Service Area
Windows & Doors in Markham
Window, door, masonry and egress installation across Markham — from Unionville heritage homes to modern Cornell builds.
Markham coverage and scheduling
Every Markham neighbourhood
Unionville, Cornell, Cathedraltown, Berczy Village and Thornhill — we install across all of Markham.
Fast scheduling
Most Markham projects are quoted within the week. Installs typically begin within 4–6 weeks.
Local references
Hundreds of completed Markham projects. Ask for references in your neighbourhood when you request your estimate.
Markham Projects
Built for Markham homes — old and new
Markham's mix of heritage districts and new-build communities means every project is different. We tailor every install to the home's age and structure. Common Markham projects include casement window, tilt & turn, and bay window replacements, along with steel and fiberglass entry doors, sliding patio doors, full masonry work, code-compliant egress windows, and Markham permit assistance. Flexible financing is available, or you can request a free quote any time. See what Markham-area homeowners say about working with us.
Our Difference
Built for Ontario Homes
Trust Build Windows and Doors focuses on long-term performance, energy efficiency, and professional installation. Every project is measured, manufactured, and installed to meet the unique requirements of Ontario homes and weather conditions.
Built for Ontario Homes
Trust Build focuses on long-term performance, energy efficiency, and professional installation. Every project is measured, manufactured, and installed to meet the unique requirements of Ontario homes and weather conditions.
Premium Components
We use quality products and components including German-engineered hardware, high-performance glass systems, advanced weather sealing, and energy-efficient window and door designs built for durability and comfort.
Professional Installation
Proper installation is just as important as the product itself. Our experienced installation teams follow proven methods designed to improve energy performance, reduce drafts, and help protect your investment.
Energy Efficiency
Modern windows and doors can improve comfort throughout the year by helping reduce heat loss in winter, limiting solar heat gain in summer, and supporting lower energy consumption.
Warranty Protection
Our products are backed by comprehensive warranty coverage, giving homeowners confidence in the performance and longevity of their investment.
Trusted Across Ontario
From single-window replacements to complete home exterior upgrades, homeowners throughout Ontario trust our team for reliable service, quality workmanship, and professional results.
Markham Neighbourhoods
Window and door installation in every Markham neighbourhood
Visit a dedicated page for your area to see common projects, local references and what to expect.
FAQ
Frequently Asked Questions
Flexible Financing Options Available
0% promotional plans and low monthly payments through licensed Ontario lenders. Pre-qualify in minutes.
See financing plansLifetime Product Warranty
Frames, sashes, hardware and our workmanship — covered for as long as you own the home.
Why homeowners trust us4.9 ★ from 327+ Reviews
Verified reviews from Ontario homeowners across Google, HomeStars and Facebook.
Read customer reviewsFree Quote
Get Your Free Markham Estimate
Tell us about your project. We'll be in touch within one business day to discuss your needs and provide a detailed estimate.
- Detailed project assessment
- Written itemized quotation
- Product and installation recommendations
- Financing options available
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