Consumer Direct Windows & Doors
“All 16 windows in our home were replaced and we couldn't be happier with the final results.”
Best Window Installers in Whitby, ON
15 companies listed · 8 in Whitby · 8 open weekends · 13 rated 4.5+ · 1 shows a licence
Data verified October 21, 2026
Limestone Construction and Excavating
“I was completely impressed with his professionalism ,customer service and more than pleased with the outcome.”
Royal Windows & Doors
“Very happy with the new windows and they went brick to brick so windows on top of being nicer looking they are also larger.”
The Green Window Company
“Phil the owner took extra time and care to ensure we got the perfect windows for our house on the Lake.”
Luke's Windows & Doors
“He was responsive, went out of his way to fit us into his schedule, offered helpful suggestions, and resolved an issue with our door that was above and beyond our expectations.”
Ivory Glass & Window Inc
“I'd recommend Ivory Glass & Window for everyone who's looking for a perfect renovation for good price”
Listed for homeowners in and around Whitby, 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: Whitby, ON
8 of the 15 companies we list are based in Whitby; the other 7 serve Whitby from Oshawa (8 km), Ajax (8 km) and Courtice (12 km). The companies on this page are rated from 4.2 to 5.0 across 448 reviews; 2 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 professionalism (100%), quality (87%) and responsiveness (77%). The topics that come up most in reviews of the companies on this page are "price", "efficient" and "estimates". 8 are open on Saturdays and 3 on Sundays. 1 shows a licence on its website. 3 have ten or more years of experience, the longest 24 years. 6 give free estimates; 2 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 12 of the companies on this page; 12 publish a contact page and 8 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 6 of the 15 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.
Independant Glass 2000
“Had glass shower floor to ceiling installed , looks great fast turn around, definitely recommend.”
Glass Repair & Replacement Whitby
“They are amazing, fast service and fixed a measurement mistake (made by me) in minutes with no issue...”
Pro Windows & Doors ACM
“I love the finished product and Andy was helpful with education on how to get the longest life out of our new investment.”
Stone River Windows Doors
“Stone River did a great job at a very good price and the work was completed much faster than expected!”
Pinnacle 1 Decorative Doors
“John presented the options for our decorative glass solution, advised on an estimated completion time and delivered on the date he said he would.”
Quality Home Improvements
“They installed some flashing around my siding two years and recently replaced three window panes that had developed leaks.”
Dowling & Sons Home Improvements / Eddy's Home Improvements
“Just had a new door and side lite installed and I was never so happy with the work that this company did.”
Smid Construction Limited
“I've used many construction companies in my years as a Condominium Manager but once I found Smid I knew I had found the best.”
Nuguard Windows and Doors
“The team is knowledgeable about home renovation, especially installing new fixtures.”
Why these companies made our list
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