How much you get
Local financing note for Cambridge
Cambridge is GrandBridge Energy territory, and that's the one detail that actually changes your financing options here versus a lot of other Ontario cities: RetrofitWR's low-interest loan (up to $40,000 at 2.5% fixed over 10 or 15 years, repaid through your electricity bill) was confirmed for GrandBridge customers when the program launched in spring 2026. On top of the free Energy Coach every Region of Waterloo resident gets, Cambridge homeowners can use that loan to cover the upfront cost of this upgrade instead of paying out of pocket.
Why this one needs an assessment
Windows and doors bundle into the assessment-required path alongside insulation, water heater, and air sealing. You need at least 2 of those upgrades — completing 3+ earns an extra $500 bonus.
How to claim it
- Book an initial home energy assessment with a registered energy advisor ($600, refunded later)
- Get your custom report
- Complete the window/door replacement plus at least one other qualifying upgrade
- Book a follow-up assessment
- Rebate arrives by mail within 60 days
Browse HVAC, solar, and electrical installers near Cambridge →
Common questions
Are window and door rebates available in Cambridge?
Yes, through the same provincial program as the rest of Ontario — ENERGY STAR-rated windows and doors count toward the assessment-required retrofit path. Cambridge homeowners have an edge on financing the upfront cost: RetrofitWR's confirmed loan for GrandBridge Energy customers can cover it, on top of the free Energy Coach.
Do all new windows qualify for the rebate in Cambridge?
No, they need to meet ENERGY STAR's rating for your climate zone. That requirement is the same whether you finance the job out of pocket or through RetrofitWR's loan.
Your utility: GrandBridge Energy
Cambridge's electricity comes from GrandBridge Energy, a utility that's only a few years old under that name — it formed in 2022 when Cambridge and North Dumfries Hydro (branded Energy+) merged with Brantford Power. If you're old enough to remember a bill from "Cambridge and North Dumfries Hydro," it's the same company under new ownership structure and a new name. The province-wide rebate amount for windows and doors doesn't move based on who bills you, but GrandBridge is the number to call if your installer flags a panel or service-capacity issue mid-project.
What Cambridge's winters mean for this upgrade's payback
Cambridge sits inland from the Great Lakes moderation that softens winters closer to the shoreline, so it runs colder on average than Hamilton or Burlington despite being roughly the same distance north — the 10-year average January daily low (2015-2024) is -8.6°C, with a coldest recorded day of -31.3°C. That inland cold is the same reason the Waterloo Region as a whole tends to lean harder into insulation and window upgrades than the shoreline cities do.
Next steps
View all Cambridge rebate programs → or check the official Home Renovation Savings Program site → for the current source of truth.