Mould remediation that fixes the cause
Mould is almost always a moisture problem first. We find the water that's feeding it, contain the area so spores don't spread, remove what's contaminated, and dry the structure — so it doesn't come back.
- ~60 min arrival, 24/7
- IICRC-certified crew
- Insurance-ready documentation
- Fully insured · WSIB
Get help with mould removal
Tell us what's happening. A real person from our team will call you right back — day or night.
Signs you need mould removal help
- Black, green or white spotting on walls, ceilings or window frames
- A persistent musty smell in the basement or closets
- Peeling paint or wallpaper in humid rooms
- Condensation that won't go away on windows
- Allergy-like symptoms that ease when you leave the house
Where we find mould in GTA homes
Finished basements after an old leak, attics with poor ventilation or bathroom fans that vent into them, behind bathroom tile, around windows in older homes, and in condos with heavy condensation in winter.
Remediation standard
We follow the IICRC S520 approach: contain, remove, clean, dry, verify. Spraying bleach over visible mould hides it without solving it — we don't do that.
How much does mould remediation cost in the GTA?
Most mould remediation jobs in the GTA cost between $1,500 and $6,000. Small, surface-only problems can be under $1,000; a whole basement or attic can be $8,000 or more. The price depends on the area affected, what the mould is growing on and how much containment is needed.
| Area | Typical cost* |
|---|---|
| Small area under 10 sq ft (window sill, behind a toilet) | $500 – $1,500 |
| Bathroom or single room, with some drywall removal | $1,500 – $4,000 |
| Attic roof sheathing | $2,500 – $7,500 |
| Finished basement with full containment | $4,000 – $10,000+ |
| Mould testing / air sampling (optional) | $300 – $800 |
*Before HST. Rebuild after removal (new drywall, insulation, paint) is extra. Read the full mould remediation cost guide.
Mould Remediation across the GTA
We provide mould removal in Mississauga, Toronto, Brampton, Oakville, Etobicoke, North York, Scarborough, Vaughan, Markham, Richmond Hill, Milton, Burlington, Caledon, Halton Hills, Hamilton, Pickering, Ajax, Whitby, Oshawa, Newmarket, Aurora. Our crews are based in Toronto, which keeps response times short across Peel, Halton, York and the City of Toronto.
Mould removal by city
Toronto, Mississauga, Brampton, Vaughan, Markham, Richmond Hill, Oakville, Burlington, Milton, Etobicoke, North York, Scarborough, Hamilton.
Recent mould removal work from our crew
Photos and video from our crew's containment and restoration work. See all projects →
▶ VideoFull basement containment before removal work
Room-by-room poly containment and HEPA air scrubbers across a whole basement.
See the project
▶ VideoAttic mould remediation
Technician in full PPE treating mould on attic roof sheathing.
See the project
▶ VideoCorridor containment in a multi-residential building
Sealed work zone along a residential hallway; units stayed accessible.
See the projectHow we handle mould removal
Inspect
Visual inspection, moisture mapping and, where useful, third-party air or surface sampling.
Contain
Poly containment and negative air pressure with HEPA filtration isolate the work area.
Remove
Contaminated porous materials are removed; structural wood is cleaned and treated.
Fix moisture
We identify the leak, condensation or humidity issue so the problem doesn't return.
Restore
Rebuild with new materials, and a clear report you can keep for resale or insurance.
Mould Removal questions
How do I know if I need professional mould removal?
Small spots (under about one square metre) on hard surfaces can often be cleaned by a homeowner. Larger areas, mould inside walls, or mould after flooding or sewage should be handled professionally.
Does insurance cover mould?
Mould resulting from a sudden, covered water loss is sometimes included; mould from long-term humidity or gradual leaks usually isn't. We'll help document the cause.
Water where it shouldn't be?
The first hours matter most. Reach a real person now — day or night.