Mold Removal in London, ON

At Masters' Guild, we provide expert mold removal services to ensure your home or business remains safe and healthy. Our experienced team specializes in mold remediation, using effective techniques and eco-friendly products to eliminate mold at its source and prevent future growth. Trust us to protect your property and enhance your indoor air quality.

Mold Removal in London, ON: Small surface area (under 10 sq ft) typically runs $550–$1,650 CAD in 2026; the other common jobs below range from $550 to $32,700, depending mostly on size and spread of the affected area. Post your job free on Masters' Guild to get offers from ID-verified local pros; payment is held until the work is done.

What mold removal costs in London, ON (2026)

Typical mold removal prices in London, ON (CAD, 2026) — low to high per job

Job	Typical range (CAD)	Unit
Small surface area (under 10 sq ft)	$550–$1,650	per job
Bathroom or single-room remediation	$1,100–$3,800	per job
Basement remediation	$1,650–$5,450	per job
Attic remediation	$2,200–$6,550	per job
Whole-home / post-flood remediation	$10,900–$32,700	per job

Estimates: typical Canadian ranges adjusted for London's regional price level (about 9% above the national average; estimate (AreaVibes cost-of-living index vs Canada national average)). Get two or three quotes for your exact job.

Our Mold Removal Expertise in London, ON

Comprehensive Mold Remediation

Our mold remediation services address mold at its root cause, ensuring thorough removal and long-term prevention. We handle mold problems of all sizes, whether it’s a small patch or widespread contamination.

Black Mold Removal

Black mold poses significant health risks, and our team is equipped to safely and effectively remove it. With professional black mold removal services, we help you regain a safe living or working environment.

Inspection and Assessment

We provide detailed inspections to identify mold growth and its underlying causes. Our mold specialists offer tailored solutions to address your unique situation and prevent future mold issues.

Affordable Mold Removal Solutions

Concerned about costs? We provide clear, upfront estimates for mold remediation costs, ensuring you receive high-quality service within your budget.

Why Choose Masters' Guild for Mold Removal?

Certified Mold Specialists: Our vetted professionals are experienced in mold removal and prevention techniques.
Eco-Friendly Products: We prioritize safe and sustainable methods to protect your health and the environment.
Transparent Pricing: Receive detailed estimates with no hidden fees for mold removal costs.
Convenient Booking: Easily schedule and manage your mold remediation services through our user-friendly app.

Get Started Today!

Post your Mold Removal Quest through our app to connect with certified specialists. Whether you need professional mold remediation, black mold removal, or an affordable mold removal company, Masters' Guild delivers reliable and effective solutions.

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Mold Removal Services We Offer

Masters' Guild provides comprehensive mold removal solutions to protect your property and improve air quality. From detailed inspections to full-scale remediation, we handle it all.

Mold Remediation: Thorough removal and prevention of mold growth.
Black Mold Removal: Safe elimination of harmful mold types.
Detailed Assessments: Identify and address the root causes of mold.
Mobile-Friendly Platform: Easily book, track, and manage your mold removal projects through our app.

What's different about mold removal in London

London winters bring nightly lows near -9.1°C in January and 194 cm of snowfall a year, with freeze-thaw cycles and lake-effect squalls that push moisture into foundations, attics, and roof lines; July highs near 26.6°C and 1,011.5 mm of annual precipitation add summer humidity on the other end. More than half of homes in the London CMA, 55.0%, are single-detached, spanning pre-1930s Victorian and Edwardian character homes in Old North and Wortley Village to postwar and 1990s-2010s subdivisions further out — older stone or brick foundations trap moisture differently than newer subdivision basements built with modern vapor barriers.

Mold jobs in London follow two seasonal peaks: April and May, as winter moisture and leaks surface once homes dry out, and August through September, when summer humidity and storm season take over; booking outside those windows, in winter, often means faster scheduling. Ontario has no provincial license for mold remediation, so ask any pro working on a home in Byron or elsewhere to confirm IICRC S520 certification and separate licensing and insurance for demolition or plumbing work. If remediation uncovers a moisture source needing repair, such as new plumbing fixtures or an altered egress window, the City of London Building Division may require a permit before that work proceeds.

What moves the price in London

Older Old North and Wortley Village homes hide moisture in stone or brick foundations, raising containment costs.
Winter freeze-thaw and lake-effect snow push remediation demand toward the April-May and August-September peaks.
Black mold containment adds 10-30% to a job regardless of the neighborhood.
Plumbing or egress-window repairs tied to the mold source may require a City of London Building Division permit.

Licensing and permits in Ontario

No provincial licence. Municipal (varies by city) — Ontario has no provincial licence for renovation contractors. Check your municipality's business licence rules (e.g. Toronto requires a Building Renovator licence) and confirm WSIB clearance and liability insurance — the province only licenses builders of new homes, via the HCRA.

Residential building permits in Ontario are issued by the local municipality's building department under the Ontario Building Code (not by the province directly), so exact triggers vary somewhat city to city. In London, permits come from the City of London Building Division.

Tax: HST applies to labor on home repair and improvement services in Ontario — unlike some US states, there's no separate labor exemption, so a contractor charges 13% HST on both materials and labor for taxable home-service work.

Best time to book in London

Demand peaks in spring (winter moisture/leaks surface as homes dry out) and late summer into early fall (humidity and storm/flood season); book off-peak in winter for better scheduling and pricing. Peak demand: April, May, August and September. Typical job length: A few hours to 1 day for small jobs; 1-5 days for basement/attic/whole-home remediation.

DIY or pro? Small, non-porous surface mold under about 10 sq ft (e.g., bathroom tile) can often be cleaned DIY with PPE and a mold-killing solution; anything larger, in HVAC/wall cavities, or suspected toxic black mold should go to a certified professional.

Areas we cover in London

Pros on Masters' Guild take mold removal jobs across London neighborhoods including Old North, Wortley Village, Old East Village, Byron, Sunningdale, Masonville, Hyde Park and Woodfield.

Frequently Asked Questions

Does mold removal in London, ON require a permit from the city?

The remediation work itself typically does not need a permit, but if the moisture source involves new plumbing fixtures, an altered egress window, or other structural changes, the City of London Building Division may require a permit before that repair proceeds.

Is a mold remediation company in London, ON licensed by the province?

Ontario has no provincial license for mold remediation or general contracting, so confirm the pro is IICRC-certified to the S520 standard and carries separate licensing and insurance for any demolition, plumbing, or HVAC work involved.

How much does basement mold remediation typically cost?

Basement remediation typically runs 1,500 to 5,000 CAD per job in Canada, with the final price depending on the affected area, accessibility, and whether black mold containment, which adds 10-30%, is needed.

Sources: Our Mold Removal cost guide · www.angi.com · homeguide.com. Updated 2026-09-10.

We Also Serve These Nearby Satellite Cities

In addition to London, ON, we also offer Mold Removal in nearby areas, including the following satellite cities:

St. Thomas, ON
Ingersoll, ON
Woodstock, ON
Komoka, ON
Strathroy, ON