What it costs in the GTA
| Job | Typical range |
|---|---|
| Standard replacement window, installed | $500–$1,200 each |
| 10 windows | $8,000–$15,000 |
| Entry door, installed | $1,500–$6,000 |
| Patio sliding door, installed | $2,000–$6,000 |
Before HST. Bays, bows, custom sizes and full-frame installs cost more. Ranges where published GTA and Ontario sources overlap, checked November 2026. Not a quote.
Rebates, permits & rules
- Home Renovation Savings offers $100 per window or door opening for qualifying ENERGY STAR products, as part of its multi-upgrade path.
- Ontario's Home Renovation Savings program is scheduled to end November 30, 2026. If you're counting on a rebate, confirm it's still open, and that your contractor is a participating one, before you sign.
- Making an opening bigger, or adding one, needs a building permit.
- Signed the contract at your home? Ontario gives you 10 days to cancel most contracts signed there, for any reason.
What a complete quote includes
If any of these aren't on your quote, ask. Missing doesn't mean it's wrong, but it should be in writing.
- Number of windows and doors, room by room
- Frame material (vinyl, fibreglass, wood-clad)
- Glass: double or triple pane, low-E, argon
- ENERGY STAR rating
- Retrofit (insert) or full-frame install
- Insulation and sealing around each frame
- Interior trim and exterior capping
- Removal and disposal
- Rebate paperwork, if any
- Product warranty and installation warranty, in years
Watch out for
- A 'buy one get one' price that's only good today
- No mention of how the frames are insulated and sealed
- Lifetime warranty that only covers the glass
- Deposit over about a third before the windows are made
Replace all, or just the worst?
- Fogged glass between panes means a failed seal. Often the glass unit can be replaced without a new window.
- Drafts around the frame are often a caulking or insulation fix.
- Rotting frames or windows that won't open: replace.
- Doing the whole house at once usually lowers the per-window price.
5 questions to ask before you sign
- Is this a retrofit or full-frame install, and why?
- How do you insulate and seal around each frame?
- Who handles warranty calls: you or the manufacturer?
- Do these qualify for the Home Renovation Savings rebate?
- How long from order to install?
Ask AI first
Paste your quote into ChatGPT, Claude or Gemini with this prompt:
I'm a homeowner in [city], Ontario. Here is my window or door quote: [paste]. List what it includes and leaves out (count, frame, glass, ENERGY STAR, retrofit vs full-frame, insulation and capping, disposal, warranties), work out the price per window, flag anything vague, and give me 5 questions to ask before I sign. Don't guess a fair price.
Or skip the copy-paste: our free Quote Checker already knows what a windows & doors quote should include, and compares the price with real GTA ranges.
Common questions
How much does it cost to replace a window in Ontario?
Most standard replacement windows cost about $500–$1,200 each installed in 2026.
How much do 10 new windows cost?
Commonly about $8,000–$15,000 before HST, more for larger or specialty windows.
Are there window rebates in Ontario?
Home Renovation Savings offers $100 per qualifying window or door opening, and is scheduled to end November 30, 2026.