What is the Toronto backwater valve subsidy, and who qualifies?

What is covered

Several items, each with its own cap per property. A backwater valve, which stops sewage flowing back into the basement during a storm surge. A sump pump with an alarm, which moves groundwater out, and a battery backup to keep it running in an outage. Severing and capping the connection between the foundation drain and the sewer. And a home plumbing assessment that works out which of these a house needs.

The City expanded the program in 2026, for work completed from November 12, 2025, and the caps had been revised more than once before that. Read the current figures off the City's own page before quoting anything to a customer.

The conditions people miss

Reimbursement is not automatic. The applicant has to be the registered owner of a single-family home, duplex, triplex, or fourplex, with the downspouts disconnected. The contractor and any subcontractors need a valid City of Toronto business licence of the right type at the time of the work, and the City denies funding when they do not have one. A backwater valve also needs a building permit and an inspection, and the application has to go in within two years of the work.

Why a Toronto plumber should have a page about it

Homeowners search for the subsidy by name, usually in the week after a storm, and the results are dominated by the City's own page and by news coverage. A plumber with a plain page explaining the program, the licence and permit steps, and what the install involves picks up searches with immediate intent. The page has to stay current, because one quoting the old caps does more harm than good.