MBR Portes et Fenetres Par Michel Bergeron Rénovations Inc.
“Job well done, quickly and cleanly, in addition to extremely courteous service!”
Best Window Installers in L'Assomption, QC
15 companies listed · 5 in L'Assomption · 3 open weekends · 10 rated 4.5+ · 7 show a licence
Data verified October 17, 2026
Atelier Vitrerie Suprême
“Very very satisfied with the staff, starting with Simon the gold of the submission, Nicholas and his colleague for the installation, quality work which is rare these days and without any unpleasant surprises.”
Portes Et Fenêtres Lacombe
“The customer service is excellent as well as the supplier offered for the installation.”
Aubin et Fils Inc Vitrerie et Rénovation
Portes et Fenêtres Solux
Fenplast
“Just to tell you that we appreciated the two employees who came to install our new window, very conscientious, respectful and very professional.”
Listed for homeowners in and around L'Assomption, QC, these 15 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: L'Assomption, QC
5 of the 15 companies we list are based in L'Assomption; the other 10 serve L'Assomption from towns including Varennes (17 km), Repentigny (12 km) and Mascouche (17 km). 13 of the companies on this page have a rating, from 4.1 to 5.0 across 650 reviews; 5 have 50 or more reviews and 10 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (93%), quality (79%) and value (69%). 3 are open on Saturdays and 2 on Sundays. 7 show a licence on their websites. Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 1996. 1 gives free estimates and 2 list coupons or special offers. We have a website on file for 14 of the companies on this page; 9 publish a contact page and 6 list a public email. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Do the listed window companies all have premises in L'Assomption?
5 of the 15 give an address in L'Assomption itself; the rest serve it from within 25 km. A showroom often covers a whole region, so distance matters less than who does the installing. Ask whether the fitters are employees, and how a callback in the middle of winter is handled.
Vitrerie Justalex Varennes
“Very good service and just for a part at $40 received outstanding service”
Instaltech G.L
“A more than perfect service installation a+ the broom passed everywhere picking up the old doors and all with a smile already looking forward to the next Reno thank you all”
Fabelta Windows Systems
“We were very satisfied with Fabelta's service - from sales (Marie-Lou) to installation (Yassine) - it was a pleasure to work with them.”
Portes et Fenêtres Lamater Inc.
“Made according to the rules of the art and I have nothing to complain about.”
Portes et Fenêtres Verchères
“Thank you very much to Porte et Fenêtre Verchères, very professional service and great product quality!”
Portes d'Acier Le Gardeur (Les)
“They quickly helped us resolve our problem and we felt well advised.”
Vitrerie Qualitech
“Very good service, very nice people.”
Multi-Fenêtres
“We purchased a superb door at a very reasonable price and we received excellent service during both sales and installation.”
Entreprise Serge Gaudette
“Service and great quality of work”
Why these companies made our list
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