Windows & Doors Contractors in London
6 verified windows & doors contractors in London. Compare ratings and reviews.
Windows & Doors in London — What You Need to Know (2026)
Looking for the best windows & doors contractors in London? Our directory lists 6 verified windows & doors companies in London, Ontario, ranked by Google reviews and ratings. Compare windows & doors contractors near London to find the right fit for your project.
Windows & Doors Cost in London (2026 Ontario Rates)
Windows & Doors cost in London varies by project scope, materials, and contractor experience. Ontario rates in 2026 reflect rising material costs and strong demand across the Golden Horseshoe. Get at least three written quotes from windows & doors companies in London to ensure competitive pricing. Ask for a detailed breakdown of labour, materials, permits, and cleanup.
What to Look for When Hiring a Windows & Doors Contractor in London
When hiring a windows & doors contractor in London, verify their credentials before signing. Check for WSIB (Workplace Safety and Insurance Board) clearance at wsib.ca, confirm liability insurance coverage of $2 million or more, and ask for references from recent projects in London or nearby communities. Licensed, insured, and Ontario Building Code compliant contractors protect your investment and your property.
Best Time for Windows & Doors Work in London
Timing matters for windows & doors work in London. Ontario's seasonal weather patterns affect both scheduling and pricing. Book your windows & doors project during shoulder seasons (spring or fall) for better availability and potential savings. Emergency services are available year-round, though expect premium rates during peak demand periods.
Every windows & doors contractor in our London directory has a verified Google Business Profile with real customer ratings and reviews. Our marketing gap analysis helps you identify established companies with strong reputations versus newer entrants that may lack adequate documentation.
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Data from 6 verified Google Business Profiles
Showing 6 of 6 windows & doors businesses in London
London Door and Window
London Glass Co.
Prestige Windows & Doors
London Glass Pro
Windows Plus Inc.
Glass Masters Ltd.
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Hiring a Windows & Doors in Ontario
$8,000
Spring through fall (Apr-Nov)
What to Look For
- Energy Star certified products
- Manufacturer warranty (minimum 20 years)
- Professional installation with proper flashing
Tips Before You Hire
- 1.Compare Energy Star ratings between quotes
- 2.Ask about the Greener Homes Grant for window upgrades
- 3.Verify installation includes caulking and insulation
Windows & Doors Cost Guide — London (2026)
Typical price ranges for windows & doors work in London. Get at least 3 quotes to compare.
Prices in CAD. Based on typical Ontario contractor quotes, 2026. Actual costs vary by scope, materials, and access.
Windows & Doors Licensing in Ontario
Required Licence
No mandatory Ontario licence, but installations should follow OBC
Window and door installations in Ontario should comply with the Ontario Building Code for energy efficiency and structural requirements. Look for Energy Star certified products.
Red Flags to Watch For
- No written warranty
- Non-Energy Star products
- No proof of installation training
- Won't show product certifications
London Homeowner Resources
Official municipal links for permits, bylaws, and services
Ontario Contractor Verification
Verify licences, insurance, and credentials before hiring
What to Book This Season
March — May in London
Spring is peak booking season. Contact contractors in February for the best availability.
Before You Hire a Contractor in London
- Get at least 3 written quotes for comparison
- Verify WSIB clearance certificate (protects YOU from liability)
- Check Google reviews AND ask for local references
- Confirm they will pull all required permits
- Never pay more than 10-15% deposit upfront
- Get everything in writing — scope, timeline, payment schedule
- Verify their business insurance is current
- For regulated trades (electrical, plumbing, gas), verify their license number
Ontario law: Ontario's Construction Act provides a 10% holdback right on construction projects. Learn more
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Frequently Asked Questions — Windows & Doors in London
- How many windows & doors contractors are in London?
- There are currently 6 verified windows & doors contractors listed in London, Ontario in our directory.
- Do windows & doors contractors need a licence in Ontario?
- No mandatory Ontario licence, but installations should follow OBC. Window and door installations in Ontario should comply with the Ontario Building Code for energy efficiency and structural requirements. Look for Energy Star certified products.
- Do I need a building permit for windows & doors work in London?
- Most windows & doors work in London may require permits from the local building department. Your contractor should handle the permit process. Always confirm permits are included in your quote.
- How much does windows & doors work cost in London?
- Windows & Doors costs in London vary by project. Window Replacement: $500-$1,500 (per window). Entry Door: $1,500-$5,000 (installed). Get at least 3 quotes to compare.
- How do I verify a windows & doors contractor's insurance in London?
- Request a current Certificate of Insurance and verify WSIB (Workplace Safety and Insurance Board) coverage at wsib.ca. This protects you from liability if a worker is injured on your property.
- How much does window replacement cost in Ontario?
- Window replacement in Ontario costs $500-$1,500 per window installed, depending on size, style, and energy rating. A full home (10-15 windows) runs $7,000-$20,000. Energy Star windows qualify for Greener Homes Grant rebates of up to $250 per window.
- Are there rebates for new windows in Ontario?
- Yes. The Canada Greener Homes Grant offers $125-$250 per window for Energy Star certified replacements. Enbridge offers additional rebates. Combined, you can recover $2,000-$5,000 on a full window replacement. You need a pre- and post-retrofit EnerGuide evaluation.