5 Best Window Replacement Companies in Ottawa

Replacing your windows isn’t just a cosmetic upgrade; it’s a significant investment that can boost your home’s energy efficiency by up to 35%, reduce drafts and noise, and even increase your home’s resale value.

However, this only holds if the work is done by a reputable window company using high-performance, energy-efficient products. So, how can you tell if your local company is truly reliable and offers the best value for your money? That’s where expert insight makes all the difference.

With over 40 window companies operating in Ottawa alone, choosing the wrong one can result in poor installation, limited warranties, or inefficient products that fail to meet ENERGY STAR standards. That’s why doing your homework matters.

Homeowners should compare companies based on product quality, energy ratings, installer certification, warranties, and real customer reviews on platforms like Google, HomeStars, and TrsutedPros. Thoroughly analyzing your potential contractor helps to find a partner who can deliver long-lasting value – not just new windows.

Below, we break down the top 5 window replacement companies in Ottawa, ranked by expert analysis, to help you make an informed, confident decision.

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Comparing Top-5 Window Replacement Companies in Ottawa

Logo	Company	Type	Warranty	Google Rating
	Ecoline Windows & Doors	Manufacturer & Installer	25 Years on Product & Labour	4.7 based on 350 reviews
	Verdun Windows	Manufacturer & Installer	25 Years on Product & Labour	4.5 based on 1701 reviews
	Bayview Windows	Installer	20 Years	4.8 based on 140 reviews
	Canadian Choice Windows	Manufacturer & Installer	25-year Transferable Warranty	4.6 based on 249 reviews
	Buildmart Windows	Installer	25 Years on Product & Labour	4.9 based on 167 reviews

1. Ecoline Windows and Doors

At Ecoline, our primary goal has always been to ensure top customer satisfaction. We have been in business since 2002, and during this time, our team has completed over 9,000 projects, installing more than 63,000 windows and doors. 

Even after establishing a big name in the industry, we still cherish the principle of “a big company with small company values.”  That’s why we always strive to provide Ottawa homeowners with the best products and services while maintaining transparent relationships built on trust and respect.

Ecoline’s focus is on energy-efficient, triple-pane vinyl windows, all of which are custom-made to meet or exceed ENERGY STAR and NAFS-22 standards. All windows and doors are Canadian-made and built in Ontario.

Ecoline specializes in full-frame replacements, a more comprehensive installation method that addresses the most common home issues, such as rotting frames, leaks, ice build-ups, and condensation, and helps ensure maximum energy efficiency. We offer extensive financing options, assist homeowners with applying for government rebates, and provide an industry-leading warranty that covers both product and labour. No hassle and no fine print.

• 25 Years Warranty on Product and Labour
• BBB Rating: A
• Local Showroom: Yes, in Nepean

By providing your phone number and email, you consent to receive calls, texts, and emails regarding your request, including follow-ups and updates. Text HELP for help or STOP to cancel. Message and data rates may apply. Message frequency varies. For more information please check our privacy policy.

+1 (866) 644 6418

2. Verdun Windows and Doors

Verdun Windows and Doors is a well-established name in the Ottawa region, recognized for its in-house manufacturing and installation, which ensures consistency in product quality and service. Their windows are engineered in Ontario and meet the most efficient ENERGY STAR® certification, making them a reliable choice for energy-conscious homeowners.

The company is well-known for its RevoCell® PVC products, a window line that promises enhanced thermal performance and structural durability. They focus on full-frame installations, ensuring better insulation and long-term performance, particularly in older homes that require a complete upgrade.

Verdun also offers a 25-year warranty on parts and labour and has a strong presence on review platforms like Google and HomeStars, where homeowners frequently praise the installers’ professionalism and product reliability. While lead times can occasionally be longer due to high demand, their reputation for quality and in-house control makes them a solid runner-up.

• 25 Years Warranty on Product and Labour
• BBB Rating: A+
• Local Showroom: Yes, in Nepean

3. Bayview Windows and Doors

Bayview Windows is a family-owned business that has carved out a niche in Ottawa by focusing on personalized service and high-quality window installations, supplying windows from some well-known manufacturers.

Bayview offers full-frame window replacements using products manufactured in Canada, most notably North Star and Del Windows. All options meet ENERGY STAR® standards, and customers can choose between double or triple-pane glass with Low-E coatings and gas-filled units for enhanced efficiency.

With strong reviews on Google and HomeStars and transparent service, Bayview is often favoured by homeowners looking for a locally trusted brand. Although they may not manufacture their own windows, their expertise in installation and customer service earns them a solid place in the Ottawa market.

• 20 Years Warranty 
• BBB Rating: A+
• Local Showroom: Yes, in Richmond

4. Canadian Choice Windows & Doors

Canadian Choice is one of the more recognizable brands in the window replacement industry, with a significant presence across Ontario, including a dedicated team serving the Ottawa area. They offer a broad product line, including double- and triple-pane windows manufactured in Canada, designed to meet ENERGY STAR requirements.

The company specializes in full-frame installations, with a focus on affordability and prompt service. One of their standout features is the DraftLOCK window series, which uses Low-E coatings and Argon gas for improved insulation. They also provide lifetime transferable warranties, which can be a massive benefit for resale value.

Customer experiences can vary, though. While Canadian Choice has hundreds of positive reviews across various platforms, including Google and HomeStars, some clients have noted inconsistencies in communication or post-installation follow-up. Still, for those seeking energy-efficient home windows and a diverse selection of styles, Canadian Choice is a solid brand to consider.

• 25-year Transferable Warranty 
• BBB Rating: A+
• Local Showroom: Yes, in Nepean

5. Buildmart Windows & Doors

Buildmart is a lesser-known but growing window and door installer in the Ottawa market. They focus on offering cost-effective solutions by installing products from several big Canadian-made vinyl window manufacturers. Their product lines generally meet ENERGY STAR performance standards, and they offer all the popular window styles, including casement, hung, sliding and bay windows, as well as modern tilt-and-turn units.

Buildmart handles full-frame replacements and offers services for both residential properties and new construction projects. They’re known for their quick response times, reasonable pricing, and straightforward installation process. Their Google reviews are mostly positive, though the volume is lower compared to more established competitors. Although this window company may not have the same scale or brand recognition, for budget-conscious homeowners seeking decent quality, Buildmart is a practical choice. But be sure to ask detailed questions about product specifications and warranty coverage when getting a quote.

• 25 Years Warranty on Product & Labour 
• BBB Rating: A+
• Local Showroom: Yes, in Ottawa East

Final Thoughts

Finding the right window replacement company in Ottawa isn’t about picking the biggest name. It’s about choosing a reliable partner that aligns with your home’s needs, energy goals, and budget. Whether you prioritize top-tier energy efficiency, a local touch, or fast turnaround times, the five companies listed above represent some of the most trusted names in the region. But before signing a contract, be sure to:

• Check online reviews on Google, TrustedPros, and HomeStars
• Compare warranty terms and installation methods
• Ask about the energy specifications of different window styles
• Make sure their products are eligible for local rebates and loans
• Get quotes from at least 2-3 window contractors for a fair comparison

Your windows significantly impact comfort, efficiency, and resale value. They are to serve for at least the next 25 years. Make sure to choose the best.

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