AMC Environmental Corp
“Technician showed up on time and introduced himself right away told me his approach to the situation and answered all of my questions”
Best Mold Inspection & Testing in Toronto, ON
15 companies listed · 11 in Toronto · 8 open 24/7 · 14 open weekends · 13 rated 4.5+
Data verified October 18, 2026
Cleanfirst Restoration
“They helped us with asbestos abatement as well as cleaning out our old attic insulation in Leaside.”
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Housemaster Home Inspections Serving Toronto
“Through job, my clients and I were very satisfied with his level of knowledge and experience, as well as his disclosure of all issues and potential issues in the unit.”
The Mold Guy
“They arrived on time, with all the equipment they needed, waited for me to check the work before they left, office staff have been more than helpful, and kept me informed along the way”
Guru Restoration
Mold.ca
“Great experience speaking with Indira who was extremely patient and informative about all the different options to inspect and treat my issue.”
Listed for homeowners in and around Toronto, ON, these 15 companies test for mould and indoor air problems. Listings show what each one states about sampling, lab work and the environmental tests it offers, plus ratings and quotes from public reviews.
Area overview: Toronto, ON
11 of the 15 companies we list are based in Toronto; the other 4 serve Toronto from North York (6 km) and Scarborough (14 km). 14 of the companies on this page have a rating, from 4.0 to 5.0 across 2,287 reviews; 8 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (96%), quality (84%) and responsiveness (84%). The topics that come up most in reviews of the companies on this page are "estimates" and "price". 8 are open around the clock; 14 are open on Saturdays and 11 on Sundays. The services the companies on this page list most often on their websites are mold inspection (5), air quality testing (3), asbestos removal (3), indoor air quality testing (2) and interior demolition (2). 2 show a licence on their websites and 3 list staff certifications (IICRC). Domain records put 2 websites of the companies on this page at ten or more years old; the oldest dates from 2014. 8 offer emergency call-outs; 5 give free estimates and 1 lists coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Is one opinion enough on a damp problem?
Not when the first visit ends with a large removal quote attached. You have 15 companies on this page, so getting a second diagnosis is straightforward. Ask each one what it thinks the water source is. Two independent answers that match is the strongest signal you will get.
5 Star Dry All
“After a leak caused serious water damage in our home, they handled everything with care and professionalism”
Mold Removal Toronto LTD
“The toilet repair service was able to fix a broken handle on my toilet.”
GTA Mold
“Not only is the staff of GTA MOLD highly skilled, they are also trustworthy.”
Water Damage Toronto Mold Removal Inc.
“They were able to restore my home to its pre-fire condition, and I couldn't be happier with their work.”
America Contracting Group
Xtreme Controls
“They quickly identified the problem, explained each step clearly, and made sure everything was cleaned and treated properly.”
Restoration Mate
“He did a fantastic job repairing the drywall in my apartment and fixing the silicone in the shower.”
Solex Group Professional Home Inspection
“He was very thorough during the home inspection, and we received the report within 24 hours.”
Pro Max Restoration
“Their service was incredibly fast, and Cleo also offered valuable advice based on his experience, which I definitely took to heart.”
Why these companies made our list
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