Sanitary + storm sewer backflow protection
Toronto Backwater Valve Rebate Help
Private backwater valve installation and documentation support for Toronto homeowners using the City of Toronto Basement Flooding Protection Subsidy Program.
Private service company. Not the City of Toronto or City of Markham. Municipal rebate approval is determined by the municipality.
Toronto backwater valve subsidy summary
Toronto lists backwater valve installation or replacement and backwater valve alarms as eligible work under the Basement Flooding Protection Subsidy Program. Expanded amounts apply to eligible work completed on or after November 12, 2025, with applications starting May 1, 2026.
| Item | Published rebate/support detail |
|---|---|
| Backwater valve installation or replacement | Up to 80% of invoiced cost, to a maximum of $1,600 per device; maximum two devices for eligible expanded-program work. |
| Backwater valve alarm | Eligible as part of the backwater valve subsidy category, subject to City rules and approval. |
| Permit and inspection | A building permit is required before installation and inspection is required after installation before the valve is enclosed or covered. |
| Documentation | Original electronic invoices from licensed contractors/subcontractors and City application submission are required. |
Toronto application support checklist
- Confirm the property is in Toronto and the owner meets City requirements.
- Verify contractor licence before work starts.
- Obtain permit before backwater valve installation.
- Do not cover/enclose the valve before required inspection is complete.
- Keep original electronic invoices and valve records.
Questions homeowners ask
How much is the Toronto backwater valve subsidy?
Toronto states up to 80% of invoiced cost, maximum $1,600 per device, maximum two devices for eligible expanded-program backwater valve work.
Does Toronto require a permit?
Toronto’s subsidy instructions say to obtain a building permit before installing a backwater valve and request inspection once installation is complete.
Can BackwaterValves.ca submit the City application for me?
We can support documentation and guidance, but City application submission and approval remain governed by Toronto’s process.
Protect your basement from sewer backflow.
Book a focused backwater valve assessment for Toronto or Markham. We support indoor/outdoor installation planning, insurance records, and rebate documentation.