notch. Knowledgeable and experienced. There was not a minute of worry. Greg and Dean and the entire team are exceptional!”
-Barbie, Google Reviews
5. Absolute Mold Remediation
Services offered: Attic sheathing remediations, mould remediation, air quality testing, infrared thermal imaging, and cottage mould removal
Address: 28 Thornhill Ave
Phone number: +1 800-578-1291
Business hours: 6:00 AM – 9:00 PM (MON-SUN)
Absolute Mold Remediation is worth checking out if you’re unsure whether you actually have mould in your house. They offer free consultations, which makes it easier to get professional advice without paying anything up front.
What I noticed is that they take their work seriously. They use infrared thermal imaging to spot hidden moisture behind walls, then apply a hydrogen peroxide solution to remove the mould.
After that, they use a salt-based inhibitor to help prevent it from coming back.
They do more than just house mould removal. Cottage mould removal is also part of their services, which is useful for seasonal places that get damp.
They also handle attic sheathing remediation, something that matters in Toronto homes where attic ventilation can be tricky.
However, they don’t have a proper online booking system, so you need to call. Their fees are also higher than the average.
Working with them was absolutely amazing!
“Working with them was absolutely amazing! From start to finish, they addressed all my concerns and were very transparent and informative throughout. They alleviated the mold issue in a rental property extremely efficiently. I will be using them moving forward if needed, and will certainly be recommending them. Thanks again!”
-Justin Domanico, Google Reviews
Helped us every step of the way
“I cannot recommend this company enough. My husband and I are first time homeowners and were overwhelmed when we found out we had a mold issue in our house. We called several companies and are so happy with Absolute. Vince and his staff helped us every step of the way and were so friendly and accommodating.”
-Jennifer Watts, Google Reviews
6. GTA Mold Removal
Services offered: Residential mould remediation, mould inspection, and cold fogging disinfection
Address: 77 City Centre Dr #501, Mississauga
Phone number: +1 647-632-8648
Business hours: Available 24/7
Another mould removal company I can recommend if you need some guidance first is GTA Mold Removal. Their technicians are certified through the Professional Mold Inspection Institute, and they offer free in-home assessments, so their advice tends to be reliable.
What I like is that they show up in unmarked vehicles, making the whole process feel discreet. Their equipment is professional-grade, with HEPA vacuums, industrial sprayers, and air scrubbers that ensure mould spores are properly dealt with.
I also found it interesting that they include cold fogging disinfection at no extra cost, which helps clear out hidden bacteria and fungi. Furthermore, they provide a 90-day satisfaction guarantee, which adds some reassurance.
Sadly, they only handle residential mould removal, so businesses are left out, and they don’t cover eastern GTA neighbourhoods like Scarborough and Oshawa.
The entire experience from quote to completion of work was great
“I recently had some work done by GTA Mold Removal Mississauga. The entire experience from quote to completion of work was great. Maria and Andrew thoroughly inspected the affected area, explained what needed to be done along with detailing the entire process. Andrew and his team arrived on time as promised. All precautions were taken and the work area was left spotless. Final invoicing was exactly what had been quoted. I would definitely recommend GTA Mold Removal Mississauga to anyone requiring mold remediation.”
-Richard Taylor, Google Reviews
Highly experienced and meticulous in their work
“I had an excellent experience with GTA Mold Removal when they tackled the mold issue in my basement storeroom. Their team of skilled technicians is highly experienced and meticulous in their work. They arrived promptly and left the work area spotless. Moreover, their pricing is reasonable. I wholeheartedly recommend this family-owned business for any mold removal needs.”
-David Law, Google Reviews
