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Arctic Vinyl Windows & Doors
- Patio Door
- Product
- Company
“We were going to change all the windows in our house but decided to just change the main floor ones because Mike told us that the lower level windows were in good shape.”
Best Window Installers in Markham, ON
24 companies listed · 17 in Markham · 2 open 24/7 · 15 open weekends · 20 rated 4.5+
Data verified October 18, 2026
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Thermo-Bilt Windows & Doors
- Patio Door
- Products
- Company
“Their windows eliminated my house developer's very poor products and workmanship while they added sound proofing and smoother aesthetics at a competitive market price.”
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Window Experts
- Price
- Job
- Team
“We purchased 2 steel doors from the Window Experts for a custom home in Toronto and everything about the experience from start to finish was first class.”
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Crown Windows & Doors 皇冠門窗
- Company
- Technician
- Quotation
“Michael, the installation expert came on the agreed date and time to perform the installation services which was completed on time and up to expectation.”
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Statements Windows and Doors
- Company
- Product
- Paint
“We were impressed by the timely manner in which our order was fulfilled, and Mitchell's professionalism made the entire process smooth and hassle-free.”
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Fieldstone Windows & Doors Ltd.
- Stars
- Product
- Company
“The Owner of this company and Staff are so honest and trustworthy, products are outstanding and not to mention the installation is done with care and precision in each product that they install.”
Listed for homeowners in and around Markham, ON, these 24 companies fit and repair windows. Frame materials, glazing options and any credentials shown are taken from company websites; the customer lines are quoted from public reviews.
Area overview: Markham, ON
17 of the 24 companies we list are based in Markham; the other 7 serve Markham from towns including Concord (14 km), Toronto (17 km) and Richmond Hill (14 km). 23 of the companies on this page have a rating, from 4.2 to 5.0 across 985 reviews; 7 have 50 or more reviews and 20 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (91%), quality (85%) and responsiveness (78%). The topics that come up most in reviews of the companies on this page are "cleanliness", "price" and "estimates". 2 are open around the clock; 15 are open on Saturdays and 6 on Sundays. 1 shows a licence on its website. 8 have ten or more years of experience, the longest 24 years. 2 offer emergency call-outs; 2 offer financing or payment plans; 14 give free estimates; 3 are family- or locally-owned and 4 list coupons or special offers. We have a website on file for 23 of the companies on this page; 21 publish a contact page and 19 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Is the home visit and measurement free?
A no-cost quote is offered by 14 of the 24 companies on this page. It comes with a sales visit, so agree how long it will take before they arrive. Ask for the quote in writing on the day, itemized by window, and be wary of a discount that disappears the moment the visit ends.
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M & M Window Company Inc
- Fair
- Family Owned Business
“My whole process was very simple and easy, I needed a new patio door, went into their showroom and the salesperson came over free of charge to measure and gave me a quote.”
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Eticom Windows and Doors Replacement Markham
- Showroom
- Patio
“At first, we a little apprehensive when the customer service clerk showed us tilt and turn patio doors when we visited the Eticom showroom.”
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Blackline Aluminum
- Management
- Team
“Good working with Blackline!”
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Universal Window Decor
- Blinds
- Price
- Suit
“This company has the best quality shutters got shutters for my whole house about 2 years ago still in great condition can't complain great service very friendly and awesome service.”
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Winford Windows Inc
“I will highly recommend to my friends and family!”
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AGR Windows
“Excellent work great employees fast service”
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Alupin Windows & Doors
“Ben Izadi is the number #1 guy for all your Window and Doors needs!”
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New Vision Windows & Doors 新視界門窗公司
“Special Sunroom， nice view”
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BBG Shutter
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Custom Windows & Doors Markham
“The technician dealt with our home door repair yesterday, and he was highly efficient.”
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Iron Villa
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Trust Build Windows and Doors
- Front Door
- Job
- Team
“Sergie communicated with us during the consultation process and Zamir did an excellent job at removing the old glass/frames and installing the new windows!”
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Amica Windows and Doors Inc.
- Results
- Team
- Questions
“After waiting out another lockdown, Michael's crew arrived, sticking with health and safety protocols, and managed to replace every window in our house in a day and a half.”
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Sangster Windows & Doors
- Patio Doors
- Job
- Team
“He was very helpful in guiding us through a selection of the most appropriate door and installed it for us with dispatch once it had arrived from the factory.”
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Window and Door Specialist
- Project
- Price
- House
“Very pleased with this company and its service - window retrofit, new door and new storm door; all questions answered readily, delivery and installation was performed with professionalism and care.”
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Egress Windows Toronto
- Clean
- Team
- Basement
“They protected inside of the house, each guy did his part without asking, were done in few hours as good team, worked without breaks or smoking or delay.”
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Alda Windows and Doors
- Door Installation
- Front Door
- Team
“I had previously contacted two other door companies that made me wait over a week for an estimate and kept insisting to schedule a home visit in order to provide me with further information about prices and door options.”
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GTA Glass
- Job
- Price
“David did a really good, nice, clean job, very efficient and patient with all the interruptions from customers wanting to come in as he was trying to work.”
Window Replacement & Installation Services in Markham, ON Cost Estimates
Minimum cost
$478
Maximum cost
$27731
National Average
$7622
Avg Per Hour Rates
$59
$4190
$11990
Average price range is based on 369 cost profiles
Why these companies made our list
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