Old windows are among the biggest sources of energy loss in Canadian homes — and one of the most impactful improvements you can make. In 2026, window replacement costs $400–$1,200 per window fully installed, with a whole-home replacement on a typical 2,000 sqft house running $12,000–$28,000. Here's the complete breakdown by window type, size, and city — plus how to access Canadian energy rebates that can offset $2,000–$8,000 of the cost.
| Category | Cost Range | Notes |
|---|---|---|
| Standard casement window (installed) | $500–$900 | Most popular window type in Canadian homes. Crank-operated, excellent seal. Best for cold climates. |
| Double-hung window (installed) | $400–$800 | Traditional style, both sashes move. Common in older Canadian homes being updated. |
| Picture/fixed window (installed) | $300–$700 | No opening mechanism — lowest cost. Used where views and light matter more than ventilation. |
| Sliding window (installed) | $400–$750 | Horizontal slider. Easier to clean than casement; slightly lower energy rating. |
| Bay or bow window (installed) | $2,000–$6,000 | Complex installation, custom sizes. Significant visual impact; requires interior structural header. |
| Sliding patio door (installed) | $1,500–$4,000 | Full door replacement including frame. Energy performance matters — insist on Energy Star rating. |
| Whole-home replacement (15–20 windows) | $12,000–$28,000 | Total installed cost including disposal and basic interior/exterior trim finishing. |
If your window frames are in good condition, an insert replacement slides into the existing frame and saves $200–$400 per window. If frames are rotting, damaged, or you want to change the rough opening size, full-frame replacement is required. Full-frame costs more but enables correct installation of new windows and can improve air sealing significantly.
Standard double-pane (Low-E argon fill) is the minimum for Canadian homes. Triple-pane adds $100–$200 per window and is worth it in colder provinces (Manitoba, Saskatchewan, northern Ontario, Alberta). Look for the Energy Rating (ER) number — higher is better. Canadian winters demand minimum ER 25; northern climates should target ER 35+.
Window installation labour is 30–40% of total cost. Toronto and Vancouver installers run 25–35% higher than smaller Canadian markets. Factory-direct installation (buying from the manufacturer who also installs) is often competitive — compare carefully against supply-plus-install quotes from local contractors.
The Canada Greener Homes Loan (up to $40,000 interest-free) covers window upgrades as part of a broader energy retrofit. Many provinces have additional programs — Ontario Home Energy Savings Program, BC CleanBC, Quebec Rénoclimat. An NRCan energy advisor audit ($300–$600) is required to access most federal programs.
A typical 2,000 sqft Canadian home has 15–20 windows. At an average installed cost of $600–$900 per window, a full whole-home replacement runs $12,000–$20,000 for standard casement and double-hung windows. Add bay windows, patio doors, or complex shapes and budget $20,000–$35,000. Always get at least 3 quotes — window pricing varies significantly between installers.
Yes — particularly in older homes with single-pane or poorly-sealed windows. Energy Star replacement windows can reduce heating and cooling costs by 15–25%, eliminate drafts, reduce condensation and mold risk, improve security, and add resale value. ROI at resale is typically 40–60% of replacement cost. The comfort improvement is often the biggest benefit homeowners report.
Yes. The Canada Greener Homes Loan (up to $40,000 interest-free) covers windows as part of a broader energy retrofit. Provincial programs stack on top: Ontario Home Energy Savings Program, BC CleanBC, Quebec Rénoclimat, and others. Total rebates for a full-home window replacement can reach $2,000–$8,000. An NRCan energy advisor audit is required for most federal programs.
Quality vinyl or fibreglass windows last 25–40 years in Canadian climates. Wood-clad windows can last 30–50 years with maintenance. Look for at least a 25-year warranty on the sealed unit (the glass package) and 10+ years on hardware. Grey-market or no-name vinyl windows often fail within 10–15 years — the sealed unit fogs and loses its insulating value.
Replace windows early in any renovation — ideally before drywall and interior finishes. New windows may require interior trim work and drywall patching. Replacing windows after completing interior finishes risks damage to walls, trim, and flooring during installation. In a whole-home renovation, windows typically go in during the rough-in phase, before insulation and drywall.
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