Window Replacement Cost in Ontario (2026 Guide)
New windows are one of the few upgrades that pay you back twice. Lower heating and cooling bills every month, plus a noticeable lift in home value when you sell. They also fix drafts, condensation, and noise that older windows let through.
Window replacement in Ontario runs $500 to $1,500+ per window installed, depending on size, style, and frame material. A full-home replacement of 10 to 15 windows typically runs $8,000 to $25,000. Here is the full cost picture and what to look for.
Window Replacement Cost in Ontario
| Window type | Installed cost (per window) |
|---|---|
| Single-hung or double-hung | $500 to $900 |
| Slider | $500 to $1,000 |
| Casement (cranks open) | $700 to $1,400 |
| Bay or bow window | $2,500 to $5,000+ |
| Picture (fixed, no opening) | $600 to $1,200 |
| Basement window | $400 to $1,000 |
| Full-home replacement (10 to 15 windows) | $8,000 to $25,000 |
Cost depends on size, the frame material (vinyl, fibreglass, wood), the glass package (double vs triple, low-E, argon-filled), and how complex the install is.
What Drives the Price
Frame Material
- Vinyl: most popular, lowest cost, good performance, 25 to 30 year lifespan.
- Fibreglass: stronger and more durable, mid-to-high cost, 30 to 50 year lifespan.
- Wood: best aesthetic, premium cost, requires maintenance, 30+ years.
- Aluminum: durable but worst insulator, mostly for commercial.
Glass Package
- Double pane with low-E and argon: the standard today.
- Triple pane: better insulation, better noise reduction, 15 to 25 percent more cost.
- Low-E coating: reflects heat, lowers UV damage.
- Tempered glass: required by code in certain locations (near doors, in showers).
Window Style
Casement windows (crank open) cost more but seal tighter and let in more air. Hung and slider windows are the cheapest. Bay and bow are the most expensive.
Energy Savings
Modern Energy Star windows can cut heating and cooling bills by 10 to 25 percent compared to single-pane or old double-pane windows. For an Ontario home paying $300 per month in winter heat, that is $30 to $75 monthly. Payback comes from a combination of energy savings, improved comfort, and resale value.
Pairs naturally with attic insulation for compounding savings. See our guide on attic insulation cost.
Rebates and Incentives
The Canada Greener Homes Loan offers up to $40,000 interest-free for window upgrades that meet Energy Star Most Efficient. Many Ontario utility programs also offer rebates. Confirm eligibility and apply before booking the install.
Signs You Need New Windows
- Drafts even when windows are closed.
- Condensation between panes (seal has failed).
- Difficulty opening, closing, or locking.
- Visible damage to the frame (rot, warping).
- High heating and cooling bills.
- Outside noise that should not be audible.
- Single-pane glass (modern code requires double minimum).
- Original windows in a home built before 1990.
How Long the Install Takes
A single window replacement takes 30 to 60 minutes. A full-home replacement of 10 to 15 windows is usually 1 to 2 days. Lead time on ordering custom windows is 4 to 8 weeks after measurement.
Tips When Getting Quotes
- Get 3 quotes for comparison.
- Confirm Energy Star rating on the windows.
- Ask about the frame material (vinyl, fibreglass, wood).
- Confirm the glass package (double vs triple, low-E, gas-filled).
- Ask about the warranty on glass, frame, and labour.
- Confirm if old windows and trim will be removed and hauled away.
- Check who handles permits if required.
Window Replacement FAQ
How much does window replacement cost in Ontario?
Single windows run $500 to $1,500+ installed. A full home of 10 to 15 windows typically runs $8,000 to $25,000.
Are new windows a good investment?
Yes. They cut energy bills 10 to 25 percent, improve comfort and noise, fix drafts, and add resale value. Payback varies by home but is one of the higher-ROI upgrades.
Should I get double or triple pane?
Double pane with low-E and argon is standard and works well in most homes. Triple pane is worth it for noisy locations or homes targeting maximum energy efficiency.
Are there rebates for new windows?
Yes. The Canada Greener Homes Loan offers up to $40,000 interest-free for Energy Star Most Efficient windows. Many Ontario utilities also offer rebates.
How long do new windows last?
Vinyl 25 to 30 years. Fibreglass 30 to 50 years. Wood 30+ years with maintenance. Glass seal usually warrantied for 15 to 25 years.
The Bottom Line
Budget $500 to $1,500+ per window or $8,000 to $25,000 for a full home. Choose Energy Star double-pane with low-E and argon as the standard. Check for rebates before booking. New windows cut bills, improve comfort, and lift home value.
Drafty windows or sky-high energy bills?
Peace of Mind Interiors handles window replacement across Oakville. 0% financing available. Call (905) 484-7785 or request a free quote.