Detailed cost breakdown for windows renovation in London, Ontario.
In London, Ontario, a standard-quality windows renovation typically costs between $5,463 and $12,563 in 2026 — prices are near the Canadian average, with a local cost index of 95%. Expect around 1 to 3 days per window of work and a 70–80% return on investment at resale. Freeze-thaw events are less extreme but rain is heavier — prioritize gutters, grading, and flashing details to keep water away from the foundation.
Budget Range
$3,823 - $8,793
Average Cost
$5,463 - $12,563
Premium Range
$8,740 - $20,102
| Category | Low Estimate | High Estimate |
|---|---|---|
| Windows | $2,850 | $6,412 |
| Installation | $1,425 | $3,206 |
| Interior Trim | $570 | $1,425 |
| Weatherstripping | $190 | $475 |
| Old Window Disposal | $285 | $665 |
| Permits | $143 | $380 |
| Total | $5,463 | $12,563 |
Triple-pane has become increasingly standard in London retrofits — the snowbelt cold and frequent -20°C+ cold snaps make double-pane low-e a marginal payback proposition. Casa Bella Windows, Centra, and Verdun dominate the local market at $1,100–$1,900 per opening installed. A typical 1,500 sq ft London bungalow has 11–15 windows, putting full replacement in the $19,000–$32,000 range. The Canada Greener Homes rebate (up to $5,000) stacks with the Enbridge Home Efficiency Rebate for gas customers. Wortley Village heritage approval applies to lite-style on street-facing windows for designated properties; most homes here don’t need that step.
Window replacement in Canada should prioritize energy efficiency — look for ENERGY STAR® certified windows rated for your climate zone. Double-pane is minimum; triple-pane is recommended for zones 2 and 3 (most of Canada). Argon or krypton gas fill between panes adds 10–15% to cost but significantly improves insulation. Replace all windows at once if possible — contractors offer better per-window pricing for full-house jobs.
Window frame material is the largest cost factor: vinyl ($400–800/window), fiberglass ($600–1,200), aluminum-clad wood ($800–1,500), and full wood ($1,000–2,000+). Unusual sizes, bay/bow windows, and casement styles cost 30–100% more than standard double-hung. Installation complexity (brick vs. wood siding, second-floor access) affects labour costs.
💡 Pro Tip
Check for federal and provincial rebates before purchasing — the Canada Greener Homes Grant and provincial programs can cover $125–250 per window for ENERGY STAR® upgrades, potentially saving $2,000–$5,000 on a full-house replacement.
London, Ontario offers renovation costs 15–20% below Toronto, making it one of the best-value markets in the province. The city's mix of Victorian homes in Old North and Wortley Village alongside newer suburban developments provides diverse renovation opportunities. Western University's presence creates steady demand for rental property upgrades. Contractor availability is generally good with 2–4 week lead times.
The City of London requires permits for structural, plumbing, electrical, and HVAC work. Applications are processed through the Development and Compliance Services division. Simple residential permits are issued within 10 business days. London offers a pre-consultation service for complex projects.
London sits in southwestern Ontario's snow belt, receiving 194 cm of snow annually — significantly more than Toronto. This heavy snowfall means roofing must handle greater snow loads, and ice dam prevention is critical. The humid summers require proper ventilation in any renovation, especially basements.
Renovation permits in Ontario are issued by the local municipality under the Ontario Building Code. Most kitchen, bathroom, and basement permits are reviewed within 10 business days for residential work, though Toronto and Mississauga frequently run longer queues. Bill 23 (More Homes Built Faster Act) has streamlined approvals for additional residential units, but plumbing and electrical work still requires a separate ESA inspection. Note for basement apartments: if the home was built within the last 5 years, the OBC requires a separate HVAC system serving the apartment unit only — adds $5K-$10K and noticeably extends the timeline.
Ontario is two climates stacked on top of each other. Southwestern Ontario's snowbelt corridor (London, Kitchener, Owen Sound area) receives 160–200+ cm of snow annually from lake-effect events off Lake Huron — significantly more than Toronto's 122 cm — which puts higher snow loads on roofs and demands more aggressive ice-dam prevention. Meanwhile, properties along the Don, Humber, and Credit River watersheds across the GTA face the opposite challenge: spring flood events have become noticeably more severe over the past decade, and many home insurers now require backwater valves and elevation certificates before binding flood coverage on lower-elevation lots.
Ontario's housing pressure has made secondary suites a high-demand renovation: Bill 23 allows up to three units on most residential lots as-of-right, fuelling a steady basement-conversion market. Contractor availability is tightest in the GTA from April through October, so booking 6–10 weeks ahead is the norm for mid-to-large projects.
In 2026, a windows renovation in London costs between $3,823 (budget) and $20,102 (premium). The average standard cost ranges from $5,463 to $12,563.
A windows renovation typically returns 70–80% at resale in Canada. The exact figure depends on material choices, the current state of the London housing market, and quality of execution.
The three most common options in Canada: a variable-rate HELOC against your home equity, a fixed-rate renovation loan from your bank (5–10 year terms), or a mortgage refinance if you have substantial equity. For projects under $15,000, a 0% balance-transfer credit card can bridge 12–18 months. Avoid contractor-offered financing — those rates often exceed 12%.
Demolition, painting, baseboards, and small fixtures are jobs many homeowners take on themselves. Avoid touching plumbing, electrical, or gas without permits and inspection — most municipalities prohibit it, and bad workmanship can void your home insurance. On a typical London project, DIY can shave 10–20% off the total.
The City of London requires permits for structural, plumbing, electrical, and HVAC work. Applications are processed through the Development and Compliance Services division. Simple residential permits are issued within 10 business days. London offers a pre-consultation service for complex projects.
📖 Complete guide
Read our complete national guide to windows costs