Window & Door Replacement Contractors in London
6 verified window & door replacement contractors in London. Compare ratings and reviews.
Window & Door Replacement in London — What You Need to Know (2026)
Looking for the best window & door replacement contractors in London? Our directory lists 6 verified window & door replacement companies in London, Ontario, ranked by Google reviews and ratings. Compare window & door replacement contractors near London to find the right fit for your project.
Window & Door Replacement Cost in London (2026 Ontario Rates)
Window & Door Replacement 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 window & door replacement 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 Window & Door Replacement Contractor in London
When hiring a window & door replacement 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 Window & Door Replacement Work in London
Timing matters for window & door replacement work in London. Ontario's seasonal weather patterns affect both scheduling and pricing. Book your window & door replacement 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 window & door replacement 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 window & door replacement businesses in London
London Glass & Windows
London Glass & Glazing
London Glass & Glazing Ltd.
London Glass & Windows Ltd.
London Glass Co.
Windows Plus Ltd.
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Window & Door Replacement Cost Guide — London (2026)
Typical price ranges for window & door replacement 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.
Window & Door Replacement Licensing in Ontario
Required Licence
No mandatory Ontario licence, but installations should follow OBC
Window and door replacements in Ontario should comply with Ontario Building Code energy efficiency requirements. Look for Energy Star certified products and installers with manufacturer training. Building permits are required for structural window openings.
Red Flags to Watch For
- Non-Energy Star certified products
- No written warranty on product and labour
- Vague installation timeline
- Won't show proof of liability insurance
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 — Window & Door Replacement in London
- How many window & door replacement contractors are in London?
- There are currently 6 verified window & door replacement contractors listed in London, Ontario in our directory.
- Do window & door replacement contractors need a licence in Ontario?
- No mandatory Ontario licence, but installations should follow OBC. Window and door replacements in Ontario should comply with Ontario Building Code energy efficiency requirements. Look for Energy Star certified products and installers with manufacturer training. Building permits are required for structural window openings.
- Do I need a building permit for window & door replacement work in London?
- Most window & door replacement 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 window & door replacement work cost in London?
- Window & Door Replacement costs in London vary by project. Window Replacement: $500-$1,800 (per window installed). Entry Door: $1,500-$6,000 (installed). Get at least 3 quotes to compare.
- How do I verify a window & door replacement 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.