How Much Does Window Replacement Cost in Ontario?
Whole-home window replacement in Ontario typically costs $9,000 to $20,000 for vinyl windows — about $600 per window installed. Fiberglass windows run $15,000 to $35,000 (from $800+ each), and wood windows start around $1,000 per window. Your total depends on how many openings you replace, the window styles, and the glass package.
Window Cost by Material
What Affects the Price
- Number of openings — whole-home projects lower the per-window install cost.
- Window style — casement, awning, and bay/bow windows cost more than sliders and single-hungs.
- Glass package — triple-pane, low-E coatings, and argon fill add cost but improve efficiency.
- Installation type — full-frame replacement costs more than a retrofit (insert) install but is better when frames are rotted.
Rebates Can Lower Your Net Cost
In 2026, ENERGY STAR® windows may qualify for $100 per rough opening through Ontario's Home Renovation Savings Program. Read our Ontario window & door rebate guide and explore financing options to spread the balance over monthly payments.
See our full window replacement service for materials, styles, and warranty details.
Related cost guides
Frequently Asked Questions
How much does it cost to replace windows in Ontario?
Whole-home window replacement in Ontario typically costs $9,000 to $20,000 for vinyl windows, or about $600 per window installed. Fiberglass windows run $15,000 to $35,000 (from $800+ each), and wood windows start around $1,000 per window.
How much is one replacement window installed?
Expect about $600 for a standard installed vinyl window, $800 or more for fiberglass, and $1,000+ for wood. Price varies with size, style (casement, awning, bay), and glass package.
Are vinyl or fiberglass windows better value?
Vinyl offers the best up-front value and strong energy performance for most Ontario homes. Fiberglass costs more but is stronger, holds paint, and handles temperature swings well, making it a good long-term choice for larger or premium windows.
Do new windows qualify for rebates in Ontario?
Yes. In 2026, ENERGY STAR windows can qualify for $100 per rough opening through the Home Renovation Savings Program. See our Ontario window & door rebate guide for details.
Do you offer free window quotes in Kitchener-Waterloo?
Yes. D&D Exterior Finishing provides free written window replacement quotes across Kitchener, Waterloo, Cambridge, Guelph, and surrounding areas.