Buildmart Windows & Doors
“From the initial consultation to the final installation, their attention to detail and commitment to quality were evident.”
Best Window Installers in Ottawa, ON
18 companies listed · all 18 in Ottawa · 2 open weekends · 12 rated 4.5+ · 2 show a licence
Data verified November 8, 2026
West End Windows and Doors
“Today I had the pleasure of having Jason install a door at my home, and I am beyond impressed with his work.”
Capitall Windows
“There were some issues with other trades being at location but they were very professional and managed to get the job done nice and quick.”
Eco Ottawa Windows and Doors
“Shane did a great job at explaining the pros/cons of changing my window project.”
M&T Glass
“Ken at the service desk was able to find the parts that I needed and provided excellent service and pricing.”
Marlboro Window and Door Manufacturer Ltd
“Despite working during an intense heat wave, they maintained a positive attitude and showed unwavering commitment to their craft.”
Listed for homeowners in and around Ottawa, ON, these 18 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: Ottawa, ON
All 18 companies we list here are in Ottawa itself. We have 21 companies in Ottawa on file; this page shows the highest-rated 18. The companies on this page are rated from 3.9 to 5.0 across 2,335 reviews; 11 have 50 or more reviews and 12 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (94%), quality (84%) and value (84%). The topics that come up most in reviews of the companies on this page are "estimates", "cleanliness" and "efficient". 2 are open on Saturdays. 2 show a licence on their websites. Domain records put 11 websites of the companies on this page at ten or more years old; the oldest dates from 1996. 2 offer emergency call-outs; 4 offer financing or payment plans; 11 give free estimates; 3 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for all 18 of the companies on this page; 15 publish a contact page; 14 list a public email and 2 take bookings online. We count these figures across the companies on this page; 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 11 of the 18 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.
Centennial Glass
“Happy with the service received to replace a foggy window and the hardware on another window.”
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Big City Windows & Doors Ottawa
“From our first meetings with the sales rep and estimator, to our informative visit to their showroom, to the fast, efficient tradesmen who carefully measured, built and installed our beautiful new windows we could not be more pleased.”
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Fenex Windows and Doors
“We had a new patio door installed , Adrien and James arrived on time and did a great job.”
Perspective Windows & Doors Ltd.
“A big thank you to this company for a wonderful experience pre and post installation.”
Advantage Enterprises Windows & Doors Ottawa
“I highly recommend Advantage Enterprises Windows & Doors for those who value quality and professionalism.”
Ottawa Glass Ltd
“John and his assistant did an excellent installation of our custom shower glass enclosure.”
Fenplast
“Had originally posted 1 star but manager delt with the problem very well and to our satisfaction.”
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Merivale Windows & Door
“They offer a great selection of high-quality products and their installation team was efficient and tidy.”
Bowen Windows
“Mike Bowen in sales guided me expertly, helping me make good choices throughout the process.”
National Contract Glazing Ltd
Prolite Glass & Mirrors Inc.
“Love this place and has great service and people!”
Paramount Door & Window Service
“The owner is very knowledgeable and even gave me tips to save money on the repair!”
Why these companies made our list
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