High Quality, Energy Efficient Replacement Windows

We match all written estimates and give up to 10% off lowest quoted price

Replacement Windows and Doors GTA

Our windows, entry doors and patio doors are manufactured in Canada using state of the art process, ensuring each door and window meets or exceeds Ontario building code.

Reliable & Experienced Windows and Doors Replacement Contractors in Greater Toronto Area

We have installed hundreds of windows and doors over the last few years, with aim to provide greatest customer experience. Our clients’ referrals and repeat business are the most important accolade for us that we always strive to earn.

another window replacement project by ON Star Windows & Doors in suburban Ontario

  • Free On-Site Estimate

  • Professional Installation

  • Warranty & Repairs

Props from
Satisfied Customers

Book a Free In Home Estimate or call us at 1 (800) 383-6041

Recent Blog Posts

What are the Top 5 Patio Door Trends?

Patio doors can be of great help as it can change the style of your house and enhance the overall curb feel. Most people customized their patio doors, eventually with suc...

March 17th, 2019

5 Mistakes to Avoid When Buying Replacement Windows

When the windows of your home ages and you notice signs of damage, it’s time to bid adieu to your old friend! Window replacement is not an easy task and most homeowners...

March 21st, 2019

Best of 2019 by Homestars

We are proud to announce our winning of Best of 2019 Award by HomeStars.com. Thanks to you, our customers for nominating us. It's a great encouragement to us, to continue...

March 12th, 2019

Start with a Quote. It’s Easy and free!

We’ll make your window and door replacement experience simple and offer you the best value. Schedule your free, no-obligation in-home consultation today!

  • *
  • *
  • *
  • *