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Fall Special: Up to 40% off + Save the HST — ends Oct 31 *Conditions apply Book your free quote
(416) 636-8651
Global Windows and Doors Home Improvement Inc.
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Markham, Ontario

Window & Door Replacement in Markham

Markham ranges from the heritage streets of Unionville and Markham Village to the very large subdivisions built through Cathedraltown, Cornell and Milliken since the 1990s. That means two different jobs in one town: matching period detail, or replacing two-decade-old builder windows at scale.

Lifetime Warranty

Backed by our lifetime warranty.

Financing Available

Flexible monthly plans with approved credit.

Free In-Home Quotes

Exact written pricing, no pressure.

Neighbourhoods we serve in Markham

Unionville Thornhill Milliken Cornell Cathedraltown Markham Village
Get a Free Quote in Markham Call (416) 636-8651

Also serving nearby North GTA communities

Aurora East Gwillimbury Keswick King City Maple Newmarket

Markham homeowners

Book your free Markham consultation

We measure every opening, show you real samples, and give you exact written pricing, valid for 30 days.

Get Your Free In-Home Quote

No pressure. No obligation. Exact written pricing.

Your information is private and never shared.

Same-day callback. Requests received before 6:00 PM get a call the same day; later ones first thing the next morning.

Fall Special: Up to 40% off + Save the HST — on projects booked by October 31st. *Conditions apply