Simon & Sons Windows and Doors
“Derrick, Colin, Evan and the installers were all great to deal with and very professional.”
Best Window Installers in Newmarket, ON
15 companies listed · 5 in Newmarket · 1 open 24/7 · 10 open weekends · 13 rated 4.5+
Data verified October 16, 2026
Keldan Limited
“The whole process from the initial quote to installation was very smooth.”
Benjamin Moore
“Jessi won't forget your name, even after 2 yrs and over all a great experience.”
Moderno Construction Inc.
“John was able to answer all my questions and helped me to select door for my house.”
Classic Windows & Doors
Window and Door Specialist
“The Window and Door did an amazing job installing 2 oversized patio doors on our sunroom.”
Listed for homeowners in and around Newmarket, ON, these 15 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: Newmarket, ON
5 of the 15 companies we list are based in Newmarket; the other 10 serve Newmarket from towns including Richmond Hill (21 km), Aurora (6 km) and Maple (19 km). 14 of the companies on this page have a rating, from 3.7 to 5.0 across 709 reviews; 7 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise quality (88%), professionalism (84%) and responsiveness (77%). The topics that come up most in reviews of the companies on this page are "price", "estimates" and "cleanliness". 1 is open around the clock; 10 are open on Saturdays and 7 on Sundays. 3 have ten or more years of experience, the longest 24 years. 2 offer emergency call-outs; 4 offer financing or payment plans; 9 give free estimates; 4 are family- or locally-owned and 3 list coupons or special offers. We have a website on file for all 15 of the companies on this page; 14 publish a contact page; 11 list a public email and 1 takes bookings online. 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.
Do the listed window companies all have premises in Newmarket?
5 of the 15 give an address in Newmarket itself; the rest serve it from within 25 km. A showroom often covers a whole region, so distance matters less than who does the installing. Ask whether the fitters are employees, and how a callback in the middle of winter is handled.
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“He had previously done work on our old house many years ago (new gutters & guards, downspouts, soffits, railing) and we were very happy with his work at that time as well.”
VR Windows Corporation
“Maria was very helpful for us to decide the type of windows and doors for our home.”
Eco Choice Windows & Doors Toronto
“Their sales person was friendly, knowledgeable and prompt with his quotes, they had a large range of choices, and their prices were reasonable.”
Luma Doors + Windows
“From consultation with Mike to installation team of Igor and Victor, I was extremely satisfied with the professionalism, knowledge and expertise displayed”
Premier North Windows and Doors
“Service is amazing owner is organized and punctual I highly recommend his service I highly recommend this company”
Apollo Glass & Mirror Ltd.
“Apollo glass had the new piece fitted and replaced by the next morning.”
The Glass Experts
“Extremely pleasant experience working with Eden and his team, the quality of the entire process was fantastic.”
Heritage Home Design Inc.
“They also replaced my drafty double front doors with a 42” beautiful mahogany door with double side lites.”
Khali Windows & Doors
“Khali Windows and Doors did a great job replacing all our windows and entry door, sales guy Emil was polite and quick with a responses and installation crew did quick and fantastic job.”
Why these companies made our list
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