With some of the coldest winters of any Ontario city, Ottawa homeowners feel every draft — and every heating bill. Upgrading to energy-efficient windows pays off here, and a few rebate and financing programs can soften the upfront cost. Here's the 2026 picture. Programs and funding change often; confirm current eligibility before you buy.
Federal: Canada Greener Homes
The Canada Greener Homes Grant is no longer taking new applications, but the Canada Greener Homes Loan — interest-free financing up to $40,000 from Natural Resources Canada — can still help finance ENERGY STAR windows and other retrofits. Check NRCan for the current terms.
Ontario & Enbridge: Home Efficiency Rebate Plus (HER+)
Most Ottawa homes heat with natural gas, so the Enbridge Gas Home Efficiency Rebate Plus (HER+) program is usually the best route. It rebates eligible upgrades — including windows and doors — when done as part of a larger retrofit and paired with a pre- and post-project EnerGuide energy assessment.
How to qualify
- Book a registered EnerGuide assessment BEFORE work begins
- Choose ENERGY STAR windows rated for Ottawa's climate zone
- Use a qualified installer and keep every invoice
- Complete the post-retrofit assessment to lock in your rebate
Compare vetted Ottawa installers
A good local installer will help confirm which products and rebates apply to your project. See the 3 best windows and doors companies in Ottawa and get free quotes from all three.