Windows are one of those things you don’t think much about until there’s a draft sneaking in or condensation fogging up your view. When it was time for us to replace ours, we quickly realized that not all window companies are created equal.
The process can feel a bit overwhelming, from finding the right style to ensuring the installation is done properly. Luckily, Ottawa has some solid options to make the upgrade stress-free and worthwhile.
If you’re after better insulation, a more modern look, or just a clear view without cracks and leaks, here are the top window replacement companies in Ottawa you can count on.
How much does a window replacement project cost in Ottawa?
On average, homeowners can expect to pay up to $47,000 for a full-house replacement.
The cost of a window replacement project in Ottawa can vary widely depending on factors like the number of windows, their size, materials, and installation complexity. For smaller projects or single-window replacements, costs will likely be much lower, but it’s always best to get a detailed quote based on your specific needs.
1. Westend Windows and Doors Ottawa

Address: 1900 Merivale Rd #110
Business hours:
- Monday to Friday – 9 AM to 4 PM
- Saturday and Sunday – Closed
Contact number: +16134915121
Westend Windows and Doors Ottawa stands out for its good quality and attention to detail. Many customers mention how well the windows fit, transforming their homes with a polished, clean look.
We noticed how their custom options allow for a tailored experience, which is a big plus for those seeking something unique. The windows also seem durable and energy-efficient, helping to keep the home comfortable year-round.
However, we noted a few instances where follow-ups for minor fixes, like mismatched handles, took longer than expected. While it doesn’t overshadow the overall quality, it’s worth double-checking every detail after installation.
Overall, Westend Windows provides a combination of aesthetic appeal and reliable performance, making it a solid choice for upgrades.
If you’re looking to give your home a fresh look with quality windows, this is a company to consider—just keep an eye on those finishing touches.
Reliable choice for multiple projects
“Westend Windows and Doors are the most professional window and door company I have seen. I’ve used them on 2 jobs and plan more!”
-Jimmy Novak, Google Review
Beautiful windows with quick installation
“The windows are nice and the front door is beautiful. Good follow-up for their customer service. Fast installation time as well.”
-Melanie H, Google Review
2. Verdun Windows and Doors

Address: 104 Clement St, Vars
Business hours:
- Monday to Thursday – 7:30 AM to 4:30 PM
- Friday to Sunday – Closed
Contact number: +16134432694
Verdun Windows and Doors have made a name in Ottawa for their sturdy, modern windows that add a fresh, clean vibe to any home.
The installations often seem seamless, with windows fitting snugly and instantly improving insulation. Overall, we love that they provide options for older homes looking for a much-needed update.
We also appreciate how Verdun’s windows seem to combine functionality with style, giving your home a more contemporary feel while keeping the elements out.
That said, some clients have noticed occasional issues with follow-ups or insulation concerns over time. While the overall product quality appears solid, it might help to ensure everything is properly sealed during installation.
Highly recommended for excellent service and products
“Excellent service and products. From Sales to Installation, I highly recommend Verdun Windows and Doors.”
-Kristen Johnston, Google Review
Consistently great windows and seamless installation
“This the second time using Verdun for window replacement. The windows are great, the installation is great. Overall enjoy the experience.”
-Chris Bourgeois, Google Review
3. Capitall Windows

Address: 2212 Gladwin Crescent A3
Business hours:
- Monday to Friday – 9 AM to 4 PM
- Saturday to Sunday – Closed
Contact number: +16136800492
Capitall Windows earns points for its ability to tackle big projects and custom designs. We love the seamless integration of windows into challenging spaces, like adding new openings in walls, which can be a game-changer for homeowners.
Their designs also look modern and energy-efficient, adding a functional yet stylish touch to any home.
However, some customers mentioned concerns about damaged products and improper sealing in rare cases. While the company often handles straightforward projects with ease, it might be worth asking extra questions about their process for more complex jobs.
All-in-all, Capitall Windows is a good pick for those who want innovative designs and reasonable pricing. If you’re planning a major home update or adding custom windows, they’re a reliable option as long as you stay involved in the details.
Expert craftsmanship and seamless results
“I can say that the two installers and the sale rep Pete did a great job. No pressure sales, and the two fellas who did the work sure are true craftsmen.
I would highly recommend Capital Windows. Job was perfect. My wife and I are so pleased. I also painted the exterior of over home to match the door.”
-Greg Ritchie, Google Review
Above and beyond service for flawless bay window replacement
“We had a bay window in our kitchen replaced. The installars found some rot in the sill after taking out the old one.
They went above and beyond to fix the sill and wall underneath. The extra charge for this unforeseen damage was very reasonable.
They worked much longer and finished the install to perfection. We were beyond pleased with the whole experience. I highly recommend them.”
-Vivian Rutherford, Google Review
4. Basco Ottawa | Window Replacement & Repair

Address: 343 Preston St 11th Floor
Business hours:
- Monday to Thursday – 8 AM to 4 PM
- Friday – 8 AM to 12 PM
- Saturday to Sunday – Closed
Contact number: +16132634053
Basco Ottawa is a solid option for a straightforward, cost-effective way to improve your windows. They offer a practical approach with their replacement panes, which can save money and reduce the disruption of a full window replacement.
We like how efficiently they handle the process, swapping out panes in just a few hours without leaving a mess behind. It’s also great for homeowners with solid frames who want a budget-friendly fix.
On the downside, delays in orders or communication issues have been mentioned in our surveys, which can be frustrating if you’re on a timeline. Double-checking delivery dates and staying proactive with updates could help avoid this.
Nevertheless, their quick turnaround for simple jobs and long warranties make them a worthwhile choice. Just keep an eye on those delivery timelines to stay ahead of any hiccups.
Efficient and meticulous service from start to finish
“Very professional. They have an excellent communication infrastructure that kept us informed all along the way from initial contact to quote then work completing the work.
Despite heavy rain the installers led by Francis diligently completed caulking on our entire house. All windows and doors as well as utility penetrations. Billing and payment was complete via credit card.
I recommend this efficient and meticulous company.”
-Paul R. Walkington, Google Review
Caring team with flawless installation craftsmanship
“Great company to deal with. Very professional and caring. Took the time to answer any questions and the installation by Tristen went perfectly.
Thanks for bringing our home back to new again.”
-Mike King, Google Review
5. Ecoline Windows and Doors Ottawa

Address: 2081 Merivale Rd #201
Business hours:
- Monday to Friday – 10 AM to 8 PM
- Saturday – 10 AM to 6 PM
- Sunday – Closed
Contact number: +16137060889
Ecoline Windows and Doors shines with its sleek and modern window designs, especially their black exterior frames that instantly add a contemporary touch to any home.
We love how these windows can transform a space, pairing beautifully with matching doors for a polished, cohesive look.
That said, some clients have mentioned small hiccups, like installation delays or the occasional need for follow-ups on details like caulking. While these issues didn’t seem to overshadow the overall experience for most, they’re worth keeping in mind to ensure everything goes smoothly.
For anyone looking to upgrade their windows, Ecoline offers an excellent mix of functionality and style. The final result—clean lines, thoughtful design, and a modern vibe—makes it a great choice, especially if you’re clear on timelines and expectations from the start.
Quick, clean, and highly professional work
“Kiryl and Stepan were amazing and very professional. Everything was done within two days, they cleaned up and left our house as it was when they arrived. Highly recommend! ”
-Paul Blais, Google Review
Dedicated professionals who go the extra mile
“Incredibly professional! Arrived when they said they would, stayed longer on the second day to get everything done despite the freezing rain warnings!
Friendly, informative, Kiryl and Stepan are the consummate professionals you want working on your home.
Highly recommend!”
-Dwayne Cormier, Google Review