EXCLUSIVE OFFER: Triple-Pane Windows 50% OFF

Finally... Triple-Pane Windows That Are Affordable To Everyone. Installed In Just 1 Day And Built To Last from $69/month.

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  • 1-DayInstallation
  • 1-YearPrice Guarantee
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Before and after house with new windows

Here’s How Much It Should Cost To Install A New Windows ⬇

How old are your current windows and doors?

Available Across the GTA Area

As a leading name in window replacement in the GTA area, we've completed over 20,000 projects with unmatched expertise. We make luxury high-quality windows affordable, durable, and built to last a lifetime.

  • 4.8
  • 5.0
  • 4.8
  • A+

Company reviews across all branches as of 01/15/2026.

Custom-Built To Any Size, Space & Need

Here’s How Much It Should Cost To Install A New Windows ⬇

How old are your current windows and doors?

See What Our Customers Say

VERIFIED PURCHASE

Emily Thompson

Ontario Windows did a fantastic job replacing our windows! The team was professional, on time, and paid close attention to every detail. The installation was smooth, and the results look amazing. Our home feels brighter and more comfortable. Highly recommend!

VERIFIED PURCHASE

Jessica Martin

I'm very happy with the work done by Ontario Windows. You can really see their experience and quality in the final result. The installers were respectful, efficient, and professional throughout the entire process. Our new windows look impressive — I definitely recommend this company.

VERIFIED PURCHASE

Michael Anderson

I'm absolutely thrilled with the window installation by Ontario Windows. From the very beginning, they were professional, punctual, and attentive. They helped us choose the right windows, stayed within budget, and completed everything on time. The final result exceeded our expectations.

VERIFIED PURCHASE

Ryan Campbell

Excellent window installation service! The team was reliable, professional, and very easy to communicate with. Everything was completed on schedule with great attention to detail, and the windows look even better than we expected. Highly recommended for anyone looking for quality window installation.

VERIFIED PURCHASE

Matthew Johnson

Amazing experience from start to finish! The crew handled everything with great care and kept us informed at every step. The new windows completely transformed our home — it feels warmer, quieter, and brand new. Very happy with the service and would definitely choose Ontario Windows again.

VERIFIED PURCHASE

Lauren Wilson

Ontario Windows truly lived up to the name! The team was friendly, fast, and did outstanding work. The installation was clean and efficient, and our new windows look fantastic. Couldn't be happier — highly recommend!

1-Day installation process

  1. 01

    Old Window Removal

    We carefully remove your old windows and dispose of them safely, protecting your walls, trim, and flooring throughout the process.

  2. 02

    Opening Prep & Insulation

    We prepare the window opening, inspect the frame, and add proper insulation and sealing to prevent drafts, moisture, and heat loss.

  3. 03

    New Window Installation

    Your new energy-efficient windows are installed, leveled, and secured for long-term performance and smooth operation.

  4. 04

    Finishing & Quality Check

    We complete interior and exterior finishing, seal everything properly, and test each window to ensure it looks great and performs perfectly.

Here’s How Much It Should Cost To Install A New Windows ⬇

How old are your current windows and doors?