Toronto basement flooding subsidy: the rule card.

Program rule card

Per the City of Toronto Basement Flooding Protection Subsidy Program page, verified as of 2026-08-20:

Source: City of Toronto: Basement Flooding Protection Subsidy Program. $6,650 is a maximum across all five eligible-work categories combined, not a per-project entitlement for a single job. See the table below.

The real per-item caps behind the $6,650 figure

$6,650 is not one pot of money for one job. It is the sum of five separate, per-item lifetime caps, each at 80% of eligible costs. A homeowner doing the single most common job, one backwater valve, has a real ceiling of $1,600, not "up to $6,650."

Source: City of Toronto subsidy page, verified 2026-08-20. Two backwater valves plus every other category maxed out is how a property reaches the full $6,650. One backwater valve alone tops out at $1,600 (or $3,200 for a second device).

What work qualifies

Per the Toronto subsidy page (verified 2026-08-20), the following flood-protection measures are eligible when installed by a licensed contractor, each subject to its own cap above:

• Backwater valve: a device that prevents sewer water from backing up through the floor drain. Requires a building permit and city inspection before concrete is patched. Capped at $1,600 per device, max 2 devices.
• Sump pump: installs in the basement to pump groundwater away from the foundation. Capped at $2,250, max 1.
• Battery backup for sump pump: keeps the pump running during power outages. Capped at $300.
• Plumbing assessment: a professional assessment of the drain system. Capped at $500, one-time.
• Foundation drain (weeping tile) pipe severance and capping: severing and capping the underground connection to the sewer lateral, not full weeping-tile replacement. Capped at $400.

Contractor licence requirement

The contractor must hold a valid City of Toronto business licence at the time of the work. Per the City's own contractor-licence table (verified 2026-08-20), which licence classes qualify depends on the job:

T85 (Building Renovator) is not licensed for backwater valve installation or the home plumbing assessment. The City states: "If your contractor does not have a valid City of Toronto licence, you will be denied funding for the work completed." For a backwater valve job specifically, the qualifying licence classes are T94, T92, or T87 only. Work by an unlicensed contractor, or a contractor licensed for the wrong category, is not rebatable regardless of the quality of the application. The City also recommends getting a minimum of two quotes as well as references before hiring.

Eligibility gate

The Toronto program states the following eligibility conditions (verified 2026-08-20 on the official subsidy page):

• You are the registered owner of the property.
• The property is a single-family home, duplex, triplex, or fourplex.
• The property is connected to the City of Toronto sewer system.
• No outstanding City tax arrears on the property.
• Work is performed by a licensed Toronto contractor holding the correct licence class for that job (see the table above).
• Downspouts from the property's eavestrough are already disconnected from the City's sewer system, or exempted by the City: a precondition for other eligible work, not itself a paid item.
• A building permit is obtained before backwater valve installation begins.
• A city inspection is completed before the backwater valve is covered.
• All front yard paved areas of the property, including parking pads, comply with the City's Zoning By-law requirements.
• Properties have a lifetime maximum subsidy amount for each type of eligible work, and subsidies are issued first-come, first-served, subject to annual funding approved by City Council.

Rejection-proof checklist

Most Toronto subsidy rejections are administrative. Based on the rejection reasons listed on the official Toronto subsidy page (verified 2026-08-20), an administratively sound application includes:

• Contractor business licence confirmed valid before work begins. Ask for the licence number and verify it is current.
• Building permit obtained before the backwater valve job starts. Permit number goes on the invoice and the application.
• City inspection booked and completed before the valve location is patched with concrete. Do not cover the work until the inspector signs off.
• Itemized invoice listing each device and service separately, marked "paid in full," with the contractor's name, address, and licence number.
• Proof of payment (bank statement or cleared cheque matching the invoice total).
• Property tax account confirmation showing no outstanding arrears.
• Proof of ownership (current property tax bill or land transfer documents).
• Application filed within 2 years of the installation date for work completed on or after November 12, 2025.

Where to apply

Applications go to the City of Toronto directly. The official program page at toronto.ca (Basement Flooding Protection Subsidy) has the current application form and any updated instructions. Verify the current rules and deadline there before filing.

Questions about building permits for backwater valves: the Toronto building permit guide for standalone plumbing and drains is at toronto.ca (Backwater Valve building permit guide).

See the St. Catharines FLAP page if your property is in St. Catharines, the Niagara Falls WRAP page if your property is in Niagara Falls, or the Welland SWAP page if your property is in Welland.