Ontario attic insulation rebate 2026: up to $1,250, rules and the November 30 deadline

Official sources checked October 12, 2026.

The Ontario attic insulation rebate pays back 50% of what you spend on attic insulation, after tax, up to $1,250 for an attic and up to $750 for a cathedral ceiling or flat roof. It comes from the Home Renovation Savings program run by Enbridge Gas and Save on Energy, needs no energy assessment, and the work must be done by a participating contractor and completed by November 30, 2026.

To estimate your own rebate from your current insulation level and your cost, use our attic insulation rebate calculator.

Ontario attic insulation rebate at a glance

These are the maximums in the program’s attic stream, where you upgrade the attic alone. Your actual rebate is the lower of the maximum and half of your after-tax insulation cost. Attics already above R-35 are not in the table, so they do not qualify in this stream. Source: Home Renovation Savings attic page and the attic stream’s Additional Program Eligibility Requirements (version dated January 2026).

How the rebate is calculated: half your cost, up to a cap

The rule in the program documents is short: the rebate is 50% of the total attic insulation cost after tax, up to the maximum for your band. The band is set by the insulation level the contractor finds at the in-home visit, not by what you think is up there. If your home has both an attic and a cathedral ceiling or flat roof, each part is calculated separately and the two rebates are added.

Four examples show how the Ontario attic insulation rebate works in practice. The first two use our own round numbers to illustrate the rule; the last two are the examples published in the program documents.

Two things follow from the 50% rule. A low quote does not cost you rebate money as long as half of it stays under the cap, and a high quote does not earn you more once you pass the cap. In the first example, the full $1,250 would need an after-tax invoice of at least $2,500. Above that, every extra dollar is yours to pay.

If you want a feel for insulation prices and R-values per inch before you call contractors, our guides to attic insulation costs (in French) and insulation types are written for Quebec, but the materials are the same (in French).

Once you know your attic is covered, compare how wall insulation works: our guide to spray foam vs batt insulation explains R-value per inch, costs and where each one fits in an Ontario house.

Deadline: work completed by November 30, 2026

For the Ontario attic insulation rebate, this is the date that matters most right now. Under the attic stream rules, the insulation must be installed by November 30, 2026, and the contractor must enter your file in the program’s tracking system by December 31, 2026. A file that misses either date can be closed permanently. The stream opened on August 5, 2025.

Funding is also limited. The participant terms say rebates are paid until the money is fully allocated, and that the program can change the rules or the rebate amount at any time before your work is finished. The amount that applies to you is the one in effect when the work is completed, so a booking alone does not lock in a number.

Who qualifies

• You own the home. Tenants cannot apply; a landlord can apply for a rented home, and an owner can apply for more than one property if each one qualifies.
• You heat mainly with a natural gas furnace or boiler supplied by Enbridge Gas, or your home is connected to the Ontario electricity grid and heated mainly with electricity, oil, propane or wood. Your heating has to meet this test when the work is completed.
• The home is a detached or semi-detached house, a row house, a townhome that is not stacked, or a mobile home on a permanent foundation.
• 100% of the roof assembly is insulated. The roof assembly means the attic, cathedral ceiling, flat roof or any combination of them, whether or not you can get into every part.
• New insulation goes where the old insulation is. If the existing insulation is on the attic floor, the new layer must go on the attic floor too.

Homes and situations that do not qualify

• Homes occupied for less than six months, and stacked townhomes.
• Duplexes, triplexes, low-rise apartment buildings and other buildings built as multi-unit homes. A single-family house with a basement or in-law suite added later can qualify if the whole attic is done and the house has central heating.
• Cornwall Electric customers, unless the home is heated mainly with Enbridge natural gas, because Cornwall Electric is connected to the Hydro-Québec grid.
• Insulation you install yourself, or work done by a contractor who is not on the participating list.
• Any work done before the contractor’s in-home visit.

Previous rebates and stacking

If your home already received an attic insulation rebate through Home Efficiency Rebate Plus, Home Efficiency Rebate or the Home Renovation Savings assessment stream, you cannot get a second one for the attic. You can still apply for other upgrades. You also cannot combine this rebate with another Enbridge Gas, Save on Energy or Government of Ontario incentive for the same work. A rebate from another utility or a municipality is possible, but you must tell your contractor, and all rebates combined cannot exceed 50% of the after-tax cost.

How to apply, step by step

1. Fill in the eligibility form on the Home Renovation Savings attic page. This is the pre-registration step, and it gives you the list of participating insulation contractors.
2. Choose a contractor from that list and book the in-home visit. Nothing should be installed before this visit.
3. Sign the attic stream terms and conditions and return them to the contractor or the program.
4. Give the contractor a copy of your property tax bill and keep copies of every document, including the after-tax invoice.
5. The contractor installs the insulation by November 30, 2026, completes your application and enters the file in the program’s system.
6. The rebate is paid by cheque. Deposit it within six months: after that it goes stale, and you can ask for a replacement only once, within eight months of the original date.

Participating contractors: a closed list

Only contractors on the program’s pre-approved list can deliver the Ontario attic insulation rebate, and the program says registrations for new contractors are closed. That means your usual contractor cannot simply sign up to get you the rebate. On October 12, 2026, the eligibility form on the program website listed six participating companies. RénoClair has no link with any of them. Use the program’s own list for your area, since coverage varies by region and the list can change.

To be on the list, a contractor must hold a valid Ontario business licence, have been in business for at least two years, carry general liability insurance, have completed technical training and offer at least a one-year labour warranty. Ask for the warranty in writing.

Attic alone or a bundle with an energy assessment?

Home Renovation Savings has a second route. You start with a home energy assessment, do at least two upgrades, then have a follow-up assessment. The attic amounts are higher there, but the rules are different.

To compare all the program’s rebates, including heat pumps, solar, windows and the bonus for three upgrades, see our complete guide to the Home Renovation Savings program.

For an attic-only job, the attic stream is simpler and faster. The assessment stream makes sense when you were already planning a second upgrade: for example, an attic at R-12 or less brought to R-50 ($1,500) plus R-10 to R-22 added to all of the basement walls ($900) plus the $600 assessment rebate would total $3,000, before any bundle bonus. The tight dates in late 2026 are the catch, because two assessments and two jobs have to fit in a few weeks. Details are on the program’s assessment page. If you are also thinking about a heat pump, see our Ontario heat pump rebate guide and rebate calculator.

Planning a heat pump water heater as your second upgrade? Our heat pump water heater rebate guide shows how its $500 combines with an attic bundle in a worked example.

Before you sign: a 10-point checklist

1. You have submitted the pre-registration form yourself on homerenovationsavings.ca, not through a link someone sent you.
2. The contractor appears on the program’s participating list for your area.
3. The existing R-value found at the in-home visit is written down. It decides your rebate band.
4. The quote covers 100% of the roof assembly, including any cathedral or flat sections.
5. The new insulation goes in the same place as the old (attic floor or attic ceiling).
6. The quote states the final R-value: at least R-50 for an attic, R-20 or R-28 for a cathedral ceiling or flat roof.
7. The price is shown after tax, since the 50% is calculated on the after-tax total.
8. The installation date leaves a margin before November 30, 2026.
9. You have checked whether your address already received an attic rebate under HER, HER+ or the assessment stream.
10. You have the one-year labour warranty in writing.

Common mistakes that cost the rebate

• Starting before the visit. Any insulation installed before the contractor’s in-home visit is not eligible.
• Doing only part of the attic. In this stream the whole roof assembly must be insulated.
• Hiring a contractor who is not on the list. Registrations are closed, so a contractor cannot join to rescue your file.
• Booking too late. Work finished on December 1, 2026 does not qualify.
• Assuming the full $1,250. If your after-tax invoice is under $2,500, the rebate is half the invoice.
• Letting the cheque sit. After six months it goes stale, and it can be reissued only once.

Insulating the attic is only part of the envelope: for the walls, rim joist and slab below, see our guide to basement insulation in Canada, which covers materials, R-values and the Ontario rebates for each.

Not sure how much insulation your attic really has? An EnerGuide evaluation measures it, and the Home Renovation Savings assessment stream pays up to $600 toward the audit once you complete two upgrades. Our home energy audit Ontario guide covers the cost, the rules and the 2026 deadlines.

To estimate the cost of the work itself, use our attic insulation cost calculator (area and target R-value).

Frequently asked questions

The bottom line

If your attic is at R-35 or less and you own a qualifying Ontario home, the Ontario attic insulation rebate can cover half the job, up to $1,250. Pre-register first, choose a contractor from the program’s list, make sure the whole roof assembly is done, and get the work finished well before November 30, 2026. If you were planning two or more upgrades anyway, compare the bundle route before you sign. Insulation and air sealing also keep heat out of the attic in winter, which is the main way to stop ice dams on your roof.

Sources

• Home Renovation Savings, Attic insulation (rebate amounts, eligibility, steps, contractor list status), checked October 12, 2026.
• Home Renovation Savings, Terms and conditions page: Attic Program Stream Additional Program Eligibility Requirements (version January 2026) and Participant Terms and Conditions (version December 2025), checked October 12, 2026.
• Home Renovation Savings, Help and support (attic questions, stacking rules), checked October 12, 2026.
• Home Renovation Savings, Energy assessment required upgrades, and the Assessment Program Stream Additional Program Eligibility Requirements (version November 2025), checked October 12, 2026.