Why Alton Windows

Alton Windows Certified Installation
Installation of windows can make or break a successful window replacement – this is a crucial task which must be completed carefully and accurately.  When it's time to have your Alton windows or doors installed in your home, our professionals are certified to maintain the highest installation standards and ensure thorough cleanup after the work is done.  Our installers are trained to complete your custom look for your home

Manufactures Energy Efficient Windows


Our Toronto window company has been manufacturing windows for over 35 years. At Alton Windows and Doors, we manufacture our own aluminum and vinyl windows that are energy-efficient certified. Our intelligent design and multiple weatherstrips prevent heat and cold from being conducted through the frame. Our energy-efficient windows are designed to save you money.

Lifetime Warranty


Installing windows and doors is something that will probably occur only once or twice in the lifetime of your home.  We stand behind our products and customers who have joined the Alton family are confident that we will be there for the life of their windows and doors.  We at Alton Windows and Doors will repair or replace any of our products that are faulty in materials or workmanship for the lifetime of your windows. 

Trained Sales Representatives


At Alton, we pride ourselves in having only professionally trained sales representatives who truly understand windows and will work with you to best understand your needs.  Our sales representatives will give you a free assessment of your window needs, in a timely manner, and recommend the windows best suited to your home and décor.

Client Reviews

I didn't hesitate to call Alton when I had to replace my side door and window. I had used them before and had exceptional service and was happy with the end result. I highly recommend them.

— Emily Bianchi

You know it's a good company when the owner shows up! We needed an emergency repair for a window we bought 20 years ago. We called the company, and the owner, John personally came over within :30 to fix it. That says it all about their great customer service.We've bought several windows and doors from Alton, always great advice, service and fair price.

— Rachel Kampus

Amazing service and love love love my windows! Went in 2 weeks ago and it was a great experience from start to finish. I read the previous review regarding the Mandated Health & Safety Guidelines and I can’t believe the comment. I was actually asked to return to my car and get my mask (was rushing and I forgot it) also I was asked to wait 6 feet away from the other customer that was at the front desk. I felt very satisfied with how they followed Health & Safety regulations. I would definitely recommend this company to anyone.

— Kathy L

Follow us

Contact us

Interested in working together? Fill out some info and we will be in touch shortly. We can’t wait to hear from you!