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Mold Remediation in London

Mold Remediation in Ontario

What mold remediation actually involves

Mold remediation is the process of finding the moisture source that's feeding a mold problem, containing the affected area so spores don't spread through the rest of the property, physically removing contaminated materials (drywall, insulation, carpet, timber where needed), and treating remaining surfaces with antimicrobial or HEPA-filtered cleaning methods. A proper job also includes drying out the space with dehumidifiers and air movers, then verifying the fix, either through a visual clearance check or, for larger jobs, a follow-up air quality test. This is different from just wiping down visible mold with bleach, which often leaves the root cause untouched and the problem comes back within weeks.

London's building stock adds some specific wrinkles: the team terraces with solid walls and poor ventilation, converted flats with hidden damp in party walls, and basement conversions prone to rising damp all show up repeatedly in local remediation work.

What to look for in a contractor

  • Clear moisture investigation before any removal work starts, not just spraying and painting over the problem
  • Proper containment (plastic sheeting, negative air pressure) on jobs affecting more than a small patch
  • Written scope of work and a firm quote, not a vague day-rate estimate
  • Documented drying targets and a plan for post-work verification
  • Experience with the type of property you have, since a the team solid-wall flat needs different treatment than a modern new-build

How our scoring works

We rank the 19 businesses in this category using verified customer feedback, responsiveness, and evidence of proper remediation practice rather than just cosmetic cleaning. The full ranked list is at best water damage restoration services in London, and the criteria behind every score are explained on our methodology page.

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All mold remediation in London, ranked by score and relevance

19 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.

New Budget Mould Removal Inc
4.8(18)✓ Google-verified

Reviewers consistently report fast, professional mold removal with transparent pricing and detailed photo documentation. Work often finishes ahead of schedule and leaves properties clean; one complaint cites unresponsive phone lines and confusion between two similarly-named companies.

London Steam Carpet, Upholstery & Air-Duct Cleaning
4.8(961)✓ Google-verifiedPublishes prices

London Steam delivers consistent, fast service that wins over both homeowners and contractors. Technicians arrive on schedule, clean carpets and ducts thoroughly, and work courteously; pricing undercuts competitors. One no-show and occasional cleanup debris tempered an otherwise strong track record. The business handles same-day requests, serves London and surrounding areas, and lists specialized work on air ducts, upholstery, and water extraction alongside carpet cleaning. Experience spans over 30 years; their website lists starting prices from $119.95 for carpet and $169 for duct packages.

FIRST ONSITE Property Restoration
4.6(104)✓ Google-verified

First Onsite arrives quickly to ice storms, floods, and fires, often within an hour of the call. Staff walk homeowners through each step, handle insurance details without hassle, and ensure property protection and daily cleanup throughout the job.

Restore, Renovate, Build (formerly Restoration 1 London)
4.7(67)✓ Google-verified

Early morning calls get answered by management; crews arrive within 20 minutes to an hour for basement floods, and water extraction is followed by full documentation for insurers. Reviewers note the team walks them through every step and keeps them updated as work progresses from drying to floor replacement and painting, with final results that look professionally finished. The business handles the whole chain: water removal, structural drying, mould remediation, and reconstruction (flooring, baseboards, repainting). Pricing is described as fair and reasonable for the scope of work, though some pay a $250 assessment fee. Crews show respect for the home and its contents, and the owner or manager often comes out personally for complex jobs.

Across Canada Restorations
4.7(39)✓ Google-verified

Reviewers consistently report same-day or next-day arrival, with staff who diagnose problems clearly and complete work without leaving mess. The team's honesty stands out: they explain options plainly, refuse to oversell, and fix mistakes (like accidentally broken pipes) immediately. Across Canada handles flood extraction with industrial dehumidifiers and large fans, mold assessment and remediation, ice dam removal, roof work, and sump pump replacement. Staff named include the team and the team, both praised repeatedly for reliability and care. One reviewer called them "the best job in Canada" for responsibility and punctuality.

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Hudson Restoration London
4.7(26)✓ Google-verified

Staff arrive within 15-45 minutes of a call, treating water, fire, and flood damage with hands-on care. Reviewers consistently mention being checked on for weeks after work ends, getting honest advice even about unrelated problems, and experiencing no-nonsense professionalism from assessment through renovation. The team manages contractors, handles insurance coordination, and explain each step clearly so homeowners understand what's happening.

PuroClean Restoration London
4.8(27)✓ Google-verified

Fast, professional response and expert guidance through water damage and fire restoration. Mo and his team consistently help homeowners navigate insurance approval, complete mitigation work quickly, and restore property to like-new condition. Reviews highlight thorough assessment, clear communication, and work done ahead of schedule.

First General London/Middlesex
4.7(115)✓ Google-verified

Most customers praise the team for rapid response, transparent updates from start to finish, and skilled handling of water and wind damage. Staff coordinate directly with insurance, reducing stress during recovery. However, three reviewers reported steep demolition bills that depleted their insurance settlements, leaving little for repairs, and cited concerns about scope creep, unfulfilled promises, and pressure to pay for emergency charges.

DKI - Lubnow Restoration
4.7(28)✓ Google-verified

Customers consistently praised DKI - Lubnow for arriving within hours of water damage, basement floods, and fire damage emergencies. Staff managed insurance claims directly, kept people informed daily, and completed work on time and to specification. Reviewers noted the team worked around tenant schedules and handled supply chain delays without blame.

Restoration Mate London
5.0(6)✓ Google-verified

All seven reviews awarded five stars, consistently praising rapid emergency dispatch, transparent step-by-step communication, and polished workmanship across water damage, mold remediation, and restoration projects. Staff arrived quickly to basement pipe bursts, ceiling leaks, and mold discoveries, assessed damage thoroughly, deployed equipment promptly, and left homes clean and restored on schedule.

London Extreme Clean
4.6(27)✓ Google-verified

London Extreme Clean earns consistent praise for speed and professionalism across challenging jobs: mold removal, trauma cleanup, and odour elimination. Reviewers often name the team by role, noting both technical skill and genuine compassion during difficult moments. Two complaints document missed callbacks on rental and service inquiries, a notable gap in an otherwise responsive operation.

SERVPRO of London

#12SERVPRO of London

73 low data
4.6(13)✓ Google-verified

Reviewers across water damage, mold, and fire calls report arrival within 40 minutes to an hour, with crews that work efficiently and update them throughout. One recent complaint alleges flooding caused by the company itself with no follow-up. Staff handle basement floods, attic mold, kitchen water damage from appliances, and fire aftermath. The owner personally checks in on jobs. Drying equipment stays on-site for full remediation.

Shamas Contracting Inc

#13Shamas Contracting Inc

69 low data
4.2(20)✓ Google-verified

Most jobs completed to high standard with staff who arrive promptly and work around children and pets without mess. Four reviews mention concerns about communication delays and one instance of a no-show years ago, but recent jobs show consistent speed and care.

BELFOR Property Restoration
3.9(96)✓ Google-verified

Strong technical performance on water, fire, and flood damage mitigation, with crews praised for professionalism and attention to detail. However, serious concerns arise from multiple reports of aggressive driving by marked company vehicles and at least one complaint of sloppy workmanship, long delays, and unfinished repairs after years of waiting.

Canada Pro Restoration

#15Canada Pro Restoration

65 low data
5.0(14)✓ Google-verified

Every reviewer praises speed and professionalism. Staff arrive quickly during floods, complete work cleanly, and communicate clearly throughout. Reviewers trust the owner's character and return because results match promises.

WINMAR Property Restoration Specialists - London
3.8(121)✓ Google-verified

Strong emergency response and project coordination have won over many customers, particularly those facing major floods and fires. The team, the team, and other named project managers earned consistent praise for responsiveness and attention. However, pricing complaints surface repeatedly-reviewers report 50% markups and hidden fees that feel opportunistic during crisis situations. Service quality varies sharply by crew: some deliver immaculate work and keep properties clean; others leave jobs only partially finished or conduct themselves unprofessionally on-site. The 3.8-star rating reflects this split, with nearly two-thirds five-star reviews offset by a substantial block of one-star accounts.

On Side Restoration Services
3.7(62)✓ Google-verified

Five-star reviews highlight fast response times, clean job sites, and capable crews who handle water damage and fire restoration with respect and care. Two one-star reviews describe extended timelines, poor finishing work, unfinished repairs, and inadequate materials handling on sewage backup jobs, leaving customers frustrated despite insurance payments. Most recent projects show consistent professionalism: teams bring protective covers, deploy equipment promptly, coordinate subcontractors quickly, and maintain open communication. However, isolated cases reveal inconsistency in workmanship quality, particularly in post-damage finishing and material accountability.

Emergency Flood Response

#18Emergency Flood Response

61 low data
4.6(10)✓ Google-verified

Staff respond quickly to floods and water damage, handle extraction and drying, and keep homeowners updated throughout. Multiple reviewers praise the quality of restoration work and the personal care shown by the owner and team, particularly when handling complex jobs like mold removal or asbestos cleanup.

Water Damage

#19Water Damage

28 low data
No rating yet

Review evidence is limited. The business claims over 15 years of operation and IICRC the team Water the team certification. Service area spans London, Essex, Dorchester, Stratford, and surrounding towns.

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Common questions about mold remediation

How much does mold remediation cost in London?
Small, contained jobs (a bathroom ceiling or a corner of a bedroom wall) often run a few hundred pounds. Larger jobs involving whole rooms, subfloor removal, or basement damp can run well into the thousands, especially once drying equipment hire and rebuild work (plastering, redecorating) are included. Get a written scope before agreeing a price, since 'mold removal' quotes that don't specify what's included can balloon once work starts.
How do I know if I need remediation or just cleaning?
Small surface mold on a windowsill or shower tile, less than about the size of a hand and with no musty smell spreading through the room, can often be cleaned yourself with proper ventilation and a mold-rated cleaner. Anything larger, recurring, hidden behind walls or under flooring, or linked to a known leak or flood usually needs a professional to find and fix the moisture source, not just treat the symptom.
What should I expect during a remediation job?
Expect an initial inspection (often with a moisture meter), a written quote covering containment, removal, treatment and drying, then the physical work itself, which can take anywhere from a day for a small patch to over a week for a whole room with structural drying. Reputable firms will also address why the mold appeared, whether that's a roof leak, poor ventilation, or rising damp, so it doesn't come straight back.
How can I judge if the work was done properly?
Ask for photos of the affected area before, during, and after treatment, and check that the quote mentioned addressing the moisture source, not just removing visible mold. For bigger jobs, a post-remediation verification (visual inspection or air test) confirming the area is clear is a good sign of a contractor that stands behind their work.

Last updated 2026-08-12