Windows and Doors Thornhill

FREE In-Home Estimate (905) 326-3444

Get a Free Estimate

NorthShield has been servicing Thornhill and its surrounding areas for over 20 years. As such, our team is fully certified and has the necessary equipment, experience, and expertise to provide you with exceptional results. In fact, our team will work with you to determine just what your needs are in order to find the perfect window for your home as well as install your new window in a timely fashion.

So if you’re looking for high-quality windowsdoors, call our professional window replacement experts at (905) 326-3444 for a free, no-obligation, in-home estimate today!


    Looking for a specific type? Custom? Versatile? Uncertain about the costs to replace your windows and doors? The NorthShield team is here to help! We offer a free, no-obligation, in-house estimate. This way you can see all your options and make the best decision for your home.

    NorthShield Windows & Doors is consistently rated highly by our customers – not because we’ve been in service for over 20 years and are fully certified but because we always deliver top quality services.

    At NorthShield, we stand firmly behind the work we do. Whether is a product or our window replacement service, we offer warranties – most being lifetime warranties – simply for our clients’ peace of mind. Because our priority has always been our clients’ satisfaction.

    NorthShield is known to make windows with the latest energy efficient features. Whether its triple pane windows or windows made with low-E technology for your homes, our products will definitely save you money in the long-run.





The team at NorthShield Windows & Doors is committed to improving the homes of our customers with our incredible window products and our window replacement service in Thornhill. We take great pride in our ability to help homeowners build the home of their dreams.

Our products plus your home equals magnificent results. So don’t settle for less than the best. Give us a call today to inquire about our top-tier products like our triple glass windows, which will vastly improve the quality of life in your home. Our experts in Thornhill are here to help you.

For all your window replacement needs, call our team in Greater Toronto Area.

View Our Windows Collection



If there is one thing we know at NorthShield, it’s windows & doors in Thornhill. We have been in this industry for over 20 years now, and we know what homeowners need out of the products we carry. Whether it’s a vinyl window or an entry door, you can rely on our products to deliver on both aesthetic and functionality.

As a Canadian company, we understand that Canadian homeowners have specific requirements for their windows and doors. We know how to cater to those requirements, which is why we are always able to meet our clients’ wants and desires.

Our Installation Process


At NorthShield Windows & Doors, we believe that your home deserves the best. That’s why we offer a wide array of windows that are meant to withstand any weather condition.

If vinyl aesthetics is what you’re after, our options range from grill and glass windows, to energy-efficient windows, and much more.  In addition, with our multiple colour combinations available, the possibilities for your home are endless. Our factory-direct doors and windows come hot off the press in order to ensure the ultimate in durability and quality.

Tel: (905) 326-3444

Address: 364 Supertest Road, Unit 206

Toronto, Ontario, M3J 2M2

Window frames
25 years warranty.

Window hardware
25 years warranty.

Window glass
25 years warranty.

Window installation
15 years warranty.

Window colour
10 years warranty.

Entry doors frame
10 years warranty.


“Great service. Replaced 6 windows and patio door with NorthShield Windows and Doors. Eugene was amazing in providing the estimate and Brad and the team came to install it, everything was installed within 6 hours and they cleaned after they were done. Thank you guys.”
“Great experience with them! Everything from the salesman (Walter) who came to our home to the office staff that set up our installation to the four men who installed the windows has been handled professionally. Very happy with the overall process.”
“We had our front door replaced in mid-September. First off, Rod who sold us on North Shield gave us a great price and was really nice to work with. Our installer Cody was very professional and very friendly at the same time. He did an excellent job. We’re so very happy. Thank you NorthShield.”
“Great workmanship! The crew showed up on time, they were friendly as well as professional. their work was efficient, fast and clean. Russ explained operation of the windows after and if there were any problems they would fix them right away. I would highly recommend this company.”
“This is a very professional company and i loved the guys who did the job. They did an amazing job and I'm very happy that i choose to work with NorthShield company. They did for me 15 windows and it looks great. In addition they gave me a very responsible price. Can't Recommend Highly Enough!!”
“I would highly recommend NorthShield Windows and Doors to anyone looking to have their windows replaced. They were so friendly, efficient and CLEAN!! They exceeded all my expectations. Not a single piece of garbage was left behind. The quality and care they put into their work is amazing!”

Prices By Window

$2000 - $4000
$2900 - $5000
$420 - $1100
$420 - $1100
Fixed Casement Window
$350 - $850
Single Slider
Tilt Window
$400 - $950
Double Slider
Tilt Window
$420 - $1000
Single Hung
Tilt Window
$410 - $970
Double Hung
Tilt Window
$420 - $970
$400 - $800
$540 - $1200


Prices by Room

We specialize in expert window installation for any room in your home. The boxes below show an estimate range of window installation costs for particular rooms. To find out more, click on the box you're interested in, and contact us for a detailed quote.