Quick Verdict
• Buildmart Windows & Doors is the best overall service for window and door replacement in Ottawa, rated 4.9 stars on Google and backed by award recognition, including an Ottawa Choice Award feature and a placement in Our Homes
• Ecoline Windows & Doors is best for awards and industry recognition, most recently HomeStars’ 2024 Best of the Best Award.
• Verdun Windows & Doors is best for established local experience, running its own Ottawa-area manufacturing plant since 1982.
• Canadian Choice Windows & Doors and Bayview Windows & Doors round out the list for product selection and personalized local service.
• Star ratings alone don’t tell the full story: review volume, BBB accreditation, and certifications matter just as much.
Who this is for: Ottawa and Kanata-area homeowners comparing quotes for a window or door replacement company in 2026, weighing service quality and verifiable credentials over price alone.
Most “top window company” roundups read like a directory, not a comparison: every entry gets five stars and the same vague compliment, and readers are left guessing which claims actually hold up. Buildmart Windows & Doors tops this list for 2026 as the best overall service for window and door replacement in Ottawa, backed by a 4.9-star Google rating and documented award recognition.
Ecoline, Verdun, Canadian Choice, and Bayview made this list on their own merits, not as runner-ups: a national HomeStars award, four decades of in-house local manufacturing, the deepest certification stack of the group, and a smaller, more personal service model, respectively.
This report ranks all five on what’s actually checkable: current Google and HomeStars ratings, review volume, BBB accreditation, ENERGY STAR-rated products, and any award we could confirm independently, rather than repeating what each company’s own homepage says about itself. We researched this independently for Ottawa Life Magazine’s readers; no company paid for placement, and nothing here is affiliate content.
Each company was checked against the same four criteria, so this list holds up as more than an opinion piece.
A single star rating hides more than it reveals, so we weighed Google rating against review volume and recent HomeStars data rather than trusting one flattering number on its own. A 4.9 rating built on a handful of reviews carries less weight than a 4.6 built on hundreds, so volume factored into every company’s placement here.
ENERGY STAR certification, checked against Natural Resources Canada’s certified-products list, anchors this criterion, alongside current BBB accreditation status and product certifications like CSA A440.2 and NAFS, rather than taking any company’s own marketing claims at face value.
Local and industry awards separate companies that show up consistently from ones that just advertise well. We only counted an award or recognition if it could be confirmed through the company’s own site or the awarding organization itself; anything we couldn’t verify independently was left out entirely, no exceptions.
Installation workmanship, as reported in recent reviews, was weighed alongside what each warranty actually covers, the consultation and measurement process, cleanup, and whether post-installation support exists beyond a phone number on a website.
Buildmart has served Ottawa homeowners since 2006, supplying and installing replacement windows, new-construction windows, condo replacements, entry doors, and patio doors from two Ottawa-area showrooms. No single feature earns it the top spot; it’s the combination of consistent reviews, a genuine local presence, a wide product selection, in-house installation, and a warranty that outlasts most competitors, plus the Ottawa Choice Award feature and Our Homes Magazine placement.
Buildmart holds five credentials in one place: a 4.9/5 Google rating from 200-plus reviews, a separate 5/5 on HomeStars, active BBB Accreditation with an A+ rating, ENERGY STAR-rated options, an Ottawa Choice Award feature, and a placement in Our Homes Magazine. Few competitors here match all five at once.
Buildmart’s 25-year warranty spans frames, sashes, hardware, glass units, paint, and installation, longer than most competitors advertise, with ENERGY STAR-rated windows built for Ottawa’s cold-climate demands.
Buildmart’s recent reviews point to the same handful of themes: professional installation crews, clear communication, clean job sites, knowledgeable staff, and noticeable improvements in warmth and sound insulation after replacement.
“Superior customer service by Jordan when it came to buying windows, patio door and front door for our house.” – Leigh Hall, Gloucester, 5 ⭐ on HomeStars (July 2025)
Pros:
• 9-star Google rating built on 200-plus reviews
• 25-year warranty covering frames, sashes, hardware, glass units, paint, and labour
• BBB Accredited Business with an A+ rating since 2017
• Factory-direct pricing across a wide range of styles
Cons:
• The Katimavik Road showroom is by appointment only
• Full-home projects require an in-person consultation, not an instant online quote
Buildmart fits Ottawa, Kanata, and Kingston homeowners replacing multiple windows, anyone who values service quality as much as price, and buyers who want a longer warranty than the industry standard.
▶ See Buildmart’s work in action: Instagram Reel
Contact Buildmart:
Address: 2900 Sheffield Rd, Ottawa, ON | Phone: (844) 680-8414
Ecoline manufactures its own windows and doors in a 180,000-square-foot Ontario facility and has served Ottawa for more than 20 years, using in-house installation crews. Its Ottawa location currently reports 4.7 out of 5 stars from roughly 400-plus Google reviews, and it markets ENERGY STAR-rated, NAFS-22-tested products.
Ecoline’s standout credential is national: HomeStars named it a 2024 Best of the Best Award winner, an honour issued annually since 2009 across more than 100,000 Canadian home service professionals, independently verifiable and not self-issued. Its products are also NAFS-22 tested, a recognized Canadian performance standard.
Ecoline’s recent reviews consistently mention installation quality and product performance holding up in Ottawa’s climate, but scheduling has drawn genuine complaints too, including this one:
“Paul at Econoline windows has been giving us the runaround for eight months.” – Customer of Ecoline Windows, via HomeStars (January 2025)
Pros:
• National HomeStars 2024 Best of the Best Award
• Manufactures its own products in-house
• Large, current review base backing its 4.7-star rating
• NAFS-22 tested, ENERGY STAR-rated options
Cons:
• Ottawa showroom is by appointment only
• The HomeStars award recognizes the company nationally, not Ottawa-specifically
Ecoline fits homeowners who want an established manufacturer with a verifiable national award, a large public review history to check before signing, and enough scale to handle a bigger multi-window project, provided you’re comfortable booking an appointment-only showroom visit and confirming a realistic timeline upfront.
Contact Ecoline:
Address: 2081 Merivale Rd #201, Ottawa, ON (by appointment) | Phone: (613) 903-7005
Verdun has run its own manufacturing operation out of Vars, just outside Ottawa, since 1982, giving it more than four decades of local history and control over its own production line. It holds active BBB Accreditation with an A+ rating since 2017 and a HomeStars footprint of roughly 1,700 reviews averaging 4.7 out of 5. (Individual Google listings for Verdun vary by location; we’re citing its larger, verifiable HomeStars sample here.)
Verdun manufactures replacement windows, including triple-pane options built for Ottawa winters, plus entry and patio doors, with custom configurations for non-standard openings.
Verdun’s recent HomeStars reviews describe professional, courteous installers. Independent complaint records also document real service gaps at times, including order delays and post-installation communication issues.
Pros:
• More than 40 years of in-house Ottawa-area manufacturing
• BBB A+ accreditation since 2017
• Large HomeStars review base (~1,700) averaging 4.7/5
• Triple-pane and custom configurations available
Cons:
• Documented complaints about order delays and follow-up communication
• Ratings vary by listing, so check reviews for the specific crew quoting your job
Verdun fits homeowners who value a long-established, in-house Ottawa manufacturer over a dealer-installer model, are comfortable with a bigger company that manufactures at real scale, and make a point of reading recent reviews carefully before booking, given the documented complaints above.
Contact Verdun:
Address: 104 Clement St, Vars, ON K0A 3H0
Canadian Choice has operated since 1997 and serves Ottawa from a Colonnade Road location, backed by a national manufacturer that has installed more than a million windows across Canada. Its Ottawa listings show 4.6 out of 5 from roughly 280 Google reviews.
Canadian Choice’s catalogue leans toward vinyl windows, plus steel entry and patio doors, with double- and triple-glazing options. Products carry CSA A440.2-19, NAFS, ENERGY STAR, and SAWDAC WindowWise certification, a denser certification stack than most companies on this list.
Canadian Choice’s certification stack is its strongest asset; review volume is solid but smaller than Verdun’s or Bayview’s, with reviewers most often citing style selection as the draw.
Pros:
• Four separate third-party certifications (CSA, NAFS, ENERGY STAR, SAWDAC WindowWise)
• Broad style selection across windows and doors
• 25-year transferable warranty
• National scale with a dedicated Ottawa location
Cons:
• Headquartered outside Ottawa, so service depth can vary by crew
• Smaller Ottawa-specific review sample than the larger local players here
Canadian Choice fits homeowners who want to compare several window styles and configurations in one showroom and care most about a verifiable, independently documented certification set, and are comfortable working with a national provider rather than a purely local one.
Contact Canadian Choice:
Address: 148 Colonnade Rd S, Unit 1C-1D, Ottawa, ON K2E 7R4 | Phone: (613) 209-0172
Bayview is a locally owned family business that has served the greater Ottawa region for more than two decades from its Richmond showroom, built around a more personal, hands-on customer experience than a high-volume installer typically offers.
Bayview holds a 4.9 out of 5 rating from roughly 579 HomeStars reviews, matching Buildmart’s rating on a meaningfully large sample, with reviewers praising installer professionalism and follow-through.
Bayview backs its work with a lifetime labour warranty, a stronger installation guarantee than most competitors offer, alongside standard manufacturer product warranties.
Pros:
• 9-star rating from a large, current HomeStars base
• Lifetime labour warranty on installation
• Locally owned, with a more personalized sales process
• BBB A+ standing
Cons:
• Smaller operation than Ecoline, Verdun, or Canadian Choice, so lead times can run longer in peak season
• Richmond showroom means a longer drive from Ottawa’s east end
Bayview fits homeowners who prioritize a personal, locally owned experience and a strong labour warranty over scale and who don’t mind a slightly longer drive to the Richmond showroom or a longer lead time during peak season in exchange for that more hands-on service.
Contact Bayview:
Address: 6270 Perth St, Richmond, ON K0A 2Z0 | Phone: (613) 838-2211
Ratings and warranties are already covered in the table above, so this one looks at what actually separates these five in practice: how long they’ve operated in the area, how they manufacture and install, how you’d book a consultation, and what kind of project each is best suited for.
| Factor | Buildmart | Ecoline | Verdun | Canadian Choice | Bayview |
| Years serving the Ottawa area | Since 2006 (~20 years) | 20+ years | Since 1982 (40+ years) | Since 1997, national manufacturer | 20+ years |
| Manufacturing model | Supplier/installer, factory-direct pricing | In-house manufacturer (own Ontario facility) | In-house manufacturer (own Vars plant) | National manufacturer, 1M+ windows installed across Canada | Family-owned installer |
| Showroom/consultation | Two Ottawa-area locations, one appointment-only | Appointment-only Ottawa showroom | Vars manufacturing showroom | Colonnade Rd, Ottawa | Richmond showroom |
| Best project fit | Full range, including new construction and condo replacements | Larger, multi-window projects | Custom or non-standard window openings | Homeowners comparing multiple styles in one visit | Smaller, more personalized projects |
| Review volume | 200+ | 400+ | ~1,700 | ~280 | ~579 |
A premium window installed poorly underperforms a mid-range window installed correctly. Bad installation is the leading cause of air leakage, water infiltration, reduced insulation value, and denied warranty claims.
Ottawa averages around 4,500 heating degree days a year according to Canada’s Centre for Climate Services, a meaningfully harsher heating load than Toronto. Triple-pane windows cost more upfront but typically deliver better thermal performance, lower street noise, and less condensation.
A 4.8-star average from three-year-old reviews tells you less than a 4.5-star average built on last month’s feedback. Look for what recent reviewers say about installation quality, delays, cleanup, and warranty claims.
Before signing anything, confirm whether the warranty covers glass, frame, hardware, labour, and finish separately, and whether it transfers to a new owner if you sell.
Don’t assume a specific dollar amount is guaranteed; programs and eligibility shift year to year. Ontario homeowners currently have access to utility-run incentives, including Enbridge Gas’s Home Renovation Savings Program, but ask your installer directly which programs currently apply and what documentation they need.
How much does window replacement cost in Ottawa?
Cost depends on how many windows you’re replacing, their size and style, frame material, double- versus triple-glazing, and whether it’s a full-frame replacement or retrofit. A like-for-like comparison across quotes matters more than one bottom-line number.
How long does window replacement take?
The timeline breaks into three stages: an in-home quote and measurement visit, manufacturing time for custom sizes, and installation. A handful of windows can often go in within a day; whole-home projects typically run several days.
How do I know if a window company is reputable?
Check its Google and HomeStars ratings alongside review volume, confirm current BBB status, ask what product certifications it carries, and verify any advertised awards independently rather than taking them at face value.
Should I get multiple quotes before replacing my windows?
Yes. Get at least three quotes and confirm the specifications actually match, same glazing, same frame material, same warranty terms, before comparing prices directly.
Does Buildmart’s 25-year warranty cover installation, or just the windows themselves?
Both. Buildmart’s warranty spans frames, sashes, hardware, insulated glass units, paint finish, and installation labour, not just the product. That’s broader coverage than the manufacturer-only warranties several other companies on this list currently advertise, so it’s worth confirming the same scope in writing before comparing quotes.
Across reviews, certifications, and awards, Buildmart Windows & Doors comes out as the best overall service for window and door replacement in Ottawa in 2026, with a 4.9-star Google rating, BBB A+ accreditation, a 25-year warranty, and documented recognition from the Ottawa Choice Awards and Our Homes Magazine.
But the right pick still depends on what you’re optimizing for: Ecoline for its national HomeStars award and manufacturing scale, Verdun for four decades of established local experience, Canadian Choice for the deepest certification stack, and Bayview for smaller-scale, personalized service.
Whichever company you choose, confirm the warranty in writing and check recent reviews first.
