Three Generations of
Calgary Craftsmanship
Since 1978, Cossins Windows and Doors has been manufacturing premium windows in Calgary and installing windows and doors across the region. Our family values still guide every project.
A Family Legacy,
Built in Calgary
In 1978, the Cossins family opened their doors in Calgary with a simple belief: that homeowners deserve windows and doors built with integrity, installed with care, and backed by people who stand behind their work. Nearly five decades later, that belief hasn't changed.
What started as a small, family-run operation has grown into one of Calgary's most trusted names in premium windows and doors — while remaining true to the values that built our reputation. Three generations of the Cossins family have guided this company, and our commitment to quality craftsmanship and personal service has never wavered.
Today, we continue to manufacture our window lines right here in Calgary, using the latest technology while maintaining the hands-on attention to detail that has defined us for over 40 years. Every project is specified and prepared by our in-house team, and we take that responsibility seriously.
The Cossins
Difference
Family Values
Three generations of the Cossins family have guided this company. We treat every homeowner's project as if it were our own home — because that's how we were raised.
Local Manufacturing
Our Calgary manufacturing facility uses the latest and most efficient technology to produce UPVC vinyl, aluminum-clad, and traditional wood windows — all custom built to your specifications.
Our Own Installers
Our trained in-house installation teams focus on consistent quality standards from project preparation to your front door.
One Team
Sales, manufacturing, and installation — one team working together. No middlemen, no finger-pointing. Just people who take pride in their work and stand behind it.
Quality Without Compromise
We don't cut corners. From Truth Encore hardware to Low-E Argon glass, every component is selected for performance and longevity in Alberta's demanding climate.
Stress-Free Process
Leave it up to us. From your first consultation through final installation, we manage every detail so you can enjoy the transformation without the headaches.
Nearly Five Decades of
Calgary Excellence
Founded in Calgary
The Cossins family opens their first manufacturing facility in Calgary, beginning a legacy of quality window and door craftsmanship.
Growing Reputation
Word spreads across Calgary. Cossins becomes the trusted name for premium replacement windows — quality products without the premium price.
Second Generation
The second generation of the Cossins family takes the helm, expanding product lines to include aluminum-clad wood and a full range of exterior doors.
Technology & Tradition
Investment in state-of-the-art manufacturing technology — fusion-welded PVC, Low-E Argon glass, and Truth Encore hardware — while maintaining hands-on craftsmanship.
Third Generation
Three generations now guide the company. Expansion into new construction projects across Southern Alberta, including Banff, Canmore, and the Crowsnest Pass.
Still Local, Still Family
Nearly 50 years later, Cossins remains family-owned, locally manufactured, and installed by our own in-house teams. The same values, the same commitment, the same family.
"To provide the highest quality products at a competitive price while implementing new technologies into our production methods — and to maintain an atmosphere of courtesy and respect for our customers and staff."
— The Cossins Family
Manufactured in Calgary,
Installed by Our Team
Cossins Windows is proud to be a local manufacturer achieving excellence in all our products. Using the latest and most efficient technology, we manufacture UPVC vinyl, aluminum-clad, and traditional wood windows right here in our Calgary facility.
What we manufacture in CalgaryFor established Calgary homes, read our guide to wood window replacement and preserving the character of wooden exterior windows.
We also offer a full line of exterior doors and patio doors — fibreglass entry, metal-clad wood, and PVC sliding patio doors. Every one of our products can be customized to meet the size and design aesthetic your project demands.
Calgary & Beyond
For over 40 years, we've served Calgary's most discerning homeowners — from heritage estates to contemporary new builds across the city. Our reputation has grown through word of mouth, one exceptional project at a time.
Today, our reach extends across Southern Alberta. We've completed landmark projects in Banff, Canmore, the Crowsnest Pass, and throughout the foothills — bringing the the same in-house project care and our own installation teams to every location.
Ready to Experience the
Cossins Difference?
Visit our Calgary showroom or schedule a private consultation. We'll walk you through our products, discuss your project, and show you why Calgary homeowners have trusted us for three generations.