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Windows and Siding Whitby
Window Replacement and Siding Installation in Whitby, Ontario
For over 30 years, McLellan Contracting has delivered trusted window replacement and siding installation in Whitby, helping homeowners improve energy efficiency, curb appeal, and long-term value. We’re fully licensed and insured, with SAWDAC-certified installers and warranty-backed products—all from a team rooted right here in the Durham Region.
Complete Exterior Services for Whitby Homes
Whether it’s a small repair or a full exterior renovation, our Whitby team is here to help. We specialize in:
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Home window repair in Whitby
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Window glass replacement
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New siding installation
PROFESSIONAL SIDING INSTALLATION
Durham weather can be rough—protect your home with expertly installed vinyl siding. Our siding installation in Whitby is built to handle Ontario’s freeze-thaw cycles and humidity.
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Durable, weather-resistant Kaycan siding
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Installed by trained, certified professionals
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Improved energy efficiency and home value
TRUSTED WINDOW REPAIR AND REPLACEMENT
Cracked panes, moisture buildup, or old inefficient units? We handle all types of window repair in Whitby. For major issues or upgrades, we offer full window replacement using Window Wise Certified products.
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Most installations are completed in one day
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Energy Star-rated products are available
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Custom window styles to match Whitby homes
Why Homeowners in Whitby Choose Us
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Over 30 years serving the Durham Region
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Verified 5-star reviews from Whitby homeowners
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Transparent pricing and no hidden fees
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Clean, respectful crews and tidy job sites
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100% satisfaction guarantee
Customer Reviews
Called McLellan for some work on my support post footings and siding/soffit. Teams that came out were incredibly professional and did outstanding work. John was a pleasure to work with, and his team did a great job of communicating a great schedule to get the job done. Will definitely call them again for future jobs.
Homeowner
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Window and Siding Services in Whitby
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Request Your Quote for Window Replacement in Whitby
Ready to improve your home’s comfort, curb appeal, and energy efficiency? McLellan Contracting is your trusted choice for expert window replacement in Whitby and professional siding services across the Durham Region.