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

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Satisfied Customers

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

Recent Blog Posts

How to Save Energy and Lower Your Electric Bill

Are you stressed over your mounting energy bills and looking for ways to reduce your energy costs? For most homeowners, keeping their house warm without spending hundreds...

April 19th, 2019

The Most Common Window Problems and Tips to Fix Them

You keep the walls and floor of your home in pristine condition but what about the windows? Windows are as important as any other part of the home, still, most homeowners...

April 18th, 2019

6 Most Popular Types of Windows for Your Home

One of the most important home improvement projects is window replacement. Windows play a crucial role in letting in natural light and providing ventilation but not all w...

April 17th, 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!

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