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Mold Remediation in Toronto

Mold Remediation in Ontario

Mold remediation is the process of finding a mold problem, containing it so spores don't spread to the rest of the house, removing the affected material, and treating the area so the mold doesn't come back. It's different from just cleaning a moldy wall with bleach. A proper job includes containment barriers, negative air pressure or HEPA filtration, removal of porous materials that can't be salvaged (drywall, insulation, some flooring), and often a fix for whatever moisture problem caused the mold in the first place. That last part matters: remediation without addressing the water source is a temporary fix.

Toronto's older housing stock, humid summers, and finished basements make this a common issue, especially after flooding, roof leaks, or long-term condensation problems in attics and crawl spaces. With 33 companies offering this service in the city, quality varies a lot. Look for contractors who follow IICRC S520 standards, use third-party air quality testing before and after the job (ideally through an independent hygienist, not just the remediation company itself), give a written scope of work, and carry proper insurance for mold-related liability. Be wary of anyone who quotes a price over the phone without inspecting the space, or who pushes unnecessary demolition.

Our scoring weighs certifications, verified reviews, response speed, and how clearly a company documents its work, so you can compare firms on more than just price. For the full ranked list with scores and reasoning, see our best water damage restoration services in Toronto guide, and check our methodology for how we evaluate each business.

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All mold remediation in Toronto, ranked by score and relevance

31 businesses, scored on recent reviews. The order weighs each business's overall score by how much of its reviewed work is mold remediation, so a lower-scored specialist can rank above a higher-scored generalist.

Ultimate Mold Crew - Mold Removal Toronto
4.9(77)✓ Google-verified

Across two decades of steady operation, staff consistently answer calls same-day and complete jobs on schedule with meticulous before-and-after documentation. Work covers mold removal from attics and basements to water damage and interior demolition, always with transparent quotes and detailed follow-up certificates that reassure homeowners the problem is genuinely solved. Reviewers praise fair pricing relative to competitors and note the crew treats each home as their own. Technicians diagnose root causes (ventilation failures, waterproofing gaps) rather than just removing visible mold, and staff handle remote consultations smoothly when clients are out of province. No complaints emerge from the review pool.

AMC Environmental Corp
5.0(122)✓ Google-verified

Reviewers consistently report fast response times, clear communication, and professional expertise from staff. Projects finish on schedule with spotless job sites; independent testing confirms successful work. The team accommodates urgent requests and stays available on weekends, with detailed quotes preventing surprises. Services span asbestos testing and abatement, mold remediation, basement demolition, and vent removal across older Toronto homes. Standout strength is the ability to resolve problems quickly while keeping clients informed and reassured throughout.

MOLD REMOVAL TORONTO LTD
5.0(8)✓ Google-verified

All eight reviews are five-star, with recent work highlighting mold detection behind walls, attic remediation, and clear communication about moisture prevention. The team has earned praise for competitive pricing and rapid response to plumbing emergencies, though review volume is modest.

Direct Basement Waterproofing Toronto
5.0(128)✓ Google-verified

Water seeps in and the job gets done right: reviewers found their basement leaks sealed by a team that shows up on time, explains the plan clearly, and leaves the house cleaner than it started. The team waterproofing, interior walls, sump pumps, backwater valves, and weeping systems all get the same thorough treatment. Years of dampness disappear, and months later after heavy rain, the basement stays bone dry. The experience itself is what separates this outfit. Staff answer calls and emails same-day, visit regularly to check progress, and protect floors throughout. Crews work efficiently without cutting corners or pitching needless add-ons. Finished faster than promised, worksite tidy every night. Reviewers describe feeling genuinely confident in their home for the first time.

Aquamaster Basement Waterproofing Toronto
4.9(281)✓ Google-verifiedPublishes prices

Reviewers consistently report that the team diagnoses moisture and foundation issues correctly, explains the solution in plain terms, and delivers work that stays dry through heavy rain. Most praise the speed of initial assessment (quotes within 24 hours in one case), the care taken during excavation and backfill, and the fact that interiors are left spotless. One complaint about two no-shows stands against 98% five-star ratings.</summary> <parameter name="sentiment_tags">["fast-response", "professional-crew", "thorough-drying", "courteous-staff", "punctual", "saved-property"]

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Luso Roofing & Contracting Inc | Toronto
4.9(62)✓ Google-verified

Luso earned trust across a decade-plus customer history by showing up fast when roofs fail, diagnosing the root cause instead of just patching wet spots, and explaining each step clearly. They charge fairly, keep job sites clean, and often solve leaks other contractors missed, building a repeat customer base that spans multiple properties and years. Their website lists 30+ years in business with roofing services from inspections to full installations, plus certifications in ventilation and local licensing. Reviews consistently highlight the team and his father as a small family team that treats emergency calls (even 5am roof leaks) with the same care as scheduled repairs.

CleanFirst Restoration
4.9(100)✓ Google-verified

Staff deliver fast, thorough mold assessments and remediation across the Toronto area with transparent pricing and honest advice. Reviewers consistently praise the team's professionalism, clear explanations of work required, and willingness to handle jobs promptly-including weekends-while keeping spaces clean and respecting customers' concerns.

CD Flood & Sewer Water Damage Cleanup
5.0(386)✓ Google-verified

Nearly all customers report arriving technicians within an hour of their call, with the team and the team taking charge immediately and explaining each step clearly. Water extraction, drying, and mold treatment were done thoroughly enough that homes looked "like nothing ever happened"-whether dealing with burst pipes, sewage backups, or storm flooding. One exception: a customer a year ago felt abandoned after an initial call and got no email replies. That single complaint stands against 385 five-star reviews praising speed, professionalism, and the calm competence of the team during disasters.

The Mold Guy
4.7(288)✓ Google-verified

Most appointments happen same-day or within 30 minutes. The team explains findings clearly and leaves homes clean, with staff like the team and the inspectors earning specific mention for thoughtfulness. Two reviewers had poor phone interactions and one inspection felt rushed and incomplete, with a cash deposit request that rankled. Services span mold removal, attic work, and air quality testing across the GTA. Documentation arrives quickly even on weekends. The business claims 17 years' experience and IICRC certification, though review evidence focuses on day-to-day professionalism rather than credentials.

TRUFORCE LTD.
5.0(25)✓ Google-verified

All 25 reviews are five-star. Customers consistently praise TruForce's rapid arrival, professional crew, and transparent communication. Reviewers highlight mold removal, water extraction, and ceiling repair work completed on time and left clean. One customer noted IICRC certification and high-end drying gear. The team handles basement floods, bathroom damage, and multi-area restoration. Customers repeatedly mention efficiency, respect for property, and results that exceed expectations. No complaints or concerns appear in the review set.

Sentinel Maintenance Inc (SMI)
5.0(6)✓ Google-verified

Six reviewers across two years describe consistent professional cleaning and responsive service. Long-standing clients praise the owner's communication and the team's ability to meet strict standards in offices, condos, and event venues. All rated five stars.

Facility Plus

#12Facility Plus

75 low data
5.0(12)✓ Google-verified

All 12 reviews are five-star. Reviewers praise fast response, attention to detail, and professional execution across services from electrician work to office moves to cleaning. No complaints appear in the review record.

Mold.ca

#13Mold.ca

73 low data
4.7(16)✓ Google-verified

Staff members offer upfront advice before recommending paid work, often steering people toward DIY solutions when appropriate. Work itself is thorough: crews explain their plan, clean up well, and follow up after jobs finish. One old complaint about premium pricing and subpar work stands against nearly two decades of five-star reviews praising honesty and professionalism.

Water Damage Toronto Mold Removal Inc.
4.7(3)✓ Google-verified

Team arrived quickly after burst pipes, assessed damage clearly, and completed work in under an hour with minimal mess. Evidence is limited to three reviews spanning three years, with one recent review showing less engagement.

The Restorators - Toronto
4.6(67)✓ Google-verified

The team's team arrives fast and handles emergencies with professionalism, packing and storing belongings while guiding clients through insurance claims. However, several customers report final invoices far exceeding initial quotes (some more than double), work taking months to complete, and frustration with unavailability during follow-up phases. For straightforward emergency mitigation, The Restorators deliver well. The tension emerges during rebuilds: scope expands, timelines extend, and communication falters when the owner is away. Get cost details and scope in writing before work begins.

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Pro Max Restoration of Downtown
5.0(10)✓ Google-verified

All 10 reviews are five-star. Customers praise quick turnaround, professional handling, and support with insurance claims. Detail is limited, but work on mold, basement water damage, and burst pipes comes up across the feedback.

ONT Restoration services

#17ONT Restoration services

71 low data
5.0(6)✓ Google-verified

All six reviewers rate ONT five stars. Fast dispatch, professional cleanup, and hands-on insurance support distinguish the experience. Staff guide clients through claims end-to-end, and pricing is stated upfront rather than after assessment.

5 Star Dry All - Water Restoration Toronto
5.0(4)✓ Google-verified

All four reviews praise fast emergency response and professional handling of water damage work. Reviewers note quick team arrival, thorough drying, complete cleanup, and reasonable rates.

GTA Mold Removal Toronto

#19GTA Mold Removal Toronto

58 low data
4.2(5)✓ Google-verified

Four five-star reviews highlight professional, timely mold removal with no hidden costs. Work covers basements and cellars, with staff going beyond standard scope to ensure complete remediation.

Chem-Dry Toronto

#20Chem-Dry Toronto

67 low data
4.2(20)✓ Google-verified

Most jobs deliver clean results and polite service, but cost estimates can balloon mid-job and technician quality varies. Scheduling reliability and complaint handling appear to be weak points.

MoldCare

#22MoldCare

65 low data
5.0(14)✓ Google-verified

All 14 reviews are five-star. Callers consistently report same-day or rapid response, particularly appreciating detailed explanations that help homeowners understand their mold situation. Staff provide honest options, fair pricing, and practical DIY tips alongside full remediation work.

Shield Water Damage Restoration and Repair — Downtown Toronto
4.3(7)✓ Google-verified

Most customers report arriving crews quickly handle water removal and structural drying without cutting corners, leaving homes restored and communication clear throughout. However, a handful describe disorganization, unfinished jobs, and crews dismissing their concerns, suggesting service quality varies significantly.

Guru Restoration

#24Guru Restoration

61 low data
4.3(3)

One reviewer reported a disconnected phone line in April 2024, raising questions about current operations. Limited review detail makes it hard to assess service quality or consistency.

GTA Restoration Corp.
3.8(25)✓ Google-verified

Fast crews show up and deliver solid technical work, with five-star jobs marked by professional handling and respect for the property. But office communication stumbles badly: estimates balloon into invoices three times higher, travel time and equipment fees catch customers off-guard, and scope disputes leave people feeling misled.

GTA Mold

#27GTA Mold

57 low data
5.0(2)

GTA Mold arrives same-day for inspections and rebuilds water-damaged areas with clear pricing and full detail. Both five-star reviews cite skilled, trustworthy staff who handle everything from mold detection to structural repair.

Emergency101

#28Emergency101

48 low data
1.0(1)

Not enough recent reviews yet to synthesise a reliable sentiment read for this business.

floodrestorationgta.com

#29floodrestorationgta.com

32 low data
No rating yet✓ Google-verified

Review evidence is limited; profile based on the business's stated service menu and certifications. The business claims IICRC and biohazard certification, operates across the Greater Toronto Area, and lists emergency water extraction and mold remediation as core services since 2009.

TKI Restoration

#30TKI Restoration

28 low data
No rating yet✓ Google-verified

Not enough recent reviews yet to synthesise a reliable sentiment read for this business.

York Restoration

#31York Restoration

28 low data
No rating yet✓ Google-verified

No customer review text is available for this business, so specific feedback on their work quality, response time, or service delivery cannot be assessed. The business operates in Old Toronto and claims IICRC certification and service across the GTA.

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Common questions about mold remediation

How much does mold remediation cost in Toronto?
Small, contained jobs (a bathroom ceiling or a closet, for example) often run a few hundred to around $1,500. Larger jobs involving a basement or crawl space, with containment, air scrubbers, and drywall removal, commonly fall between $3,000 and $8,000. Extensive whole-house remediation after major flooding can run higher. Get a written quote after an in-person inspection rather than relying on a phone estimate.
How often does a house actually need mold remediation?
Most homes never need it if moisture is controlled, but it becomes necessary any time there's been water intrusion (a leak, flood, or chronic condensation) that wasn't dried out within 24 to 48 hours. Basements and bathrooms are the most common repeat spots because they hold humidity longest.
What should I expect during the remediation process?
Expect an initial inspection (sometimes with moisture meters or a borescope), a written scope of work, containment setup with plastic sheeting and negative air machines, removal of damaged materials, HEPA vacuuming and antimicrobial treatment, and a final clearance check. A job usually takes one to five days depending on the area affected.
How do I judge whether a mold remediation company did quality work?
Ask for post-remediation verification, ideally an independent air quality or surface test showing spore counts back to normal background levels. A company confident in its work will support third-party testing rather than only offering its own visual sign-off.

Last updated 2026-08-12