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Insulation Rebates in Ontario (October 2026): The Standalone Attic Rebate, the Assessment Path, the Amounts, the Conditions and the Participating-Contractor Catch
Insulation & Air Sealing
Insulation Rebates in Ontario: Up to $1,250 for the Attic Without an Audit, More With One, and the Three Conditions That Catch Most People
There is one insulation rebate in Ontario in October 2026 that does not need an energy assessment first, and it is for the attic. Everything else, walls, basement, air sealing, goes through an EnerGuide evaluation before and after the work and takes three to six months. The amounts are real and the program has paid out plenty, but the conditions are exactly the kind that turn “up to $1,250” into zero: the attic has to start low enough, the contractor has to be on a closed list, and the house has to have been yours for six months. This page has the facts as I verified them on the program site this month, and the program site is where you check them again before you sign anything, because the program publishes no end date.
The standalone attic rebate, no assessment
| Where the attic starts | Where it has to end | Up to |
|---|---|---|
| R-12 or less | R-50 or more | $1,250 |
| Above R-12, up to R-25 | R-50 or more | $1,000 |
| Above R-25, up to R-35 | R-50 or more | $800 |
| Cathedral or flat roof, R-25 or less | R-28 or more | $750 |
| Cathedral or flat roof, R-12 or less | R-20 or more | $650 |
The rebate is 50% of the after-tax cost of the attic work, up to the cap. An attic already above R-35 gets nothing, and 100% of the roof assembly has to be insulated; half an attic does not qualify. The program amounts above are the ones published in October 2026 and they are the only ones to plan on.
Work it on the 1,200 sq ft attic from the cost page: top-up from R-20 to R-60, air sealing, baffles and the hatch come to $4,820 before HST and $5,447 with. The attic started above R-12 and under R-25, so the cap is $1,000. Half of $5,447 is $2,723, which is more than the cap, so the rebate, if everything else qualifies, is $1,000, paid to you afterward. On a smaller attic where half the after-tax cost is under the cap, you get the half. Nothing comes off the invoice; you pay the contractor the full $5,447 and apply.
The three conditions that catch people
- The contractor has to be on the participating list. The program has a short list of participating contractors, six names in October 2026, Great Northern Insulation and Home Depot among them, and enrolment is closed, so a contractor who is not on it cannot get on it. The best attic installer in your county, if he is not on the list, cannot get you the rebate however well he blows. Ask before you sign, and look at the list yourself rather than taking the yes on the phone.
- The house has to be yours and occupied for more than six months, and it cannot have had an attic rebate before from Enbridge, Save on Energy or the province. A house you bought in June does not qualify in October. A house that got the 2019 attic rebate does not qualify again.
- You have to heat the right way. Ontario homeowners heating with natural gas on an Enbridge account, or with electricity, oil, propane or wood on the grid. Most houses qualify; a cottage with no hydro account does not.
The attic also has to start low enough, which is where the depth measurement matters. A contractor who tells you the attic is “about R-12” when the ruler says 6 in. of settled cellulose, about R-20, is either guessing or steering you to the bigger cap, and the program checks with photographs. The attic R-value page lets you read the attic yourself before anyone else does.
The assessment path: more money, more time
With an EnerGuide evaluation before the work and another after it, the attic amounts go up: $1,500, $1,200 or $900 by the same starting bands, and $780 for a cathedral roof. More to the point, this is the only path to a rebate on anything that is not an attic. Bundled insulation, walls, basement, exposed floor and air sealing done with the attic, pays $1,250 to $7,700, and the figure is set by the evaluation, not by the invoice. There is no standalone basement rebate and no standalone wall rebate; a basement contractor who promises one is promising something the program does not offer.
The evaluation itself is $500 to $800 and includes the blower door test, and the home energy audit page covers what the evaluator does in the house. Pre-approval has to come through before the work starts; a full cycle, evaluation, approval, work, second evaluation, payment, runs three to six months. If the basement is wet in March and you want it finished by June, the rebate is not on the schedule.
Dates: funding is reported as running through November 30, 2026, and the program publishes no end date and can close earlier if the money runs out. A quote dated October that counts on a rebate paid in February is counting on a program that has not promised to be there in February. The program page on this site has the mechanics and will be updated when the program changes.
Why I never show a rebate as money off
Every attic calculator on this site, including mine, shows the rebate as a separate line labelled “if you qualify”, and the invoice number above it never moves. Four reasons. The rebate is paid after, not deducted; you fund the whole job. The contractor may not be on the list. The attic may start higher than the salesman said. And the program may close between your signature and your application. A quote that reads “$5,447 less $1,000 rebate = $4,447” is a quote with a $1,000 assumption in it that the contractor does not stand behind. I have watched a homeowner budget to the rebate and then find out the installer was not a participant; the attic was fine, the arithmetic was not.
The rebate is also not the reason to do the attic. An attic at R-20 going to R-60 on a Simcoe propane bill saves real money every winter, with or without the $1,000, and the energy savings page does that arithmetic without the brochure. If the rebate comes, it shortens the payback; if it does not, the attic is still the best insulation money on the house.
What the paperwork wants
The program asks for before and after photographs of the attic with the depth visible, the contractor invoice showing the area, the product, the starting and finished R-value and the HST, proof of the heating account, and a participating contractor number. Have the contractor put the starting R and the finished R on the invoice in writing, measured, not estimated; a quote that says “to R-50” and an invoice that says “blown cellulose, 1,200 sq ft” with no R on it is a rejected application waiting to happen. Photograph the depth ruler yourself before the truck arrives and again after it leaves. The contract checklist in the contractors section has the rebate lines a contract should carry.
Questions people ask
Is there an insulation rebate in Ontario in 2026?
Yes, through the Home Renovation Savings program as of October 2026. The attic rebate needs no assessment: up to $1,250, $1,000 or $800 depending on where the attic starts, taken to R-50 or more, 50% of the after-tax cost up to the cap. Walls, basement and air sealing need an EnerGuide evaluation before and after and pay $1,250 to $7,700 bundled with the attic.
Can any contractor get me the attic rebate?
No. The work has to be done by a contractor on the program’s participating list, six names in October 2026, and enrolment is closed to new contractors. A contractor not on the list cannot get you the rebate however good his work is. Check the list on the program site, not the contractor’s word.
Is there a basement insulation rebate in Ontario?
Not on its own. Basement, wall, exposed floor and air sealing rebates exist only on the assessment path, bundled with the attic, with an EnerGuide evaluation before and after and pre-approval before work starts.
When does the Ontario insulation rebate end?
Funding is reported as running through November 30, 2026. The program publishes no end date and can close earlier. Check the program site the week you sign, and do not count the rebate in the budget until it is in your account.
Does the rebate come off the invoice?
No. You pay the contractor in full, including HST, then apply with the photographs and invoice, and the program pays you afterward if the house, the attic and the contractor all qualify. No honest quote shows the rebate as a deduction.
See the rebate as its own line
The attic insulation cost calculator prices the attic, adds HST, then shows the rebate you might qualify for as a separate line with its conditions, which is the only honest way to show it. If a quote in your hand already has the rebate baked into the price, the $99 review will pull it back out and tell you what the job really costs.
Sources and further reading
- Home Renovation Savings: the Enbridge and IESO program page: streams, eligibility, participating contractors and current amounts; check it before you sign anything.
- Home Renovation Savings: attic insulation without an assessment: the standalone attic rebate: starting and target R-values, caps, the participating-contractor rule and who is excluded.
- EnerGuide home evaluations: Natural Resources Canada: what a registered energy advisor does, the blower door test and the rating that the assessment-path rebates depend on.
