Ontario's current window and door incentive is the Home Renovation Savings™ program, offering up to $100 per rough opening when you bundle two or more eligible energy upgrades, with ENERGY STAR® certified products required and a pre-work energy assessment as part of the process. That's the program actually active right now. Several other programs that used to dominate search results for "Ontario window rebate," including the Canada Greener Homes Grant and the Enbridge Home Efficiency Rebate Plus, are closed to new applicants. If a quote or an article assumes one of those is still available, it hasn't been updated recently.
What the current program actually requires
Home Renovation Savings™ isn't a blanket discount on any window purchase. Three conditions apply: the replacement windows or doors need to be ENERGY STAR® certified, the project needs to bundle at least one additional eligible energy upgrade alongside the windows, such as attic insulation, and a pre-work energy assessment needs to happen before the installation begins. Skip any one of those three, and the rebate doesn't apply, regardless of how efficient the windows themselves are.
What replacing 10 windows actually costs, with the rebate applied
Using typical Ontario per-window pricing, retrofit installation in the $450 to $700 range and full-frame in the $600 to $1,200 range depending on the home, 10 windows lands somewhere between roughly $4,500 and $12,000 before any rebate, with the wide range reflecting installation method and window style far more than any single "average" figure would suggest. Applying the Home Renovation Savings™ rebate at up to $100 per rough opening across 10 windows takes up to $1,000 off that total, assuming the bundling and assessment requirements are met. That's a real, calculable number, not a vague "save up to 30%" claim: it's a fixed amount per opening, multiplied by how many openings actually qualify.
Why bundling matters more than most homeowners realize
The requirement to bundle windows with at least one other eligible upgrade is often the detail that catches people off guard. A homeowner planning only a window replacement, with no other upgrade planned, won't qualify for the window rebate on its own under the current program structure. This is exactly why it's worth discussing attic insulation alongside a window project, even for homeowners who weren't initially planning to touch their attic: pairing the two doesn't just add a second rebate opportunity, it's what unlocks the window rebate to begin with under current program rules.
Program eligibility note: rebate eligibility and approval depend on the current program requirements and the program administrator, and program terms can change. The figures above reflect Home Renovation Savings™ as currently structured; confirm current details before finalizing a project budget around them.
