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Water damage and mould remediation in Greater Toronto

Restoration firms for drying and mould removal.

56 pros in Greater Toronto

In Toronto, water usually gets into a basement during heavy rainfall or when snow and ice melt, and the City lists foundation cracks, poor lot grading, weeping tile or sump pump failure and sewer back-ups as common causes. That matters before you hire anyone for drying out or mould removal, because the cause decides who pays and what else needs fixing. If the water came from a private blocked drainpipe, leaking foundation walls or poor drainage on your property, the City says you are responsible for repairs and any subsequent damage. If sewage was involved, the City's guidance is to remove and discard contaminated drywall and insulation, then wash, rinse, dry and ventilate the area. So ask any firm how it handles contaminated materials, how it will dry the space, and whether it will tell you the likely source of the water. Call your insurer early, and keep written scope and photos for your claim.

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What to know in Greater Toronto

  • As of May 1, 2026, Toronto's Basement Flooding Protection Subsidy Program offers up to $6,650 in subsidies per property, and the expanded amounts apply to eligible work completed on or after November 12, 2025.

    City of Toronto (source, opens in a new tab)

  • Owners of a single-family, duplex, triplex or fourplex home in Toronto can apply for the subsidy. Eligible work is a home plumbing assessment, backwater valves (up to two) with alarms, a sump pump with alarm and battery backup, and severing and capping a storm sewer or external weeping tile connection.

    City of Toronto (source, opens in a new tab)

  • For work completed on or after November 12, 2025, Toronto subsidizes up to 80 per cent of the invoiced cost of backwater valves, to a maximum of $1,600 per device (maximum two devices). Sump pumps get up to 80 per cent to a maximum of $2,250 (one device), and a sump pump battery backup gets up to 80 per cent to a maximum of $300.

    City of Toronto (source, opens in a new tab)

  • Toronto subsidizes up to 80 per cent of the invoiced cost of a one-time home plumbing assessment, to a maximum of $500, and up to 80 per cent of weeping tile severance and capping, to a maximum of $400. The plumber must be licensed and complete the City's assessment form for the assessment subsidy.

    City of Toronto (source, opens in a new tab)

Before you hire

  1. Ask how fast they will start drying: Health Canada says a home dried within 48 hours is less likely to grow mould.

    Source: canada.ca (source, opens in a new tab)

  2. Health Canada suggests professional help for extensive mould, meaning a patch larger than 3 m².

    Source: canada.ca (source, opens in a new tab)

  3. Get written quotes from at least three contractors for the same work, and check references from recent clients.

    Source: ised-isde.canada.ca (source, opens in a new tab)

Questions about hiring in Greater Toronto

What should I do first after my Toronto basement floods?

The City says to contact Toronto Hydro to shut off power if water has risen above outlets or near the electrical panel. It also says to report the flooding to 311 and to call your insurance company as soon as possible. Do this before arranging any restoration work. City of Toronto (source, opens in a new tab)

Who pays if the flooding came from my own property?

Toronto says that if flooding results from a private blocked drainpipe, leaking foundation walls or poor lot drainage on your property, you are responsible for repairs and any subsequent damage. It also says you may submit a flood claim to the City. Ask your insurer how that affects your claim. City of Toronto (source, opens in a new tab)

What should a quote for water damage and mould work include?

Ask for a written scope that names the affected rooms, which materials will be removed and discarded, how the area will be dried, and how mould will be handled. It should state the start date, who does the work, and what happens if more damage is found once walls are opened.

How does Toronto say a sewage-flooded basement should be cleaned?

The City's guidance says to remove and discard drywall and insulation contaminated with sewage or flood waters. Surfaces should be washed with hot water and detergent, rinsed, then thoroughly dried and ventilated. Check that any quote you receive covers these steps for sewage-related water. City of Toronto (source, opens in a new tab)

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